Date: Fri, 6 May 2005 15:57:30 +0200 From: Herve Boulouis <amon@sockar.homeip.net> To: Anton Turygin <pa3op@tsua.net> Cc: freebsd-scsi@freebsd.org Subject: Re: Adaptec 2120S FreeBSD 4.11 poor performance Message-ID: <20050506135730.GC71715@ra.aabs> In-Reply-To: <20050506162412.G91866@colt.tsua.net> References: <20050506130002.L13748@colt.tsua.net> <20050506121942.GB71715@ra.aabs> <20050506162412.G91866@colt.tsua.net>
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Le 06/05/2005 16:26, Anton Turygin a écrit: > > Read Cache Setting : ENABLE > Write Cache Setting : ENABLE ALWAYS > Write Cache Status : Active, not protected, battery not present > > The array speed is up to 35 MB/s (it is still not enough). this is typically the throughput you get with U160 drives. This should go up to 70 MB/s with U320 drives (YMMV, but this is what I usually get here with RAID 5 arrays of 3-5 disks). Also keep in mind that the 2120S is not a performance monster (the 2200S seems better on this point) > The only thing - I didn't have succes in turning the Read Cache off. You have to do all the changes in 1 command : container set cache /read_cache_enable=false /unprotected=true 0 -- Herve Boulouis
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