Notification
Risk classification
HIPER (High Impact and/or Pervasive)
Risk categories
Data Loss
Affected Domain
DS8900F:
All using Safeguarded Copy, with Extent Space Efficient (ESE) Safeguarded source volumes
DS8880:
All using Safeguarded Copy, with Extent Space Efficient (ESE) Safeguarded source volumes
Abstract
While Safeguarded Copy backup is in progress, an LPAR error handling event may cause undetected loss of data on a Safeguarded ESE source volume.
Description
When performing a Safeguarded Copy backup, a very small (tens of milliseconds) window of time exists wherein an error handling event (warmstart or sudden LPAR failover) may cause a validation process to take an incorrect path, leading to a loss of the Safeguarded ESE Source volume data.
If the Safeguarded ESE Source Volume is CKD, the data loss will be detected as an invalid track format.
If the Safeguarded ESE Source Volume is Fixed Block, the data loss may go undetected.
Recommended Action
Install the following bundles containing the fix:
DS8900F:
R9.4 GA3 - 89.40.93.0
R9.3 SP3.5 - 89.33.51.0
DS8880:
R8.5 SP13.1 - 88.59.51.0
Reference ID
363337
Date first published
05 April 2024
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Document Information
Modified date:
05 April 2024
UID
ibm17129800