Date: Thu, 10 Aug 2000 14:21:40 -0700 From: Mike Smith <msmith@freebsd.org> To: Mike Tancsa <mike@sentex.net> Cc: hardware@FreeBSD.ORG Subject: Re: 3ware and RAID0 vs RAID 1 Message-ID: <200008102121.OAA01408@mass.osd.bsdi.com> In-Reply-To: Your message of "Thu, 10 Aug 2000 16:17:19 EDT." <4.3.2.7.0.20000810160701.0310bf00@marble.sentex.ca>
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Newfs isn't a representative case with these cards, as newfs doesn't align the data it writes and the driver has to copy the data around (expensive). The array itself should still perform pretty well (read speeds should be pretty good especially). > Hi, > I have been using the 3ware cards in RAID0 with great results. However, I > just got a 5200 to use in a RAID 1 application. I was expecting a little > less performance, but I was quite suprised to find that writing speeds were > brutal. For example, to newfs a 2 drive array (2 quantum 13gig drives), it > took 35 min. In RAID0, it flys as expected, and the array is quite > speedy. Is writing speed really this bad (half of the speed of the same > IDE drive by iteself) ? Or is it pilot error ? Bad hardware ? > > ---Mike > ------------------------------------------------------------------------ > Mike Tancsa, tel +1 519 651 3400 > Sentex Communications mike@sentex.net > Cambridge, Ontario Canada www.sentex.net > > -- ... every activity meets with opposition, everyone who acts has his rivals and unfortunately opponents also. But not because people want to be opponents, rather because the tasks and relationships force people to take different points of view. [Dr. Fritz Todt] To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
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