Agent for Microsoft hyper-v Server Granular Restore (GRT) Backups to tape can fail if multiple jobs run at a time
| Article:TECH158608 | | | Created: 2011-04-22 | | | Updated: 2011-08-01 | | | Article URL http://www.symantec.com/docs/TECH158608 |
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Problem
Agent for Microsoft hyper-v Server Granular Restore (GRT) Backups to tape can fail if multiple jobs run at a time.
After the job failures, the Hyper-V host server may stop with 0x000000c2 - BAD_POOL_CALLER.
Error
V-79-57344-33967 - Directory not found. Cannot backup directory \zzzVirtApp000zzz and its subdirectories.
V-79-57344-65247 - Error. Cannot backup directory \zzzVirtApp000zzz and its subdirectories.
Final error: 0xe00084af - The directory or file was not found, or could not be accessed.
Final error: 0xe000fedf - A failure occurred reading an object.
Cause
When performing GRT enabled backup jobs to tape, beremote mounts the guest images on a temporary folder. If the mount processings start at a time, beremote will use the same mount point incorrectly.
In an instance of debug log of bremote below, head of the lines [8876] is a thread for job1. [8288] is a thread for job2. Both threads use the same mount point D:\TEMP\Backup Exec\MP00.
[8876] 04/15/11 00:24:28 [mounter] - VDiskMounter::RecurseGuestVolumeMountPoints: "D:\TEMP\Backup Exec\MP00\C\" is volume "\\?\Volume{520f637d-f202-11df-916c-1cc1de094421}\"
[8876] 04/15/11 00:24:28 [mounter] - VDiskMounter::RecurseGuestVolumeMountPoints: "D:\TEMP\Backup Exec\MP00\D\" is volume "\\?\Volume{520f6384-f202-11df-916c-1cc1de094421}\"
[8288] 04/15/11 00:24:47 [mounter] - VDiskMounter::RecurseGuestVolumeMountPoints: "D:\TEMP\Backup Exec\MP00\C\" is volume "\\?\Volume{520f62fe-f202-11df-916c-1cc1de094421}\"
[8288] 04/15/11 00:24:47 [mounter] - VDiskMounter::RecurseGuestVolumeMountPoints: "D:\TEMP\Backup Exec\MP00\D\" is volume "\\?\Volume{520f6306-f202-11df-916c-1cc1de094421}\"
This does not occur with backup-to-disk. Separate IMG folders under the backup-to-disk are used for each jobs on the media server when using backup-to-disk.
Solution
Do not run GRT enabled backup jobs which are targeted to tapes concurrently.
For example when perform two jobs concurrently:
- Job1 targets a tape.
- Job2 targets backup-to-disk and then duplicate it to tape.
Symantec Corporation has acknowledged that the above-mentioned issue is present in the current version(s) of the product(s) mentioned at the end of this article. Symantec Corporation is committed to product quality and satisfied customers.
NOTE:
Customers experiencing this issue are encouraged to contact Symantec Technical Support as data is still being collected to assist in resolving this issue
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|
| Source | UMI |
| Value | V-79-57344-33967 |
| Description | Directory not found. Cannot backup directory \zzzVirtApp000zzz and its subdirectories. |
| Source | UMI |
| Value | V-79-57344-65247 |
| Description | Final error: 0xe00084af - The directory or file was not found, or could not be accessed.
|
| Source | ETrack |
| Value | 2359812 |
Article URL http://www.symantec.com/docs/TECH158608
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