IBM Support

HIPER - Potential Undetected Data Corruption Scenario Due to a Flash Module Correctable Error

Flashes (Alerts)


Abstract

IBM has identified a low probability, failure scenario where Flash Systems 840, V840, 900 and V9000 can corrupt data.

Content

Description
IBM has identified a scenario where a flash module correctable error can cause undetected data corruption. When the error occurs it is detected, and the flash module resets itself. In rare cases, before the reset is complete, a 4K block of zeros can be sent from the flash module.
  
 
Systems Affected
9840-AE1 FlashSystem 840  9846-AE1 FlashSystem V840
9843-AE1 FlashSystem 840  9848-AE1 FlashSystem V840
9840-AE2 FlashSystem 900  9846-AE2 FlashSystem V9000
9843-AE2 FlashSystem 900  9848-AE2 FlashSystem V9000


Mitigation
Upgrade to the 1.4.7.0 PTF – The PTF mitigates the likelihood of this corruption. In previous versions of firmware a zero page can be sent erroneously if a specific bit a set. The PTF disables the ability for the flash card to generate a zero page if the bit is set in error.
 
For V9000, a new firmware will contain the fixes to be implemented in releases 7.8.1.3 which are targeted for 3Q17.

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Document Information

Modified date:
17 February 2023

UID

ssg1S1010529

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