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Re: Write cache

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Andreas Pflug <pgadmin(at)pse-consulting(dot)de>
Cc: ohp(at)pyrenet(dot)fr, Larry Rosenman <ler(at)lerctr(dot)org>,pgsql-hackers list <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Write cache
Date: 2004-01-28 00:09:57
Message-ID: 1355.1075248597@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers
Andreas Pflug <pgadmin(at)pse-consulting(dot)de> writes:
> This would be the first time a SCSI disk lies about its write caching. 
> There are plenty of low-cost (i.e. IDE) disks out there having a hidden 
> write cache, but AFAIK a generic SCSI tool is usable to enable/disable 
> the write cache.

A SCSI disk shouldn't lie about write completion in any case; there's no
need to because the interface spec is inherently multi-threaded (unlike
IDE).  See past discussions.

			regards, tom lane

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