> Anyone run their RAIDs with disk caches enabled, or is this akin to
> having fsync off?
Disk write caches are basically always akin to having fsync off. The
only time a write-cache is (more or less) safe to enable is when it is
backed by a battery or in some other way made non-volatile.
So a RAID controller with a battery-backed write cache can enable its
own write cache, but can't safely enable the write-caches on the disk
drives it manages.
-- Mark Lewis
