[linux-lvm] Re: [PATCH] 64 bit scsi read/write

[Jonathan Lundell <jlundell pobox com>]

At 4:02 PM +1200 2001-07-15, Chris Wedgwood wrote:
> On Sat, Jul 14, 2001 at 10:33:44AM -0700, Jonathan Lundell wrote:
>
>     What's worse, though the spec is not explicit on this point, it
>     appears that the write cache is lost on a SCSI reset, which is
>     typically used by drivers for last-resort error recovery. And of
>     course a SCSI bus reset affects all the drives on the bus, not
>     just the offending one.
>
> Doesn't SCSI have a notion of write barriers?
>
> Even if this is required, the above still works because for anything
> requiring a barrier, you wait for a positive SYNCHRONIZE CACHE

Sure, if you keep all your write buffers around until then, so you 
can re-write if the sync fails. And if you don't crash in the 
meantime.
--
/Jonathan Lundell.