Problems unmounting/fssyncking extern UFS filesystem
olli at lurza.secnetix.de
Wed Nov 29 08:07:17 PST 2006
Christopher Sean Hilton wrote:
> Kevin Oberman wrote:
> [ ... ]
> > The magic phrase is "buffer cache has been flushed". In the real world
> > of discs with cache there is no way to be certain when the data is
> > REALLY on the disc. That is why things get clobbered if the power is
> > cycled to the disc too soon after syncing and why a sleep (or typing
> > sync three times) is still a good idea and probably always will be.
> Please understand that this is an honest question but isn't that true
> only of IDE heritage drives. E.g. If a SCSI drive with Tagged Queuing
> says that the the bits have been written doesn't it mean that the bits
> have really been written?
Right, unless the SCSI drive has a label saying "Quantum".
PS: Quantum is today owned by maxtor, isn't it? I've lost
track of HD manufacturers when Seagate bought Conner ...
Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing
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