On Tue, Aug 12, 2008 at 6:23 PM, Scott Carey <scott@xxxxxxxxxxxxxxxxx> wrote: > Some SATA drives were known to not flush their cache when told to. > Some file systems don't know about this (UFS, older linux kernels, etc). > > So yes, if your OS / File System / Controller card combo properly sends the > write cache flush command, and the drive is not a flawed one, all is well. > Most should, not all do. Any one of those bits along the chain can > potentially be disk write cache unsafe. I can attest to the 2.4 kernel not being able to guarantee fsync on IDE drives. And to the LSI megaraid SCSI controllers of the era surviving numerous power off tests.
