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LSI, Intel and Dell RAID controllers (perhaps others) have a "Patrol Read" feature to try to spot when a drive is failing before it completely fails.

LSI seems to disable patrol read on SSD by default but allows you to turn it on if desired via MegaCLi's SupportSSDPatrolRead option.

Is there any reason why I should NOT turn on patrol read for SSD? Will it cause premature failures? Or is it pointless for SSD?

I am suspicious because of the default disable. But I cannot find documentation anywhere that states why or why not.

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I'd leave it off. It may not be necessary, as quality/enterprise SSDs perform their own wear-leveling and reallocation of bad sectors. The RAID controller's "Patrol Read" is really geared towards the failure modes of mechanical drives.

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