Freezing/crash of iMac under Snow Leopard when backup with Time Machine

Hi!

The backup on my external hard drive with Time Machine cannot be completed.

After few ten Go out of 360Go the backup stops suddenly and the computer freezes/crashes.

I have got an iMac Intel Core 2 Duo with Snow Leopard 10.6.8 − 64 bit. The external hard drive is a LaCie 500Go.

Also, backups for another Apple computer can be done with this LaCie external drive. So, it is not the cause of the freezing/crash of the iMac.

I tried to solve this problem applying the following steps:

1- I started with the installation disk.

2- I repaired the internal iMac drive and the permissions with the Disk Utilities soft on the installation disk. All was OK.

3- The LaCie drive was erased, formatted again with one GUID partition (500Go) and the disk verified. All was OK.

4- I re-install the OS with the installation disk -> 10.6 Snow Leopard

5- Updates to 10.6.8, etc… security update 2012-004 and the 13th Java update to v1.6.

6- I deleted in the folder /Library/Preferences the file com.apple.TimeMachine.plist

7- I deleted the file com.apple.finder.plist in the administrator account Preferences folder.

8- The iMac was shutdowned as well as the external LaCie drive.

9- I restarted and changed the name of the external LaCie drive.

10- I choose the LaCie backup drive with Preferences System > Time Machine with right exclusions.

Unfortunately, the problem remained and the backup was again unsuccessful followed by another freezing/crash of the iMac.

So how to solve this problem?

Here is what I obtained from the system.log with the Console utility (crash/freezing at: 10:48):

=============================================================================== ==============================

Tue 4 09:58:24 imac com.apple.backupd[233]: Starting standard backup

Tue 4 09:58:24 imac com.apple.backupd[233]: Backing up to: /Volumes/LaCie/Backups.backupdb

Tue 4 09:58:24 imac com.apple.backupd[233]: Ownership is disabled on the backup destination volume. Enabling.

Tue 4 09:58:25 imac com.apple.backupd[233]: Backup content size: 343.5 GB excluded items size: 2.3 GB for volume iMac

Tue 4 09:58:25 imac com.apple.backupd[233]: No pre-backup thinning needed: 409.52 GB requested (including padding), 465.02 GB available

Tue 4 09:58:25 imac com.apple.backupd[233]: Waiting for index to be ready (101)

Tue 4 09:58:25 imac mds[40]: (Normal) DiskStore: Creating index for /Volumes/LaCie/Backups.backupdb

Tue 4 10:00:32 imac com.apple.backupd[233]: SystemFlippers: didn't consume all data for vers ID 1 (pBase = 0x10083f704, p = 0x10083f70c, pEnd = 0x10083f70d)

Tue 4 10:00:32 imac com.apple.backupd[233]: SystemFlippers: didn't consume all data for vers ID 1 (pBase = 0x10101b304, p = 0x10101b30c, pEnd = 0x10101b30d)

Tue 4 10:00:33 imac com.apple.backupd[233]: SystemFlippers: didn't consume all data for vers ID 1 (pBase = 0x1007c6f94, p = 0x1007c6f9c, pEnd = 0x1007c6f9d)

Tue 4 10:07:49 imac /System/Library/CoreServices/CCacheServer.app/Contents/MacOS/CCacheServer[202]: No valid tickets, timing out

Tue 4 10:14:53 imac mdworker[242]: multibyte IDs are unsupported.

Tue 4 10:17:05 imac backupd[233]: CFPropertyListCreateFromXMLData(): Old-style plist parser: missing semicolon in dictionary.

Tue 4 10:17:05 imac mdworker[243]: CFPropertyListCreateFromXMLData(): Old-style plist parser: missing semicolon in dictionary.

Tue 4 10:22:00 imac com.apple.backupd[233]: SystemFlippers: didn't consume all data for vers ID 1 (pBase = 0x10377e518, p = 0x10377e556, pEnd = 0x10377e557)

Tue 4 10:22:01 imac com.apple.backupd[233]: SystemFlippers: didn't consume all data for vers ID 1 (pBase = 0x10393e518, p = 0x10393e556, pEnd = 0x10393e557)

Tue 4 10:30:38 imac mdworker[242]: Corrupt JPEG data: 1 extraneous bytes before marker 0xd9

Tue 4 10:30:38 imac mdworker[242]: JPEG datastream contains no image

Tue 4 10:30:39 imac mdworker[242]: Corrupt JPEG data: 1 extraneous bytes before marker 0xd9

Tue 4 10:30:39 imac mdworker[242]: JPEG datastream contains no image

Tue 4 10:32:10 imac mdworker32[452]: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.

Tue 4 10:38:16 imac mdworker[243]: CFPropertyListCreateFromXMLData(): Old-style plist parser: missing semicolon in dictionary.

Tue 4 10:38:16 imac mdworker[243]: CFPropertyListCreateFromXMLData(): Old-style plist parser: missing semicolon in dictionary.

=============================================================================== ==============================

Waiting for a solution....

Bye

JacRb