Here's a flash about potential data loss on a TS7700 with back-end disk cache controller 3956-CS9/CC9 and disk cache expansion 3956-XS9/CX9.Here's part of its content :
Background:
Certain model disk drives within 3956-CS9/CC9
model controllers and 3956-XS9/CX9 model enclosures are exposed to a
rare issue that can result in data loss. The problem is related to an
internal integrity checking mechanism contained within certain model
disk drives. There is a rare condition in which an underlying disk drive
scanning routine can corrupt a disk sector some time after content has
been previously written. (...)
Drive Model and Firmware Details:
For 3956-CS9/XS9 configurations, 3TB drives with model ST3000NM0043 are
exposed to this issue when down level firmware is present. Firmware
level EC5C or greater contains a fix for this issue.
For
3956-CC9/CX9 configurations, 600GB drives with model ST600MM026 are
exposed to this issue when down level firmware is present. Firmware
level E56F or greater contains a fix for this issue.
Solution (Procedure):
Vtd_exec.154 v1.41 or above should be installed on all affected systems.
Note: An updated version of vtd_exec.154 is expected to be released mid
December. It is recommended to utilize the updated version if possible.
Alternatively upgrade the TS7700 to latest released code level R3.3 (8.33.0.45).
Either of these solutions must be applied by an IBM Service Representative.
Do check out the full information in the flash itself.
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