On Tue, Feb 06, 2001 at 05:54:41PM +0000, David Woodhouse wrote:
>
> sct@redhat.com said:
> > Linux will obey that if it possibly can: only in cases where the
> > hardware is actively lying about when the data has hit disk will the
> > guarantee break down.
>
> Do we attempt to ask SCSI disks nicely to flush their write caches in this
> situation? cf. http://www.danbbs.dk/~dino/SCSI/SCSI2-09.html#9.2.18
No, we simply omit to instruct them to enable write-back caching.
Linux assumes that the WCE (write cache enable) bit in a disk's
caching mode page is zero.
--Stephen
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