On 25/06/15 13:19, Roman Mamedov wrote:
Couldn't this be simply the normal observed effect of using TRIM on SSD? After deleting some files, the filesystem issues a discard request, it does nothing to the HDDs, but the content of the discared areas on SSD is no longer deterministic (or mostly zeroed, as mentioned in the original report). So there is now a mismatch between the content of HDDs and SSD, but since it is in the area of deleted files, it doesn't affect the system in any way.
I get this on a RAID10 with Intel & Samsung SSD's. One supports deterministic after TRIM and the other doesn't. Mismatch count is always through the roof as a result but there are no other negative effects.
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