Asset ID:	1-77-1019221.1
Update Date:	2011-02-18
Keywords:

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Solution Type  Sun Alert Sure

Solution  1019221.1 :   VTL Plus 1.0/2.0 with Software Compression May Experience Data Integrity Issues  


PreviouslyPublishedAs
237144

Bug Id
<SUNBUG: 6682896>

Product
Sun StorageTek Virtual Tape Library Plus Storage Appliance 1.0
Sun StorageTek Virtual Tape Library Plus Storage Appliance 2.0

Date of Workaround Release
24-Apr-2008

Date of Resolved Release
08-May-2008

VTL Plus 1.0/2.0 with Software Compression May Experience Data Integrity Issues

1. Impact

Sun Virtual Tape Library Plus 1.0/2.0 (VTL) is unable to restore or export data from a virtual tape, which may cause data integrity issues.

2. Contributing Factors

This issue can occur in the following releases:

SPARC Platform

• Sun Virtual Tape Library Plus 1.0, 2.0 for Solaris 10

x86 Platform

• Sun Virtual Tape Library Plus 1.0, 2.0 for Solaris 10
  

Note:  VTL Plus 1.0 and VTL Plus 2.0 run on Solaris 10 only.

1. VTL Plus 1.0 models are: VTL1140, VTL2540, VTL3540, and VTL Value
2. VTL Plus 2.0 models are: VTL1200, VTL1202, VTL2600 and VTL3600

For VTL Plus 1.0, this issue was introduced in Build1323 with patch 08 (update-vt132308solaris10) and occurs when utilizing software compression. Data block size was between 240K and 256K, and the data is highly incompressible(less than 1.5 to 1). This includes VTL Plus1.0 with patch 09, patch 10, patch 11, and patch 12.

For VTL Plus 2.0, this issue was introduced at the initial install level and occurs when utilizing software compression. Data block size was between 240K and 256K, and the data is highly incompressible (less than1.5 to 1). This includes VTL Plus 2.0 with patch 01 and patch 02 installed.

3. Symptoms

A media read error will occur during restore or export.

Error messages would appear similar to the following example:

4. Workaround

To work around this issue, disable software compression or write block sizes smaller than 240K from the backup application.

5. Resolution

This issue is adressed in the following releases, available from Sun Support:

• For VTL Plus 1.0: Patch 13 revision update-vt1132309solaris10

Note: Patches 09, 10, 11 and 12 are pre-requisites for Patch 13 and must be applied in order before applying Patch 13.

• For VTL Plus 2.0: Patch 03 revision update-vt159003solaris10

Note: Patches 01 and 02 are pre-requisites for Patch 03 and must be applied in order before applying Patch 03.

This Sun Alert notification is being provided to you on an "AS IS" basis. This Sun Alert notification may contain information provided by third parties. The issues described in this Sun Alert notification may or may not impact your system(s). Sun makes no representations, warranties, or guarantees as to the information contained herein. ANY AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN. This Sun Alert notification contains Sun proprietary and confidential information. It is being provided to you pursuant to the provisions of your agreement to purchase services from Sun, or, if you do not have such an agreement, the Sun.com Terms of Use. This Sun Alert notification may only be used for the purposes contemplated by these agreements.

Copyright 2000-2008 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, CA 95054 U.S.A. All rights reserved.

Modification History
08-May-2008: Updated Resolution section: RESOLVED

Internal Comments
Please send technical questions to the following email:
sunalert-tech-questions@sun.com
and CC the following persons:
Internal Contributor/Submitter
Internal Eng Responsible Engineer
Internal Services Knowledge Engineer


Customers using software compression on VTL Plus 1.0 with Patch 09 or VTL Plus 2.0 are the "at risk" customers.

Support: these patches are availalbe on the "Uniform Software Repository" page at:

http://dlrequest.sfbay.sun.com:88/usr/search

Under VTL Plus, pages 2 and 3.


For VTL Plus 1.0:



Patch 13 revision update-vt1132309solaris10



Note: Patches 09, 10, 11 and 12
are pre-reqs for Patch 13 and must be applied in order before applying
Patch 13.



For VTL Plus 2.0:



Patch 03 revision update-vt159003solaris10



Note: Patches 01 and 02 are
pre-reqs for Patch 03 and must be applied in order before applying
Patch 03.

Internal Contributor/submitter
Greg.Fuller@sun.com

Internal Eng Responsible Engineer
Dan.spratt@sun.com

Internal Services Knowledge Engineer
david.mariotto@sun.com

Internal Eng Business Unit Group
NWS (Network Storage)

Internal Sun Alert & FAB Admin Info
24-Apr-2008, david m: review completed, problems with IBIS, send to publish
21-Apr-2008, david m: draft created, sent for review


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