¿Por qué no puedo abrir files DMG que residen en un sistema de files NFS de solo lectura?

Descubrí un problema extraño … si tengo files de image de disco (DMG) que residen en un recurso compartido NFS de solo lectura, no puedo abrirlos en Mac OS X 10.7.5. Los mismos files se abren bien cuando se accede a través de AFP. Sin embargo, al tratar de abrirlos usando hdiutil attach cuando están en el recurso compartido de NFS, los resultados hdiutil attach en "attach failed – Read-only file system":

 bash-3.2# /usr/bin/hdiutil attach /Volumes/nfs_share/Some.dmg hdiutil: attach failed - Read-only file system 

Incluso si el recurso compartido AFP es de solo lectura, puedo adjuntar esas mismas imágenes. Pero, por alguna razón, un recurso compartido NFS de solo lectura no funciona.

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  • En última instancia, lo que quiero hacer es adjuntar las imágenes con un file de sombra , para montar las imágenes de solo lectura como de lectura-escritura. Pero esto también falla de la misma manera:

     bash-3.2# /usr/bin/hdiutil attach /Volumes/nfs_share/Some.dmg -mountpoint /Somewhere -shadow /path/to/Some-Shadow hdiutil: attach failed - Read-only file system 

    De nuevo, esto funciona perfectamente si la image se sirve a través de AFP. También funciona bien si el recurso compartido de NFS es de lectura-escritura, pero por razones de security no puedo hacer eso.

    ¿Cómo puedo montar files DMG que residen en un recurso compartido NFS de solo lectura?


    Información Adicional:

    La línea relevante de /etc/exports en el server FreeNAS (FreeBSD 8.2-RELEASE-p7):

     /mnt/raid/netboot -alldirs -ro -mapll=netboot:netboot -network 10.100.0.0/16 

    La salida de /usr/bin/hdiutil attach -verbose /Volumes/netboot/Lion.nbi/Library.dmg -notremovable -shadow /private/var/netboot/Library-Shadow -owners on -noverify -noautofsck -nobrowse :

     Initializing… DIBackingStoreInstantiatorProbe: interface 0, score 100, CBSDBackingStore DIBackingStoreInstantiatorProbe: interface 1, score -1000, CBundleBackingStore DIBackingStoreInstantiatorProbe: interface 2, score -1000, CRAMBackingStore DIBackingStoreInstantiatorProbe: interface 3, score 100, CCarbonBackingStore DIBackingStoreInstantiatorProbe: interface 4, score -1000, CDevBackingStore DIBackingStoreInstantiatorProbe: interface 5, score -1000, CCURLBackingStore DIBackingStoreInstantiatorProbe: interface 6, score -1000, CVectonetworkingBackingStore CBSDBackingStore::newProbe stat() failed. No such file or directory. DIBackingStoreInstantiatorProbe: interface 0, score 1, CBSDBackingStore DIBackingStoreInstantiatorProbe: interface 1, score -1000, CBundleBackingStore DIBackingStoreInstantiatorProbe: interface 2, score -1000, CRAMBackingStore DIBackingStoreInstantiatorProbe: interface 3, score -1000, CCarbonBackingStore DIBackingStoreInstantiatorProbe: interface 4, score -1000, CDevBackingStore DIBackingStoreInstantiatorProbe: interface 5, score -1000, CCURLBackingStore DIBackingStoreInstantiatorProbe: interface 6, score -1000, CVectonetworkingBackingStore DIBackingStoreInstantiatorProbe: interface 0, score 100, CBSDBackingStore DIBackingStoreInstantiatorProbe: interface 1, score -1000, CBundleBackingStore DIBackingStoreInstantiatorProbe: interface 2, score -1000, CRAMBackingStore DIBackingStoreInstantiatorProbe: interface 3, score 100, CCarbonBackingStore DIBackingStoreInstantiatorProbe: interface 4, score -1000, CDevBackingStore DIBackingStoreInstantiatorProbe: interface 5, score -1000, CCURLBackingStore DIBackingStoreInstantiatorProbe: interface 6, score -1000, CVectonetworkingBackingStore Attaching… Error 30 (Read-only file system). Finishing… DIHLDiskImageAttach() returned 30 hdiutil: attach failed - Read-only file system 

    Salida de rpcinfo -p en el server NFS:

      program vers proto port service 100000 4 tcp 111 rpcbind 100000 3 tcp 111 rpcbind 100000 2 tcp 111 rpcbind 100000 4 udp 111 rpcbind 100000 3 udp 111 rpcbind 100000 2 udp 111 rpcbind 100000 4 local 111 rpcbind 100000 3 local 111 rpcbind 100000 2 local 111 rpcbind 100005 1 udp 967 mountd 100005 3 udp 967 mountd 100005 1 tcp 967 mountd 100005 3 tcp 967 mountd 100003 2 udp 2049 nfs 100003 3 udp 2049 nfs 100003 2 tcp 2049 nfs 100003 3 tcp 2049 nfs 100024 1 udp 689 status 100024 1 tcp 689 status 100021 0 udp 616 nlockmgr 100021 0 tcp 927 nlockmgr 100021 1 udp 616 nlockmgr 100021 1 tcp 927 nlockmgr 100021 3 udp 616 nlockmgr 100021 3 tcp 927 nlockmgr 100021 4 udp 616 nlockmgr 100021 4 tcp 927 nlockmgr 

    Salida de mount en el cliente Mac OS X 10.7.5:

     /dev/disk1s2 on / (hfs, local) devfs on /dev (devfs, local, nobrowse) afp_0egBhf12TAP01SptRt47XSdj-3.2c000002 on /private/var/netboot (afpfs, nobrowse) afp_0egBhf12TAP01SptRt47XSdj-4.2c000004 on /Network/Applications (afpfs, read-only) map -hosts on /net (autofs, nosuid, automounted, nobrowse) map auto_home on /home (autofs, automounted, nobrowse) afp_0egBhf12TAP01SptRt47XSdj-4.2c000008 on /Network/Servers/chef.farcry.sitepalette.com/Users (afpfs, nodev, nosuid, automounted, nobrowse, mounted by jnet) afp_0egBhf12TAP01SptRt47XSdj-4.2c000009 on /Volumes/Users (afpfs, nodev, nosuid, mounted by jnet) 10.100.1.2:/mnt/raid/netboot on /Volumes/netboot (nfs) 

    Y finalmente, la salida de /usr/bin/hdiutil attach -debug /Volumes/netboot/Lion.nbi/Library.dmg -notremovable -shadow /private/var/netboot/Library-Shadow -owners on -noverify -noautofsck -nobrowse :

     calling DIHLDiskImageAttach with skip-verify: true auto-fsck: false drive-options: quiet: false shadow-url: file://localhost/private/var/netboot/Library-Shadow mount-nobrowse: true enable-owners: true verbose: false debug: true agent: hdiutil fixed-disk: true image-options: main-url: file://localhost/Volumes/netboot/Lion.nbi/Library.dmg 2012-11-27 12:02:23.053 hdiutil[23401:707] DIHLDiskImageAttach: input dictionary { agent = hdiutil; "auto-fsck" = 0; debug = 1; "drive-options" = { }; "enable-owners" = 1; "fixed-disk" = 1; "image-options" = { }; "main-url" = "file://localhost/Volumes/netboot/Lion.nbi/Library.dmg"; "mount-nobrowse" = 1; quiet = 0; "shadow-url" = "file://localhost/private/var/netboot/Library-Shadow"; "skip-verify" = 1; verbose = 0; } 2012-11-27 12:02:23.054 hdiutil[23401:707] DIHLDiskImageAttach: disabling legacy image format attach 2012-11-27 12:02:23.055 hdiutil[23401:707] DIHLDiskImageAttach: newImagekeys = { "legacy-disabled" = 1; } 2012-11-27 12:02:23.055 hdiutil[23401:707] DIHLDiskImageAttach: creating DIHelperProxy 2012-11-27 12:02:23.056 hdiutil[23401:707] with dictionary: { agent = hdiutil; "auto-fsck" = 0; debug = 1; "drive-options" = <62706c69 73743030 d0080000 00000000 01010000 00000000 00010000 00000000 00000000 00000000 0009>; "enable-owners" = 1; "fixed-disk" = 1; "image-options" = <62706c69 73743030 d101025f 100f6c65 67616379 2d646973 61626c65 6409080b 1d000000 00000001 01000000 00000000 03000000 00000000 00000000 00000000 1e>; "main-url" = "file://localhost/Volumes/netboot/Lion.nbi/Library.dmg"; "mount-nobrowse" = 1; operation = DIHelperAttach; quiet = 0; "shadow-url" = "file://localhost/private/var/netboot/Library-Shadow"; "skip-verify" = 1; verbose = 0; } 2012-11-27 12:02:23.056 hdiutil[23401:707] [DIHelperProxy alloc] 2012-11-27 12:02:23.056 hdiutil[23401:707] [DIHelperProxy alloc] returning self 0x7fa39b00d690, retainCount 1 2012-11-27 12:02:23.057 hdiutil[23401:707] DIHLDiskImageAttach: running DIHelperProxy 2012-11-27 12:02:23.057 hdiutil[23401:707] [DIHelperProxy performOperationReturning] entry 2012-11-27 12:02:23.057 hdiutil[23401:707] [DIHelperProxy performOperationReturning] detaching thread 2012-11-27 12:02:23.058 hdiutil[23401:2803] [DIHelperProxy workerThread] entry 2012-11-27 12:02:23.058 hdiutil[23401:2803] [DIHelperProxy workerThread] setting up server 2012-11-27 12:02:23.059 hdiutil[23401:2803] [DIHelperProxy threadSetupServer] entry 2012-11-27 12:02:23.059 hdiutil[23401:2803] [DIHelperProxy threadSetupServer] setting up _headerConnection 2012-11-27 12:02:23.060 hdiutil[23401:2803] [DIHelperProxy threadSetupServer] setting up _headerConnection rootObject 2012-11-27 12:02:23.060 hdiutil[23401:2803] [DIHelperProxy threadSetupServer] adding NSConnectionDidInitializeNotification notification 2012-11-27 12:02:23.061 hdiutil[23401:2803] [DIHelperProxy threadSetupServer] exiting 2012-11-27 12:02:23.061 hdiutil[23401:2803] [DIHelperProxy workerThread] launching 2012-11-27 12:02:23.061 hdiutil[23401:2803] [DIHelperProxy threadLaunchToolAuthenticated] entry 2012-11-27 12:02:23.063 hdiutil[23401:2803] launching helper tool at "/System/Library/PrivateFrameworks/DiskImages.framework/Resources/diskimages-helper". 2012-11-27 12:02:23.063 hdiutil[23401:2803] [DIHelperProxy threadLaunchToolAuthenticated] adding NSTaskDidTerminateNotification notification 2012-11-27 12:02:23.063 hdiutil[23401:2803] [DIHelperProxy thread LaunchToolAuthenticated] launching 2012-11-27 12:02:23.065 hdiutil[23401:2803] [DIHelperProxy threadLaunchToolAuthenticated] exiting 2012-11-27 12:02:23.065 hdiutil[23401:2803] [DIHelperProxy workerThread] running runloop 2012-11-27 12:02:23.081 hdiutil[23401:2803] [DIHelperProxy helperConnectionInitialized] entry 2012-11-27 12:02:23.081 hdiutil[23401:2803] [DIHelperProxy helperConnectionInitialized] adding new NSConnectionDidDieNotification notification 2012-11-27 12:02:23.081 hdiutil[23401:2803] [DIHelperProxy helperConnectionInitialized] removing old NSConnectionDidDieNotification notification 2012-11-27 12:02:23.082 hdiutil[23401:2803] [DIHelperProxy helperConnectionInitialized] removing old connection rootObject 2012-11-27 12:02:23.082 hdiutil[23401:2803] [DIHelperProxy helperConnectionInitialized] invalidating old connection 2012-11-27 12:02:23.083 hdiutil[23401:2803] [DIHelperProxy helperConnectionInitialized] releasing old connection 2012-11-27 12:02:23.083 hdiutil[23401:2803] [DIHelperProxy helperConnectionInitialized] and replacing with new connection 2012-11-27 12:02:23.083 hdiutil[23401:2803] [DIHelperProxy helperConnectionInitialized] exit 2012-11-27 12:02:23.085 hdiutil[23401:2803] [DIHelperProxy connectToFramework] entry, helper 0x7fa39b016940 2012-11-27 12:02:23.085 hdiutil[23401:2803] [DIHelperProxy connectToFramework] exit 2012-11-27 12:02:23.186 hdiutil[23401:2803] [DIHelperProxy sendOperationToHelper] entry 2012-11-27 12:02:23.187 hdiutil[23401:2803] [DIHelperProxy sendOperationToHelper] starting operation with helper 2012-11-27 12:02:23.190 hdiutil[23401:2803] [DIHelperProxy sendOperationToHelper] exit 2012-11-27 12:02:23.194 hdiutil[23401:2803] [DIHelperProxy frameworkCallbackWithDictionary] entry status proc called: initialize Initializing… myStatusProc: returning 0 2012-11-27 12:02:23.199 hdiutil[23401:2803] [DIHelperProxy frameworkCallbackWithDictionary] exit 2012-11-27 12:02:23.201 diskimages-helper[23407:2503] updateImageAndDriveDictionaries: before update _imageOptions: { "enable-keychain" = 1; writeable = 0; } 2012-11-27 12:02:23.201 diskimages-helper[23407:2503] updateImageAndDriveDictionaries: _imageOptions: { "enable-keychain" = 1; "legacy-disabled" = 1; writeable = 0; } 2012-11-27 12:02:23.202 diskimages-helper[23407:2503] _driveOptions: { "auto-fsck" = 0; autodiskmount = 1; removable = 0; "unmount-timeout" = 0; } 2012-11-27 12:02:23.202 diskimages-helper[23407:2503] DIHelperAttach: performOperation: initializing framework 2012-11-27 12:02:23.202 diskimages-helper[23407:2503] { agent = hdiutil; "auto-fsck" = 0; "auto-fsck-failure-override-type" = callback; "auto-open-ro-root" = 0; "auto-open-rw-root" = 0; "auto-stretch" = 0; "bundlebs-checkpointing" = 0; "bundlebs-localcloseonflush" = 0; "bundlebs-localcloseonidle" = 0; "bundlebs-localcloseonsleep" = 0; "bundlebs-localfdcount" = 6; "bundlebs-remotecloseonflush" = 0; "bundlebs-remotecloseonidle" = 0; "bundlebs-remotecloseonsleep" = 0; "bundlebs-remotefdcount" = 3; "burn-apple-supported-devices-only" = 0; "burn-no-underrun-protection" = 0; "burn-synthesize-content" = 1; "bzip2-level" = 0; "callback-with-sla" = 1; debug = 1; "disable-encrypted-images" = 0; "disable-kernel-mounting" = 1; "disable-owners" = 0; "drive-options" = <62706c69 73743030 d0080000 00000000 01010000 00000000 00010000 00000000 00000000 00000000 0009>; "enable-owners" = 1; "filevault-default-case-sensitive-file-system" = "Case-sensitive Journaled HFS+"; "filevault-default-encryption-type" = "AES-128"; "filevault-default-file-system" = "Journaled HFS+"; "filevault-default-image-type" = SPARSEBUNDLE; "filevault-default-partition-type" = SPUD; "filevault-default-volume-name" = FileVault; "fixed-disk" = 1; "force-idme" = 0; "hfsplus-stretch-parameters" = { "hfsplus-stretch-allocation-block-size" = 4096; "hfsplus-stretch-allocation-file-size" = 8388608; "hfsplus-stretch-threshold" = 524288; }; "idle-timeout" = 15; "ifd-format" = UDZO; "ifd-ignore-io-errors" = 1; "ifd-segment-size" = 0; "iff-format" = UDZO; "iff-fs" = "HFS+"; "iff-layout" = SPUD; "iff-source-owners" = auto; "iff-spotlight-indexing" = 0; "iff-temp-sparse-band-size" = 20480; "iff-temp-use-rw-if-possible" = 1; "iff-usehelper" = 1; "ignore-bad-checksums" = 0; "image-options" = <62706c69 73743030 d101025f 100f6c65 67616379 2d646973 61626c65 6409080b 1d000000 00000001 01000000 00000000 03000000 00000000 00000000 00000000 1e>; "main-url" = "file://localhost/Volumes/netboot/Lion.nbi/Library.dmg"; "mount-attempted" = 1; "mount-nobrowse" = 1; "mount-point" = "/Volumes/"; "mount-private" = 0; "mount-requinetworking" = 1; "mount-type" = in; "nbi-spotlight-indexing" = 0; operation = DIHelperAttach; "progress-delay" = 5; "pthread-reader-cap" = 4; quiet = 0; "reauthenticate-upon-wake" = 1; "shadow-url" = "file://localhost/private/var/netboot/Library-Shadow"; "skip-auto-fsck-for-system-images" = 1; "skip-idme" = 1; "skip-idme-reveal" = 0; "skip-idme-trash" = 0; "skip-previously-verified" = 1; "skip-sla" = 0; "skip-verify" = 1; "skip-verify-locked" = 0; "skip-verify-remote" = 1; "sparsebundle-compactonidle" = 0; "suppress-uiagent" = 1; "unmount-timeout" = 0; "use-compressed-xml" = 0; "use-keychain" = 1; verbose = 0; "zlib-level" = 1; } DILoadDriver: checking for disk image driver DILoadDriver: DI_kextExists() returned 0x00000000 (0) DIIsInitialized: returning NO 2012-11-27 12:02:23.206 diskimages-helper[23407:2503] -checkForPreviouslyAttachedImage: entry 2012-11-27 12:02:23.206 diskimages-helper[23407:2503] imageURL file://localhost/Volumes/netboot/Lion.nbi/Library.dmg 2012-11-27 12:02:23.206 diskimages-helper[23407:2503] shadowURL file://localhost/private/var/netboot/Library-Shadow 2012-11-27 12:02:23.207 diskimages-helper[23407:2503] sectionStart (null) sectionLength (null) 2012-11-27 12:02:23.207 diskimages-helper[23407:2503] checkForPreviouslyAttachedImage: setting legacy-disabled to 1 DIIsInitialized: returning YES DIBackingStoreNewWithCFURL: entry with file://localhost/Volumes/netboot/Lion.nbi/Library.dmg skip-permissions-check: true legacy-disabled: true DIBackingStoreInstantiatorProbe: entry file://localhost/Volumes/netboot/Lion.nbi/Library.dmg skip-permissions-check: true legacy-disabled: true DIBackingStoreInstantiatorProbe: probing interface 0 CBSDBackingStore CBSDBackingStore::newProbe score 100 for file://localhost/Volumes/netboot/Lion.nbi/Library.dmg DIBackingStoreInstantiatorProbe: probing interface 1 CBundleBackingStore CBundleBackingStore::newProbe score -1000 for file://localhost/Volumes/netboot/Lion.nbi/Library.dmg DIBackingStoreInstantiatorProbe: probing interface 2 CRAMBackingStore CRAMBackingStore::probe: scheme "file": not ram: or ramdisk: scheme. CRAMBackingStore::probe: score -1000 for file://localhost/Volumes/netboot/Lion.nbi/Library.dmg DIBackingStoreInstantiatorProbe: probing interface 3 CCarbonBackingStore CCarbonBackingStore::newProbe: setting initial rval to +100 CCarbonBackingStore::newProbe score 100 for file://localhost/Volumes/netboot/Lion.nbi/Library.dmg DIBackingStoreInstantiatorProbe: probing interface 4 CDevBackingStore CDevBackingStore::newProbe: not /dev/disk or /dev/rdisk (/Volumes/netboot/Lion.nbi/Library.dmg).CDevBackingStore::newProbe score -1000 for DIBackingStoreInstantiatorProbe: probing interface 5 CCURLBackingStore CCURLBackingStore::probe: scheme is: file CCURLBackingStore::probe: not recognized URL scheme. CCURLBackingStore::probe: score -1000 for file://localhost/Volumes/netboot/Lion.nbi/Library.dmg DIBackingStoreInstantiatorProbe: probing interface 6 CVectonetworkingBackingStore CVectonetworkingBackingStore::newProbe not "vectonetworking" scheme. CVectonetworkingBackingStore::newProbe score -1000 for file://localhost/Volumes/netboot/Lion.nbi/Library.dmg DIBackingStoreInstantiatorProbe: selecting CBSDBackingStore DIBackingStoreNewWithCFURL: CBSDBackingStore CBSDBackingStore::setNoFollow: setting _noFollow to 0 DIBackingStoreNewWithCFURL: instantiator returned 0 DIBackingStoreNewWithCFURL: returning 0 2012-11-27 12:02:23.208 diskimages-helper[23407:2503] -checkForPreviouslyAttachedImage: resolving file://localhost/Volumes/netboot/Lion.nbi/Library.dmg returned 0 DIIsInitialized: returning YES DIBackingStoreNewWithCFURL: entry with file://localhost/private/var/netboot/Library-Shadow skip-permissions-check: true DIBackingStoreInstantiatorProbe: entry file://localhost/private/var/netboot/Library-Shadow skip-permissions-check: true DIBackingStoreInstantiatorProbe: probing interface 0 CBSDBackingStore CBSDBackingStore::newProbe score 1 for file://localhost/private/var/netboot/Library-Shadow DIBackingStoreInstantiatorProbe: probing interface 1 CBundleBackingStore CBundleBackingStore::newProbe score -1000 for file://localhost/private/var/netboot/Library-Shadow DIBackingStoreInstantiatorProbe: probing interface 2 CRAMBackingStore CRAMBackingStore::probe: scheme "file": not ram: or ramdisk: scheme. CRAMBackingStore::probe: score -1000 for file://localhost/private/var/netboot/Library-Shadow DIBackingStoreInstantiatorProbe: probing interface 3 CCarbonBackingStore CCarbonBackingStore::newProbe stat() failed. No such file or directory. CCarbonBackingStore::newProbe score -1000 for file://localhost/private/var/netboot/Library-Shadow DIBackingStoreInstantiatorProbe: probing interface 4 CDevBackingStore CDevBackingStore::newProbe: not /dev/disk or /dev/rdisk (/private/var/netboot/Library-Shadow).CDevBackingStore::newProbe score -1000 for DIBackingStoreInstantiatorProbe: probing interface 5 CCURLBackingStore CCURLBackingStore::probe: scheme is: file CCURLBackingStore::probe: not recognized URL scheme. CCURLBackingStore::probe: score -1000 for file://localhost/private/var/netboot/Library-Shadow DIBackingStoreInstantiatorProbe: probing interface 6 CVectonetworkingBackingStore CVectonetworkingBackingStore::newProbe not "vectonetworking" scheme. CVectonetworkingBackingStore::newProbe score -1000 for file://localhost/private/var/netboot/Library-Shadow DIBackingStoreInstantiatorProbe: selecting CBSDBackingStore DIBackingStoreNewWithCFURL: CBSDBackingStore DIBackingStoreNewWithCFURL: instantiator returned 2 DIBackingStoreNewWithCFURL: returning 2 DIResolveURLToBackingStore: unable to resolve to any backing store class. 2. 2012-11-27 12:02:23.208 diskimages-helper[23407:2503] -checkForPreviouslyAttachedImage: resolving shadow file://localhost/private/var/netboot/Library-Shadow returned 2 2012-11-27 12:02:23.208 diskimages-helper[23407:2503] DIHelperAttach: performOperation: resolving disk image DIIsInitialized: returning YES DIIsInitialized: returning YES DIBackingStoreNewWithCFURL: entry with file://localhost/Volumes/netboot/Lion.nbi/Library.dmg legacy-disabled: true writeable: false enable-keychain: true image-path: /Volumes/netboot/Lion.nbi/Library.dmg DIBackingStoreInstantiatorProbe: entry file://localhost/Volumes/netboot/Lion.nbi/Library.dmg legacy-disabled: true writeable: false enable-keychain: true image-path: /Volumes/netboot/Lion.nbi/Library.dmg DIBackingStoreInstantiatorProbe: probing interface 0 CBSDBackingStore CBSDBackingStore::newProbe score 100 for file://localhost/Volumes/netboot/Lion.nbi/Library.dmg DIBackingStoreInstantiatorProbe: probing interface 1 CBundleBackingStore CBundleBackingStore::newProbe score -1000 for file://localhost/Volumes/netboot/Lion.nbi/Library.dmg DIBackingStoreInstantiatorProbe: probing interface 2 CRAMBackingStore CRAMBackingStore::probe: scheme "file": not ram: or ramdisk: scheme. CRAMBackingStore::probe: score -1000 for file://localhost/Volumes/netboot/Lion.nbi/Library.dmg DIBackingStoreInstantiatorProbe: probing interface 3 CCarbonBackingStore CCarbonBackingStore::newProbe: setting initial rval to +100 CCarbonBackingStore::newProbe score 100 for file://localhost/Volumes/netboot/Lion.nbi/Library.dmg DIBackingStoreInstantiatorProbe: probing interface 4 CDevBackingStore CDevBackingStore::newProbe: not /dev/disk or /dev/rdisk (/Volumes/netboot/Lion.nbi/Library.dmg).CDevBackingStore::newProbe score -1000 for DIBackingStoreInstantiatorProbe: probing interface 5 CCURLBackingStore CCURLBackingStore::probe: scheme is: file CCURLBackingStore::probe: not recognized URL scheme. CCURLBackingStore::probe: score -1000 for file://localhost/Volumes/netboot/Lion.nbi/Library.dmg DIBackingStoreInstantiatorProbe: probing interface 6 CVectonetworkingBackingStore CVectonetworkingBackingStore::newProbe not "vectonetworking" scheme. CVectonetworkingBackingStore::newProbe score -1000 for file://localhost/Volumes/netboot/Lion.nbi/Library.dmg DIBackingStoreInstantiatorProbe: selecting CBSDBackingStore DIBackingStoreNewWithCFURL: CBSDBackingStore CBSDBackingStore::setPermission: opening /Volumes/netboot/Lion.nbi/Library.dmg CBSDBackingStore::OpenLockFriendly: mapping flags 0x00000000 -> 0x00000014 (locks are MANDATORY) CBSDBackingStore:OpenLockFriendly: could not open with lock 30 DIBackingStoreNewWithCFURL: instantiator returned 30 DIBackingStoreNewWithCFURL: returning 30 DIResolveURLToBackingStore: unable to resolve to any backing store class. 30. DIResolveURLToDiskImage: resolving backing store/file encoding failed. 30. 2012-11-27 12:02:23.211 hdiutil[23401:2803] [DIHelperProxy frameworkCallbackWithDictionary] entry status proc called: attach Attaching… Error 30 (Read-only file system). myStatusProc: returning 0 2012-11-27 12:02:23.227 hdiutil[23401:2803] [DIHelperProxy frameworkCallbackWithDictionary] exit 2012-11-27 12:02:23.228 hdiutil[23401:2803] [DIHelperProxy frameworkCallbackWithDictionary] entry status proc called: cleanup Finishing… myStatusProc: returning 0 2012-11-27 12:02:23.228 hdiutil[23401:2803] [DIHelperProxy frameworkCallbackWithDictionary] exit 2012-11-27 12:02:23.229 diskimages-helper[23407:2503] DIHelperAttach performOperation: returning 30 2012-11-27 12:02:23.229 diskimages-helper[23407:2503] -decrementBackgroundThreadCount: _backgroundThreadCount is now 0. 2012-11-27 12:02:23.229 diskimages-helper[23407:303] DIHelper _report_results: reporting { payload = { }; "result-code" = 30; } 2012-11-27 12:02:23.230 hdiutil[23401:2803] reportResultsToFramework: proxy has finished operation 2012-11-27 12:02:23.230 hdiutil[23401:2803] reportResultsToFramework: results are: { payload = { }; "result-code" = 30; } 2012-11-27 12:02:23.230 hdiutil[23401:2803] reportResultsToFramework: _threadResultsError is 30 2012-11-27 12:02:23.231 hdiutil[23401:2803] reportResultsToFramework: disconnecting from helper. 2012-11-27 12:02:23.231 diskimages-helper[23407:303] -setCanTerminate: main thread can exit 2012-11-27 12:02:23.332 hdiutil[23401:2803] [DIHelperProxy disconnectFromHelper] entry 2012-11-27 12:02:23.333 hdiutil[23401:2803] disconnectFromHelper: removing observers 2012-11-27 12:02:23.333 hdiutil[23401:2803] disconnectFromHelper: terminating proxy 2012-11-27 12:02:23.334 diskimages-helper[23407:303] DIHelper: terminateHelper: entry. 2012-11-27 12:02:23.334 hdiutil[23401:2803] disconnectFromHelper: terminated proxy 2012-11-27 12:02:23.335 hdiutil[23401:2803] [DIHelperProxy disconnectFromHelper] releasing helper 2012-11-27 12:02:23.335 hdiutil[23401:2803] [DIHelperProxy disconnectFromHelper] exit 2012-11-27 12:02:23.435 diskimages-helper[23407:303] [DIHelper frameworkConnectionDied] entry 2012-11-27 12:02:23.435 diskimages-helper[23407:303] [DIHelper frameworkConnectionDied] releasing connection 2012-11-27 12:02:23.435 diskimages-helper[23407:303] [DIHelper frameworkConnectionDied] releasing frameworkProxy 2012-11-27 12:02:23.435 diskimages-helper[23407:303] -DIHelperAgentMaster terminateUIAgentConnection. 2012-11-27 12:02:23.435 diskimages-helper[23407:303] [DIHelper frameworkConnectionDied] marking _frameworkDisconnected 2012-11-27 12:02:23.435 diskimages-helper[23407:303] [DIHelper frameworkConnectionDied] exiting 2012-11-27 12:02:24.232 hdiutil[23401:2803] [DIHelperProxy workerThread] removing NSConnectionDidDieNotification observers 2012-11-27 12:02:24.233 hdiutil[23401:2803] [DIHelperProxy workerThread] removing NSConnectionDidInitializeNotification observers 2012-11-27 12:02:24.234 hdiutil[23401:2803] [DIHelperProxy workerThread] removing NSTaskDidTerminateNotification observers 2012-11-27 12:02:24.234 hdiutil[23401:2803] [DIHelperProxy threadRunRunLoop] invalidating connection 2012-11-27 12:02:24.235 diskimages-helper[23407:303] DIHelper dealloc. 2012-11-27 12:02:24.234 hdiutil[23401:2803] [DIHelperProxy threadRunRunLoop] releasing connection 2012-11-27 12:02:24.235 diskimages-helper[23407:303] -DIHelperAgentMaster terminateUIAgentConnection. 2012-11-27 12:02:24.235 hdiutil[23401:2803] [DIHelperProxy workerThread] after running runloop 2012-11-27 12:02:24.235 diskimages-helper[23407:303] helper: child_after_exec returning 0 2012-11-27 12:02:24.235 hdiutil[23401:2803] [DIHelperProxy workerThread] waiting for task to terminate to avoid zombies 2012-11-27 12:02:24.236 hdiutil[23401:2803] [DIHelperProxy workerThread] releasing task 2012-11-27 12:02:24.236 hdiutil[23401:2803] [DIHelperProxy workerThread] exiting 2012-11-27 12:02:24.236 hdiutil[23401:707] [DIHelperProxy performOperationReturning] returning 30 2012-11-27 12:02:24.237 hdiutil[23401:707] DIHLDiskImageAttach: DIHelperProxy returned 30 2012-11-27 12:02:24.237 hdiutil[23401:707] [DIHelperProxy dealloc] DIHLDiskImageAttach() returned 30 hdiutil: attach failed - Read-only file system kyle:~ root# 

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  • 2 Solutions collect form web for “¿Por qué no puedo abrir files DMG que residen en un sistema de files NFS de solo lectura?”

    He estado interesado en esta pregunta desde noviembre de 2012 e incluso configuré una máquina virtual FreeNAS para reproducir el problema.

    Eventualmente me rendí, pero como la pregunta ha sido resucitada , compartiré lo que descubrí en ese momento y en las últimas horas (afortunadamente no eliminé la VM) y cuál es la causa de este problema. También encontré una solución.

    Mi configuration

    En primer lugar, esta es mi configuration de testing:

    • OS X 10.8.2 (lo siento, no 10.7.5 alnetworkingedor).

    • FreeNAS (FreeBSD 8.2-RELEASE-p1)

      enter image description here

      (La versión del OP es FreeBSD 8.2-RELEASE-p7 – No pude encontrar la misma versión).

    • Un sistema de files NAS en /mnt/raid :

      enter image description here

    • Un usuario llamado netboot :

      enter image description here

    • Un sistema de files AFP ( /mnt/raid/netboot ) exportado como netboot :

      enter image description here

      (Tenga en count que está configurado como de solo lectura).

    • Un sistema de files NFS (la misma ruta que el sistema de files AFP, para que coincida con la configuration del OP: /mnt/raid/netboot ):

      enter image description here

    AFP funciona, NFS no

    Monté el sistema de files de solo lectura AFP como usuario netboot usando Finder con K :

    enter image description here

    y montó un file de image DMG sin ningún problema:

     $ sudo rm /private/var/netboot/Library-Shadow $ sudo /usr/bin/hdiutil attach /Volumes/netboot/p7zip-9.04-0.i386.dmg -notremovable -shadow /private/var/netboot/Library-Shadow -owners on -noverify -noautofsck -nobrowse Password: /dev/disk3 Apple_partition_scheme /dev/disk3s1 Apple_partition_map /dev/disk3s2 Apple_HFS /Volumes/p7zip.pkg 

    Luego lo desmonté y monté el sistema de files NFS de solo lectura (también utilicé K ) y no pude montar el file de image DMG.

    Creo que el problema está registrado aquí:

     CBSDBackingStore::setPermission: opening /Volumes/netboot/Lion.nbi/Library.dmg CBSDBackingStore::OpenLockFriendly: mapping flags 0x00000000 -> 0x00000014 (locks are MANDATORY) CBSDBackingStore:OpenLockFriendly: could not open with lock 30 

    El error 30 significa (ver man 2 intro ):

    30 Sistema de files de solo lectura EROFS. Se intentó modificar un file o directory en un sistema de files que era de solo lectura en ese momento.

    No es de sorprender que sea, de hecho, un sistema de files de solo lectura, pero … cuando está montado sobre AFP funciona, ¿por qué?

    Porque la implementación de NFS de Apple tiene algunos problemas con el locking. Como se indica en esta publicación en gluster.org:

    OS X tiene una cantidad fenomenal de locking de files (algunos dirían, innecesariamente) y siempre ha sido muy sensible a la configuration de locking en los serveres NFS. Tanto es así que si elige aleatoriamente un server NFS en una gran empresa, el éxito real es bastante improbable.

    En mi configuration, el server NFS (es decir, la máquina virtual FreeNAS) de repente no respondía (desde /var/log/system.log de mi Mac):

     Mar 15 15:35:04 avallone.local rpc.lockd[8119]: Lockd got unexpected signal 20 Mar 15 15:35:04 avallone com.apple.launchd[1] (com.apple.lockd[8119]): Exited with code: 1 Mar 15 15:35:04 avallone com.apple.launchd[1] (com.apple.lockd): Throttling respawn: Will start in 10 seconds (...) Mar 15 15:35:07 avallone com.apple.launchd[1] (com.apple.statd[8121]): Exited with code: 1 Mar 15 15:35:07 avallone com.apple.launchd[1] (com.apple.statd): Throttling respawn: Will start in 10 seconds Mar 15 15:35:13 avallone kernel[0]: nfs server 172.16.54.186:/mnt/raid/netboot: lockd not responding Mar 15 15:35:13 avallone.local KernelEventAgent[72]: tid 00000000 received event(s) VQ_NOTRESP (1) Mar 15 15:35:13 avallone.local KernelEventAgent[72]: tid 00000000 type 'nfs', mounted on '/Volumes/netboot', from '172.16.54.186:/mnt/raid/netboot', not responding (...) Mar 15 15:35:34 avallone.local KernelEventAgent[72]: tid 00000000 unmounting 1 filesystems 

    La salida de sudo /usr/bin/hdiutil attach -debug /Volumes/netboot/p7zip-9.04-0.i386.dmg -notremovable -shadow /private/var/netboot/Library-Shadow -owners on -noverify -noautofsck -nobrowse estaba:

     CBSDBackingStore::setPermission: opening /Volumes/netboot/p7zip-9.04-0.i386.dmg CBSDBackingStore::OpenLockFriendly: mapping flags 0x00000000 -> 0x00000014 (locks are MANDATORY) CBSDBackingStore:OpenLockFriendly: could not open with lock 5 

    El error 5 significa (nuevamente desde el man 2 intro ):

    5 EIO error de input / salida. Se produjo algún error de input o salida física. Este error no se informará hasta una operación posterior en el mismo descriptor de file y puede perderse (por escrito) por cualquier error posterior.

    lo cual no es para nada sorprendente, el sistema de files NFS ya no está.

    Solución

    Una solución temporal (probado en OS X 10.8) es montar NFS con opciones nolocks,locallocks . Como se explica en la publicación de gluster.org ya mencionada:

    Afortunadamente, hay una solución: simplemente apague el locking de networking. Puede hacerlo agregando las opciones "nolocks, locallocks" en el campo de opciones avanzadas de la UI de assembly de Disk Utility NFS, pero esto es doloroso si hace muchas de ellas, y no ayuda en absoluto con / net. You can edit /etc/auto_master to add these options to the /net entry, but it doesn't affect other mounts – however I do recommend deleting the hidefromfinder option in auto_master. If you want to fix every automount, edit /etc/autofs.conf and search for the line that starts with AUTOMOUNTD_MNTOPTS=. These options get applied on every mount. Add nolocks,locallocks and your world will be faster and happier after you reboot.

    I manually mounted 172.16.54.186:/mnt/raid/netboot and it worked flawlessly:

     $ sudo rm /private/var/netboot/Library-Shadow $ sudo mount -o nolocks,locallocks,ro 172.16.54.186:/mnt/raid/netboot /tmp/mnt $ sudo /usr/bin/hdiutil attach /tmp/mnt/p7zip-9.04-0.i386.dmg -notremovable -shadow /private/var/netboot/Library-Shadow -owners on -noverify -noautofsck -nobrowse /dev/disk6 Apple_partition_scheme /dev/disk6s1 Apple_partition_map /dev/disk6s2 Apple_HFS /Volumes/p7zip.pkg 

    I also edited /etc/auto_master like this:

     +auto_master # Use directory service #/net -hosts -nobrowse,hidefromfinder,nosuid /net -hosts -nosuid,nolocks,locallocks /home auto_home -nobrowse,hidefromfinder /Network/Servers -fstab /- -static 

    stopped and started automountd and autofsd :

     $ sudo launchctl unload /System/Library/LaunchDaemons/com.apple.automountd.plist $ sudo launchctl unload /System/Library/LaunchDaemons/com.apple.autofsd.plist $ sudo launchctl load /System/Library/LaunchDaemons/com.apple.autofsd.plist $ sudo launchctl load /System/Library/LaunchDaemons/com.apple.automountd.plist 

    and worked like a charm:

     $ cd /net/172.16.54.186/mnt/raid/netboot $ ls Network Trash Folder Temporary Items p7zip-9.04-0.i386.dmg $ sudo rm /private/var/netboot/Library-Shadow $ sudo /usr/bin/hdiutil attach p7zip-9.04-0.i386.dmg -notremovable -shadow /private/var/netboot/Library-Shadow -owners on -noverify -noautofsck -nobrowse /dev/disk7 Apple_partition_scheme /dev/disk7s1 Apple_partition_map /dev/disk7s2 Apple_HFS /Volumes/p7zip.pkg 

    hdiutil attach -readonly …

    For an image that's stonetworking on a read-only file system, I reckon that -readonly should be used at time of attachment.

    (The AFP case may be exceptional.)


    Considering the down vote and the comment from @Josh: I misunderstood the -shadow part of the man page for hdiutil :

    … allows read-only images to be attached read/write …

    – I imagined that -shadow could override -readonly .

    Loving Apple Products like poisoning (iPhone, iPad, iMac, Macbook, iWatch).