On Wed, 2020-12-02 at 10:55 -0500, Phillip Susi wrote: > Christoph Hellwig writes: > > > If the device drops the content of the volatile write on a reset > > we'll have much problems than that.. > > How could it not? The write cache is empty after a power on reset > and certainly a "hard" reset should be the same as a power on reset. As Christoph said it would be stupid behaviour to invalidate the cache after a hard reset because it would cause all deferred writes to fail. The SCSI standards committee did initially assume manufacturers knew this, but it was codified in SBC-4 and beyond with an explicit list of conditions under which the write back cache could be lost, which doesn't include hard reset. James
