Messages in this thread | | | Date | Wed, 07 Mar 2001 13:47:41 +0100 | From | David Balazic <> |
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Andre Hedrick (andre@linux-ide.org) wrote on Wed Mar 07 2001 - 01:58:44 EST :
> On Wed, 7 Mar 2001, Jonathan Morton wrote:
[ snip ]
> > >Since all OSes that enable WC at init will flush > > >it at shutdown and do a periodic purge with in-activity. > > > > But Linux doesn't, as has been pointed out earlier. We need to fix Linux. > > Friend I have fixed this some time ago but it is bundled with TASKFILE > that is not going to arrive until 2.5. Because I need a way to execute > this and hold the driver until it is complete, regardless of the shutdown > method.
I don't understand 100%. Is TASKFILE required to do proper write cache flushing ?
> > >Err, last time I check all good devices flush their write caching on their > > >own to take advantage of having a maximum cache for prefetching. > > > > Which doesn't work if the buffer is filled up by the OS 0.5 seconds before > > the power goes. > > Maybe that is why there is a vender disk-cache dump zone on the edge of > the platters...just maybe you need to buy your drives from somebody that > does this and has a predictive sector stretcher as the energy from the > inertia by the DC three-phase motor executes the dump.
So where is a list of drives that do this ? www.list-of-hardware-that-doesnt-suck.com is not responding ...
> Ever wondered why modern drives have open collectors on the databuss?
no :-)
-- David Balazic -------------- "Be excellent to each other." - Bill & Ted - - - - - - - - - - - - - - - - - - - - - - - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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