Re: Write cache - Mailing list pgsql-hackers

From Tom Lane
Subject Re: Write cache
Date
Msg-id 1355.1075248597@sss.pgh.pa.us
Whole thread Raw
In response to Re: Write cache  (Andreas Pflug <pgadmin@pse-consulting.de>)
Responses Re: Write cache  (Andrew Dunstan <andrew@dunslane.net>)
List pgsql-hackers
Andreas Pflug <pgadmin@pse-consulting.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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