DB2 - Problem description
Problem IT38822 | Status: Closed |
IBM SPECTRUM PROTECT SNAPSHOT CREATED COPY MAY BECOME INVALID DUE TO SAN VOLUME CONTROLLER HU02427 ISSUE | |
product: | |
FLSHCPY DB2 AGE / 5608AC6DB / 81A - DB2 | |
Problem description: | |
When running backup operations using IBM Spectrum Protect Snapshot on SVC, Storwize of FlashSystem devices, copies may become invalid due to an error reported by the device: FlashCopy stopped due to error 1910 Customer/Support Diagnostics: IBM Spectrum Protect Snapshot backup operation will end correctly and will not report any errors. This is due to the storage device reporting successful the copy creation status, when in fact it is not. 1910 errors will appear in the storage device event log and will invalidate the copy. Due to an issue in storage hardware firmware HU02427, and its circumvention approach, a change is introduced in IBM Spectrum Protect Snapshot to allow delays in issuing storage system commands. Use of delays should be limited to situation when storage system firmware is exposed to HU02427. Spectrum Protect Versions Affected: IBM Spectrum Snapshot versions 8.1.x on all supported platforms IBM Tivoli FlashCopy Manager versions 4.1.x on all supported platforms Initial Impact: Medium Additional Keywords: TS006851476 fcm FlashCopy HU02427 1910 | |
Problem Summary: | |
**************************************************************** * USERS AFFECTED: * * Users of IBM Spectrum Protect Snapshot for UNIX who create * * snapshots of volumes created on IBM SAN Volume Controller * * storage system and affected by the APAR HU02427 for SVC * * storage system firmware. * **************************************************************** * PROBLEM DESCRIPTION: * * See error description * **************************************************************** * RECOMMENDATION: * * If you see the error 1910 in the SVC storage device event * * log then contact the SVC storage support. If the support * * recommended using a workaround implemented in the scope of * * this APAR then refer to the "Local Fix" section to get more * * details. * * This workaround is currently projected to be implemented in * * the 8.1.11.2 interim fix. Apply this interim fix when * * available. Note that this information is subject to change * * at the discretion of IBM. * **************************************************************** | |
Local Fix: | |
Install the version containing the APAR fix and edit the file /storageadapters/svc/customparameters.cfg. Set delays: Type="UNDOCUMENTED" ... Name = "DELAY_BEFORE_PREPARE_FCMAP" Default = "30" Name = "DELAY_BEFORE_PREPARE_DUPLICATE_SNAPSHOT" Default = "0" The DELAY_BEFORE_PREPARE_FCMAP sets a delay in seconds between the creation of all target volumes and preparing of consistency group that contains FlashCopy maps for these volumes. The DELAY_BEFORE_PREPARE_DUPLICATE_SNAPSHOT does the same but for the mount case. Pay attention that in the mount case Spectrum Protect Snapshot creates a target volume and FlashCopy map for every pair of volumes sequentially, which can lead to long delays and should only be set in cases when seeing error 1910 in storage device event logs during an IBM Spectrum Protect Snapshot 'mount' operation. | |
Solution | |
Workaround | |
**************************************************************** * USERS AFFECTED: * * Users of IBM Spectrum Protect Snapshot for UNIX who create * * snapshots of volumes created on IBM SAN Volume Controller * * storage system and affected by the APAR HU02427 for SVC * * storage system firmware. * **************************************************************** * PROBLEM DESCRIPTION: * * See error description * **************************************************************** * RECOMMENDATION: * * If you see the error 1910 in the SVC storage device event * * log then contact the SVC storage support. If the support * * recommended using a workaround implemented in the scope of * * this APAR then refer to the "Local Fix" section to get more * * details. * * This workaround is currently projected to be implemented in * * the 8.1.11.2 interim fix. Apply this interim fix when * * available. Note that this information is subject to change * * at the discretion of IBM. * **************************************************************** | |
Comment | |
The SVCDTA adapter of IBM Spectrum Protect Snapshot for UNIX has been extended by two additional parameters which will allow implementing a circumvention for IBM SVC storage firmware problem ( see APAR HU02427 for more details). The parameters are described in the "Local Fix" section of this APAR. | |
Timestamps | |
Date - problem reported : Date - problem closed : Date - last modified : | 11.11.2021 19.01.2022 19.01.2022 |
Problem solved at the following versions (IBM BugInfos) | |
Problem solved according to the fixlist(s) of the following version(s) |