> 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
