Messages in this thread | | | From | NeilBrown <> | Date | Tue, 27 May 2008 16:31:53 +1000 | Subject | [PATCH 000 of 3] md: raid5 patches suitable for 2.6.26 and -stable |
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Following are three patches that fixes bugs in raid5 that could conceivable cause data corruption (1 and 3) or and oops (2).
Bugs 1 and 3 can cause a 'resync' to mistakenly think the partiy block is correct when infact it isn't (it looks at a parity block that was generated rather than read from disk). If this happens to leave a parity block wrong, and a device then fails, data regenerated based on that parity block will be wrong.
Once a patched kernel is installed, running a repair pass (echo repair > .../sync_action) will fix any incorrect parity.
The Oops (patch 2) can only happen if you right to a partucular sysfs file that only root has access to and only developer (currently) have any reason to write to.
NeilBrown
[PATCH 001 of 3] md: md: fix prexor vs sync_request race [PATCH 002 of 3] md: fix uninitialized use of mddev->recovery_wait [PATCH 003 of 3] md: Do not compute parity unless it is on a failed drive
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