WG: questions regarding Journalling-FSes and w-cache reordering

From: Oliver S. (Follow.Me@gmx.net)
Date: Wed Apr 09 2003 - 19:58:15 EST


> 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.

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