Fixes are available
Refresh Pack 5.2.6 (June 2015) for Tivoli Storage Productivity Center
Refresh Pack 5.2.7 (August 2015) for Tivoli Storage Productivity Center
IBM Spectrum Control V5.2.8 (December 2015)
IBM Spectrum Control V5.2.9 (February 2016)
IBM Spectrum Control V5.2.10 (May 2016)
IBM Spectrum Control V5.2.10.1 (July 2016)
IBM Spectrum Control V5.2.11 (August 2016)
IBM Spectrum Control V5.2.12 (November 2016)
IBM Spectrum Control V5.2.13 (March 2017)
IBM Spectrum Control V5.2.14 (May 2017)
IBM Spectrum Control V5.2.15 (August 2017)
IBM Spectrum Control V5.2.15.2 (November 2017)
IBM Spectrum Control V5.2.16 (March 2018)
IBM Spectrum Control V5.2.17 (May 2018)
Fix Pack 5.2.7.1 (February 2016) for Tivoli Storage Productivity Center
APAR status
Closed as program error.
Error description
Certain error conditions on the hardware can cause the transitioning states of an MGM session to fail at the incremental resynch process during transition of an MGM session from Global Mirror mode (2 site, H1->H3 or H2->H3 ) to Metro Global Mirror mode (3 site, H1->H2->H3 or H2->H1->H3). During the processing, TPC-R needs to terminate the MM pair to allow resynch of the GM pairs. If there is a hardware error that prevents this processing from continuing, the session will get stuck in a Preparing / Severe state. Errors will be marked on the pairs that have a failure or sense data from the hardware, and the session will allow a Restart option (Start H1-> H2 ->H3, Start H2->H1 ->H3). If the user chooses to issue the restart, TPC-R will re-issue the terminate to the MetroMirror pair at the target. This has the unintended consequences of removing the relationships and bitmaps at the "middle" site, and will cause the session to become stuck in a Preparing / Severe state, with no options except for Terminate and Refresh states. At this point all relationships are lost at H2 and therefore manual re-establishment via dscli will be necessary. RECREATE STEPS: Issue a second "Start H1H2H3" command against a session which failed while transitioning from GM to MGM mode. observe that the MetroMirror target terminates. ________________________________________________________________ DB2 Version used for Server: N/A The defect is against component: 5608TPC00 Server/Manager build/release (TPC): 5.2.0 ________________________________________________________________ Problem as described by customer: production replaction suspended Initial customer impact (low/med/high): high
Local fix
If an error occurs during the transition of GM to MGM mode occurs: Do NOT attempt to reissue the H1->H2->H3 or H2->H1->H3 commands. Instead, immediately take statesaves and TPC-R log package and contact support to determine the cause of the error and the state of the pairs. To continue TPC-R transition into the 3 site mode, determine the pairs that are marked with a condition or sense data code and either correct this condition or export all copy sets to a .csv file, and then remove the error copysets from the session (with the option to remove the relationship from the hardware). Doing this will allow the session to Transition into 3-site mode and go into a prepared state. Correct the problem on the error pairs and then add them back into the TPC-R MGM configuration. This may require IBM support or CE intervention. After the error pairs have been recovered ,TPC-R should be able now to assimilate the base Metro Mirror and Flash Copy relationships (but not GM lsssession, so ensure that the pairs are not members of a GM session prior to adding).
Problem summary
| fix pack | 5.2.6-TIV-TPC-FP0000 - target 2Q 2015 | http://www-01.ibm.com/support/docview.wss?&uid=swg21320822 The target dates for future fix packs do not represent a formal commitment by IBM. The dates are subject to change without notice. The problem occurs with MGM sessions that are transferred back into an H1-H2-H3 config from GC mode (H1-H3) OR into H2-H1-H3 config from GC mode H2-H3. As part of the processing for recovery a terminate is issued to the secondaries. This is required to establish the new relationship for the transitional post processing. IFF an error occurs during the processing, TPC-R allows the command to be re-issued. Once the command is reissued a second terminate command is issued to the secondary which destroys the bitmap and causes the secondary to become simplex and has no knowledge of the relationship. This requires the relationship to now be re-established and a full copy is needed
Problem conclusion
A second restart will no longer issue a second terminate as long as the first terminate has completed successfully.
Temporary fix
Comments
APAR Information
APAR number
IT06843
Reported component name
TPC
Reported component ID
5608TPC00
Reported release
520
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2015-01-29
Closed date
2015-04-06
Last modified date
2015-04-06
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
TPC
Fixed component ID
5608TPC00
Applicable component levels
R525 PSN
UP
Document Information
Modified date:
22 February 2022