Sun Storage 7000 Unified Storage System: NDMP SCSI Tape performance degradation

Asset ID:	1-72-1214656.1
Update Date:	2010-09-23
Keywords:

Solution Type Problem Resolution Sure

Solution 1214656.1 : Sun Storage 7000 Unified Storage System: NDMP SCSI Tape performance degradation

Applies to:

Sun Storage 7110 Unified Storage System - Version: Not Applicable and later   [Release: NA and later ]
Sun Storage 7210 Unified Storage System - Version: Not Applicable and later    [Release: NA and later]
Sun Storage 7310 Unified Storage System - Version: Not Applicable and later    [Release: NA and later]
Sun Storage 7410 Unified Storage System - Version: Not Applicable and later    [Release: NA and later]
Information in this document applies to any platform.

Symptoms

If your hardware includes SCSI tape connected to the Sun 7000 unified storage and if you are running the software version 2010.Q1.0.*, you will experience a slow tape read or write performance, and thus the backup and restore may be slower as well.

Use the following steps to check.

BUI Status/NDMP can tell you the inquiry strings of the library/tape drive, so you know the make/model.

Also, you can check BUI Maintenence/Hardware to find out if you have a FC card or a SCSI card in the chassis.

BUI Analytics provides NDMP Bytes/Sec transferred to/from Tape, can show you the tape performance. If the tape performance is around 2mbps then you are hitting this issue.

Cause

This is due to a software bug.
<SUNBUG: 6932154>

Solution

The above bug has been fixed in 2010.Q1.1.0 software release, a software upgrade to the latest released is required to resolve this issue.

References

<BUG:6932154> - WCREG14:ADD MEMBER NOTIFICATION- UNABLE TO ADD COMMENTS

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