Q: Time machine / Spinning wheel
Hi,
When Time Machine starts backing up, my computer keeps freezing and I see a spinning wheel. All the applications become slow or unresponsive. After a few hours, the backup seems to complete successfully. When no backup is running, the computer behaves normally. I have not been able to figure out what the problem is.
OSX: El Capitan 10.11.6 (15G31)
MacBook Pro (Retina, 13-inch, Early 2013)
Size of data on hard-drive ~ 220 GB
Backup location: time capsule; connected through wireless connection; size of data for backup ~ 380 GB; available size on time capsule ~ 1.6 TB.
Internal drive: APPLE SSD SM256E Media, 251 GB SATA
I have checked the integrity of the file system for my computer and the time capsule (using First Aid in Disk Utility). No problem was found. The hard drive (FileVault) and backup are encrypted.
MacBook Pro with Retina display, OS X El Capitan (10.11.6)
Posted on Aug 22, 2016 4:38 PM
Some more information on this.
I excluded /.DocumentRevisions-V100 from the Time Machine backups.
That did the trick. The backup now progresses quickly and I no longer have error messages in the console.
I looked again at the old error messages in the console. There is a clear pattern.
It starts with:
backupd async. scan: #'/Volumes/Time Machine Backups/Backups.backupdb/Mac Pro 13/2016-08-25-170327/Macintosh HD/.DocumentRevisions-V100/PerUID/[...]
This is a file inside the directory /Macintosh HD/.DocumentRevisions-V100. I removed the complete file name above.
Then this is followed by one or several of:
/BuildRoot/Library/Caches/com.apple.xbs/Sources/AppleFSCompression_kexts/AppleFS Compression-81.20.2/Compressors/Dataless/compressorType5Kext.c:545: Error: post_request error for /[...]
decmpfs.c:1385:decmpfs_read_compressed: /[...]
for the same file. It's basically trying to perform some operation on the file, failing and attempting again.
This is repeated for a large number of files in /.DocumentRevisions-V100.
This is what was causing the machine to freeze and the backups to slow down to a crawl.
Posted on Aug 29, 2016 9:33 AM

