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GRT Backup failing with  '-546 The log file sector size does not match the sector size of the current volumn.' error

Posted on 2011-03-08
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Hi,

My database backups have started to fail with Backup Exec 12.5 on SBS 2008.

The full error is  e00002f7 - Cannot extract mailbox messages from the Exchange backup. Review the job log for more information.

In the job log, it says: For additional information regarding this error refer to link V-79-57344-759
  V-79-57344-759 - Unable to complete the operation for the selected resource using the specified options.  The following error was returned when opening the Exchange Database file:  '-546 The log file sector size does not match the sector size of the current volumn. '

All the sectors in question (C Drive, D Drive, B2D Drive) are 4096K. I'm not sure what the problem is. The backup drive is a 3TB USB3 Drive from Western Digital. I'm wondering if it's flaky, but the error has been consistent over the past few days, and other backups are working.
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Question by:jennx
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Cliff Galiher earned 2000 total points
ID: 35074523
Pretty common with 3TB drives and Server 2008/Vista. Short answer is that drives above 2TB are using workarounds to present their space to the OS. MS added additional support to 2008 R2 and Win7, but that hotfix was not backported. I simply never recommend using 3TB drives.

A common thing you'll see is that the drive works at first (as the actual sectors being accessed are below the 2TB threshold) but as the snapshot/image gets larger, the merge process fails because the OS is now trying to access the high sectors and the compatibility issue arises. So even if your backups were working before with this drive, it doesn't necessarily indicate that the drive is fully compatible.

I'd try using a different drive temporarily and see if your problem is alleviated.

-Cliff
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Author Comment

by:jennx
ID: 35084869
Interesting. What happens if I put two partitions on the 3TB drives?
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LVL 59

Expert Comment

by:Cliff Galiher
ID: 35087923
Doesn't matter. It is a block-level issue and a compatibility problem with the OS and how some chipset drivers (including USB) try to present drives > 2TB.

-Cliff
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