Messages in this thread | | | Subject | RE: questions regarding Journalling-FSes and w-cache reordering | From | Torrey Hoffman <> | Date | 09 Apr 2003 14:35:55 -0700 |
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On Wed, 2003-04-09 at 13:12, Alan Cox wrote: > On Mer, 2003-04-09 at 20:52, Mudama, Eric wrote: > > ATA hard drives are allowed to reorder/merge/etc their write caches if write > > cache is enabled. With write caching enabled, there is no guarantee that > > dirty data will be flushed in any specific order, nor does the ATA protocol > > support any such ordering beyond the global flush cache command. > > To cheer people up further by the way, not all ATA drives support cache > flush, some drives dont support write cache disable and others implement > write/verify as write.
Can anyone recommend some decent 120 GB or larger IDE drives which don't play these games?
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.
My current 240 GB RAID 5 is built from five 60 GB Maxtor IDEs, with a Reiser FS on it. I use hdparm to disable write cache... unless Maxtor ignores that? Does anyone know? I can check the exact model numbers of the drives if it matters.
Is there documentation anywhere that says which drives cut corners? Any other suggestions on how to build a cheap but reliable RAID?
Thanks in advance,
-- Torrey Hoffman <thoffman@arnor.net>
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