APAR status
Closed as new function.
Error description
To add Logical Block Protection support for IBM tape devices
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All Tivoli Storage Manager server users. * **************************************************************** * PROBLEM DESCRIPTION: See ERROR DESCRIPTION. * **************************************************************** * RECOMMENDATION: This feature is currently projected to be * * in levels 6.2.4 and 6.3.1. Note that this * * is subject to change at the discretion of * * IBM. * **************************************************************** To enable logical block protection, specify a value of READWRITE or WRITEONLY for the LBPROTECT parameter on the DEFINE DEVCLASS or UPDATE DEVCLASS commands for the LTO or 3592 device types. LBProtect specifies whether Logical Block Protection is used to ensure the integrity of data stored on tape. When LBPROTECT is set to READWRITE or to WRITEONLY, the server uses feature of the tape drive for logical block protection feature and generates CRC protection information for each data block written on tape. The server also validates the CRC protection information when data is read back from tape. The default is NO. The following values are possible: READWrite - Specifies that logical block protection is enabled in the server and the tape drive for both read and write operations. Data is stored with CRC information in each block. This mode affects performance because additional processor usage is required for Tivoli Storage Manager and the tape drive to calculate and compare CRC values. The READWRITE value does not affect backup sets and data that is generated by the BACKUP DB command. When the LBPROTECT parameter is set to READWRITE, you do not have to specify the CRCDATA parameter in a storage pool definition because logical block protection provides better protection against data corruption. WRITEOnly - Specifies that logical block protection is enabled in the server and the tape drive for write operations only. Data is stored containing CRC information in each block. For read operations, the server and the tape drive do not validate the CRC. This mode affects performance because additional processor usage is required for Tivoli Storage Manager to generate the CRC and for the tape drive to calculate and compare CRC values for write operations. The WRITEONLY value does not affect backup sets and data that is generated by the BACKUP DB command. No - Specifies that logical block protection is not enabled in the server and the tape drive for read and write operations. However, the server enables logical block protection on write operations for a filling volume that already has data with logical block protection. Logical block protection is supported only on the following types of drives and media: o IBM LTO5 and later o IBM 3592 Generation 3 drives and later with 3592 Generation 2 media and later AFFECTED PLATFORMS: AIX, HP-UX, Solaris, Linux, and Windows.
Problem conclusion
The described problem has been resolved. When the feature is available, see Technote 1568108 for more information including the device driver and firmware requirements for logical block protection support. http://www.ibm.com/support/docview.wss?uid=swg21568108
Temporary fix
Comments
APAR Information
APAR number
IC78808
Reported component name
TSM SERVER
Reported component ID
5698ISMSV
Reported release
62A
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-09-20
Closed date
2011-11-22
Last modified date
2011-11-22
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
TSM SERVER
Fixed component ID
5698ISMSV
Applicable component levels
R53Z PSY
UP
R62A PSY
UP
R62H PSY
UP
R62L PSY
UP
R62S PSY
UP
R62W PSY
UP
R63A PSY
UP
R63H PSY
UP
R63L PSY
UP
R63S PSY
UP
R63W PSY
UP
R63Z PSY
UP
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Document Information
Modified date:
22 November 2011