* WG: questions regarding Journalling-FSes and w-cache reordering
@ 2003-04-10 0:58 Oliver S.
0 siblings, 0 replies; 2+ messages in thread
From: Oliver S. @ 2003-04-10 0:58 UTC (permalink / raw)
To: linux-kernel
> I'd like to build a reliable ~1 TB RAID 5 from IDE drives. I will
> gladly give up performance for high reliability and low cost.
Most ATA-RAIDs disable write-caching, and that's not really a performance
-disadvantage with a decent drive-scheduler (afaik most OSes implement a
cyclical-scan and not elevator-schedulers) when the HD has a linear mapping;
and today's ATA-HDs all have linear mappings. Only with back-to-back writes
can cause the HD to have a lap of honour.
^ permalink raw reply [flat|nested] 2+ messages in thread
* WG: questions regarding Journalling-FSes and w-cache reordering
@ 2003-04-10 1:35 Oliver S.
0 siblings, 0 replies; 2+ messages in thread
From: Oliver S. @ 2003-04-10 1:35 UTC (permalink / raw)
To: linux-kernel
> hehe
> I would argue that we can schedule I/O much better than any
> OS can,
But if the OS can rely on a linear mapping the scheduling isn't
significantly worse than when handled by the HD.
^ permalink raw reply [flat|nested] 2+ messages in thread
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