Sun Microsystems, Inc.  Sun System Handbook - ISO 4.1 October 2012 Internal/Partner Edition
   Home | Current Systems | Former STK Products | EOL Systems | Components | General Info | Search | Feedback

Asset ID: 1-77-1019221.1
Update Date:2012-07-31
Keywords:
Solution Type  Sun Alert Sure

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

Related Items 
    

  • Sun StorageTek VTL Plus Storage Appliance
    •  
Related Categories 
    

  • PLA-Support>Sun Systems>Sun_Other>Sun Collections>SN-OTH: Sun Alert
    •  
  • .Old GCS Categories>Sun Microsystems>Sun Alert>Criteria Category>Data Loss
    •  
  • .Old GCS Categories>Sun Microsystems>Sun Alert>Release Phase>Resolved
    •  

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



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:



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. 

  2. VTL Plus 2.0 models are: VTL1200, VTL1202, VTL2600 and VTL3600
    3. 


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:




Feb 28 04:32:10 'server' genunix: [ID
459543 kern.notice]

<6>[fffffe8001ebac80] TLE_ERROR:

READ:Tape:10061, Decompression failed -6, CompSize 262081, ActualSize

262144, RetSize 5

Feb 28 04:32:10 'server' genunix: [ID 459543 kern.notice]

<6>[fffffe8001ebac80] TLE_ERROR: 10046: Read

Block Failed, Tape -89 1199488, THL 262144, CurBlockSize -2053872248





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.


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


Patches are availalbe at:

https://sac.us.oracle.com/download/index.html



For VTL Plus 1.0:

Patch 13 revision update-vt1132309solaris10

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

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



Modification History:

31-Jul-2012: Change patch downolad location, fix other formatting issues



Attachments

This solution has no attachment


















       

Copyright © 2012 Sun Microsystems, Inc.  All rights reserved.

 Feedback