問題

n個月前MacOS升級到High Sierra 10.13之後Time Capsule（時間機器 !H_P?）就沒備份成功過。 第一次備份總是會等了很久之後顯示失敗。

翻查log

在Terminal輸入以下可以檢視Time Capsule的記錄

clear; printf '\e[3J' && log show --predicate 'subsystem == "com.apple.TimeMachine"' --info --last 24h | grep -F 'eMac' | grep -Fv 'etat' | awk -F']' '{print substr($0,1,19), $NF}'
 

結果顯示

2018-09-13 22:49:47  Maximum urgency thinning requested!
2018-09-13 22:49:47  Completed thinning of snapshots on disk '/' in 0.0 seconds - current free space: 3.17 GB（3,167,989,760 位元組）, target free space: 12.87 GB（12,872,359,936 位元組）, initial free space: 3.17 GB（3,167,989,760 位元組）, urgency: 4, remaining
 
 snapshots: (
2018-09-13 22:49:50  Starting age based thinning of Time Machine local snapshots on disk '/'
2018-09-13 22:49:50  Starting space based thinning of purgeable local snapshots on disk '/' - current free space: 3.06 GB（3,062,710,272 位元組）, target free space: 12.77 GB（12,767,080,448 位元組）, initial free space
 
: 3.06 GB（3,062,710,272 位元組）, urgency: 3
2018-09-13 22:49:50  Completed thinning of snapshots on disk '/' in 0.0 seconds - current free space: 3.06 GB（3,062,710,272 位元組）, target free space: 12.77 GB（12,767,080,448 位元組）, initial free space: 3.06 GB（3,062,710,272 位元組）, urgency: 3, remaining snapshots: (
2018-09-13 22:50:32  Checking for runtime corruption on /dev/disk2s2
2018-09-13 22:50:48  Disk image /Volumes/Data/MBP.sparsebundle mounted at: /Volumes/時間機器備份
2018-09-13 22:50:51  Backing up to /dev/disk2s2: /Volumes/時間機器備份/Backups.backupdb
2018-09-13 22:50:51  Failed to remove attribute 'com.apple.backupd.SnapshotVolumeFSEventStoreUUID' from 'file:///', error: Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"
2018-09-13 22:50:51  Failed to remove attribute 'com.apple.backupd.SnapshotVolumeLastFSEventID' from 'file:///', error: Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"
2018-09-13 22:50:51  Failed to remove attribute 'com.apple.backupd.SnapshotVolumeUUID' from 'file:///', error: Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"
2018-09-13 22:50:51  Failed to remove attribute 'com.apple.backupd.PreviousSnapshotVolumeUUID' from 'file:///', error: Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"
2018-09-13 22:50:51  Failed to remove attribute 'com.apple.backupd.PreviousSnapshotVolumeName' from 'file:///', error: Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"
2018-09-13 22:50:51  Failed to remove attribute 'com.apple.backupd.VolumeBytesUsed' from 'file:///', error: Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"
2018-09-13 22:50:51  Failed to remove attribute 'com.apple.backupd.VolumeIsCaseSensitive' from 'file:///', error: Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"
2018-09-13 22:50:51  Failed to remove attribute 'com.apple.backupd.fstypename' from 'file:///', error: Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"
2018-09-13 22:50:51  Failed to remove attribute 'com.apple.backupd.VolumeIsEncrypted' from 'file:///', error: Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"
2018-09-13 22:50:51  Failed to write unlock record UUIDs as extended attribute for disk '/', error: Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"
2018-09-13 22:50:51  Failed to create APFS snapshot with name 'com.apple.TimeMachine.2018-09-13-225051' on volume '/', error: Error Domain=NSPOSIXErrorDomain Code=28 "No space left on device"
2018-09-13 22:50:51  Failed to create local snapshots
2018-09-13 22:50:51  Failed to create or mount stable snapshot.
2018-09-13 22:50:55  Starting age based thinning of Time Machine local snapshots on disk '/'
2018-09-13 22:50:55  Starting space based thinning of purgeable local snapshots on disk '/' - current free space: 4.33 GB（4,330,475,520 位元組）, target free space: 14.82 GB（14,817,637,171 位元組）, initial free space: 4.33 GB（4,330,475,520 位元組）, urgency: 1
2018-09-13 22:50:55  Completed thinning of snapshots on disk '/' in 0.0 seconds - current free space: 4.33 GB（4,330,475,520 位元組）, target free space: 14.82 GB（14,817,637,171 位元組）, initial free space: 4.33 GB（4,330,475,520 位元組）, urgency: 1, remaining snapshots: (
2018-09-13 22:50:57  Starting age based thinning of Time Machine local snapshots on disk '/'
2018-09-13 22:50:57  Starting space based thinning of purgeable local snapshots on disk '/' - current free space: 4.28 GB（4,279,517,184 位元組）, target free space: 14.67 GB（14,674,322,227 位元組）, initial free space: 4.28 GB（4,279,517,184 位元組）, urgency: 2
2018-09-13 22:50:57  Completed thinning of snapshots on disk '/' in 0.0 seconds - current free space: 4.28 GB（4,279,517,184 位元組）, target free space: 14.67 GB（14,674,322,227 位元組）, initial free space: 4.28 GB（4,279,517,184 位元組）, urgency: 2, remaining snapshots: (
2018-09-13 22:50:59  Backup failed with error 50: 50
2018-09-13 22:51:02  Starting age based thinning of Time Machine local snapshots on disk '/'
2018-09-13 22:51:02  Starting space based thinning of purgeable local snapshots on disk '/' - current free space: 4.36 GB（4,358,701,056 位元組）, target free space: 12.87 GB（12,871,098,368 位元組）, initial free space: 4.36 GB（4,358,701,056 位元組）, urgency: 3
2018-09-13 22:51:02  Completed thinning of snapshots on disk '/' in 0.0 seconds - current free space: 4.36 GB（4,358,701,056 位元組）, target free space: 12.87 GB（12,871,098,368 位元組）, initial free space: 4.36 GB（4,358,701,056 位元組）, urgency: 3, remaining snapshots: (
2018-09-13 22:51:27  Failed to eject volume /Volumes/時間機器備份 (FSVolumeRefNum: -157; status: -47; dissenting pid: 0)
2018-09-13 22:51:27  Failed to eject Time Machine disk image: /Volumes/Data/MBP.sparsebundle

看來是許可權問題了

解決辦法

想不到居然是Spotlight的問題，那就先關掉

sudo mdutil -a -i off

備份成功之後再重啟Spotlight

sudo mdutil -a -i on

參考

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