Date: Sat, 15 Aug 1998 00:17:13 +0300 (EEST) From: Matti Aarnio <matti.aarnio@sonera.fi> To: dledford@dialnet.net (Doug Ledford) Cc: matti.aarnio@sonera.fi, linux-scsi@vger.rutgers.edu, aic7xxx@FreeBSD.ORG Subject: Re: AHA2790UW has speed-limit problems ? Message-ID: <19980814211728Z92206-1425%2B88@mea.tmt.tele.fi> In-Reply-To: <35D48BFF.6FAA1851@dialnet.net> from Doug Ledford at "Aug 14, 98 02:11:59 pm"
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Doug Ledford <dledford@dialnet.net> replies: > Matti Aarnio wrote: > > Hello, > > Some days ago I sent a plea for fix to <linux-scsi@vger.rutgers.edu> > > list. As it turns out, my problem seem to relate on the chassis internal > > ultra-wide cable, and to the devices attached to it. .... > > Four Ultra-Wide (SingleEnded) disks on high quality cable inside .... > > Now my RAID0 write throughput has dropped from 12.odd MB/sec to 7.odd > > MB/sec speed. > > I take it these drives aren't speed demons on their own? FWIW, I see 25.odd > MB/sec sustained writes on a 4 drive RAID0 array here. Oh they are reasonable, the RAID0 PAIR runs at 12+ MB/sec, but the system has also two stand-alone disks. ( root: 2G, /home: 4G, /usr/src: 9+9 GB RAID0 pair ) > -- > Doug Ledford <dledford@dialnet.net> /Matti Aarnio <matti.aarnio@sonera.fi> To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe aic7xxx" in the body of the message
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