APAR status
Closed as program error.
Error description
TSM is not updating the File Volume to FULL once the first End-of-volume is received. This only happens when TSM reaches the end of an aggregate file at the same time TSM receives the End-of-volume and Out-of-space in file system messages. TSM tries to use the volume again as it did not update the volume to FULL. The repeated attempts to use the FULL volume, causes TSM to not track the data correctly within the volume. Activity log messages: These repeat for the same volume several times: 02/23/2008 21:33:07 ANR8341I End-of-volume reached for FILE volume /tsmdata04/0000EAB6.BFS. (SESSION: 24184) 02/23/2008 21:33:07 ANR8785E Out-of-space in file system for FILE volume /tsmdata04/0000EAB6.BFS. (SESSION: 24184) Volume may get updated to read-only: 02/26/2008 05:41:29 ANR1417W Access mode for volume /tsmdata04/0000EAB6.BFS now set to "read-only" due to excessive read error. (SESSION: 1699, PROCESS: 2) An Audit Volume Fix=no will report: 02/26/2008 09:46:13 ANR2335W Audit Volume has encountered an I/O error for volume /tsmdata04/0000EAB6.BFS while attempting to read: Node xxx, Type Backup (Active), Filespace yyy 1, fsId 1, File Name zzz. (SESSION: 2703, PROCESS: 8) Initial Impact: Low Additional Keywords: damaged data ANR1228I end of volume out space
Local fix
1) Increase migration thresholds in the FILE pool to prevent TSM from hitting end-of-space. 2) Update the File device class MAXCAPacity to a different size. The value specified should be less than the maximum supported size of a file on the target file system.
Problem summary
**************************************************************** * USERS AFFECTED: All TSM servers using devclasses with * * devtype=FILE. * **************************************************************** * PROBLEM DESCRIPTION: See ERROR DESCRIPTION. * **************************************************************** * RECOMMENDATION: Apply fixing level when available. This * * problem is currently projected to be fixed * * in levels 5.3.6.3, 5.4.3, 5.5.0.2 and 5.5.1. * * * * Note that this is subject to change at the * * discretion of IBM. * **************************************************************** See ERROR DESCRIPTION.
Problem conclusion
The described problem only occurs when the end of the file aggregate being backed up occurs at the same time that TSM hits the end of the filespace, such that there is enough space to finish writing out the data but not enough space to write out a full 256k block. The write is allowed to proceed in this case, but the volume is not yet marked full by TSM. If TSM attempts to appended to this FILE volume without the available space in the filespace increasing (e.g. other files in the filespace being deleted would increase the available space), no issue will occur and the volume will be marked full by TSM. The problem occurs precisely when the filespace has enough size for another backup on the append and the volume's positioning information becomes corrupted for the files at the end of the volume. The described problem has been resolved, and it can be detected by the multiple end-of-volume messages for a FILE volume as described in the error description. These volumes should be audited (AUDIT VOLUME with FIX=YES) to resolve which files are damaged. The damaged files at the end of the volume from this situation should be fixed from a copypool or backed up again through the TSM client.
Temporary fix
Comments
APAR Information
APAR number
IC55619
Reported component name
TSM SERVER
Reported component ID
5698ISMSV
Reported release
55A
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2008-03-11
Closed date
2008-03-31
Last modified date
2008-03-31
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
R53A PSY
UP
R53H PSY
UP
R53L PSY
UP
R53S PSY
UP
R53W PSY
UP
R53Z PSY
UP
R54A PSY
UP
R54H PSY
UP
R54L PSY
UP
R54S PSY
UP
R54W PSY
UP
R54Z PSY
UP
R55A PSY
UP
R55H PSY
UP
R55L PSY
UP
R55S PSY
UP
R55W PSY
UP
R55Z PSY
UP
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Document Information
Modified date:
31 March 2008