VMware Backups and Duplication jobs to a Deduplication Pool is failing with Status 84 on VMs with many small files

Article:TECH138077  |  Created: 2010-08-19  |  Updated: 2013-02-27  |  Article URL http://www.symantec.com/docs/TECH138077
Article Type
Technical Solution



Issue



When performing a backup or duplication of a Virtual Machine that is heavily fragmented with a lot of small files, the Data Object (DO) size can grow too large and cause the backup to fail.  The large DO size might be due to many small segments scattered all over the disk.  Both Backups and Duplication job to PureDisk storage may fail for a large number of small files. This failure may occur if the storage unit maximum fragment is at the default setting.


Error



Messages similar to the following may appear in the NetBackup job details:
2/12/2013 2:33:20 AM - Critical bpdm(pid=25204) Storage Server Error: (Storage server: PureDisk: msdp.symantecs.org) async_get_job_status: Replication started but failed to complete successfully: __process_batch: CRStoreDO failed: broken pipe, DO fingerprint d6f2521a5c66c54225ecd6a4c92. Look at the replication logs on the source storage server for more information. V-454-105
2/12/2013 2:33:22 AM - Critical bpdm(pid=25204) sts_copy_extent failed: error 2060014 operation aborted
2/12/2013 2:33:22 AM - end writing; write time: 3:39:53
2/12/2013 2:33:39 AM - Error bpduplicate(pid=5300) host msdp.symantecs.org backup id msdp.symantecs.org_1360303271 optimized duplication failed, media write error (84).
2/12/2013 2:33:39 AM - Info msdp.symantecs.org(pid=25204) StorageServer=PureDisk:msdp.symantecs.org; Report=PDDO Stats for (msdp.symantecs.org): scanned: 0 KB, CR sent: 0 KB, CR sent over FC: 0 KB, dedup: 0.0%, cache disabled
2/12/2013 2:33:40 AM - Error bpduplicate(pid=5300) Duplicate of backupid msdp.symantecs.org_1360303271 failed, media write error (84).
2/12/2013 2:33:40 AM - Error bpduplicate(pid=5300) Status = no images were successfully processed.
2/12/2013 2:33:40 AM - end Duplicate; elapsed time: 3:41:03 media write error(84)

Messages similar to the following also may appear in a log file on the PureDisk content router that processed the duplication operation. The log file resides in a directory that corresponds to the connection to the content router for the duplication operation. The name of the directory is the NetBackup storage server IP address, and it resides in the /Storage/log/spoold directory on the content router.
spad/Store/2/266020624-1360833685.log:July 14 04:12:03 ERR [1081665856]: 25112: DO: DO 065ab494d80277148c559071d007bde1: DO record size of 378652257 bytes is larger than the maximum allowed size of 335544320 bytes: DO has too many segments
spad/Store/2/266020624-1360833685.log:February 14 04:12:03 ERR [1081665856]: 8413608: Store terminated due to a local processing error at: Sun Jul 14 04:12:03 2013


Environment



VMware backups/duplication to Media Server Deduplication Engine (MSDE) and/or PureDisk Deduplication Option(PDDO)


Solution



To resolve this problem, reduce the fragment size of the NetBackup storage unit that represents the PureDisk storage. Depending on the source storage content, you may have to reduce the fragment size significantly.


Supplemental Materials

SourceError Code
Value84
Description

media write error


SourceETrack
Value2013001
Description

Backups fail with status 84.



Article URL http://www.symantec.com/docs/TECH138077


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