Date: Wed, 6 Sep 2000 08:55:27 +0930 From: Greg Lehey <grog@lemis.com> To: Vallo Kallaste <vallo@matti.ee> Cc: Mike Tancsa <mike@sentex.net>, stable@FreeBSD.ORG Subject: Re: Vinum (was: RAID) Message-ID: <20000906085527.D21113@wantadilla.lemis.com> In-Reply-To: <20000905115126.A14470@myhakas.matti.ee>; from vallo@matti.ee on Tue, Sep 05, 2000 at 11:51:26AM %2B0200 References: <4.2.2.20000904120154.07455bd0@mail.sentex.net> <4.2.2.20000903213318.074039f0@mail.sentex.net> <4.2.2.20000903213318.074039f0@mail.sentex.net> <00090310375700.05988@www.runapplications.com> <4.2.2.20000904120154.07455bd0@mail.sentex.net> <20000905101653.A49732@wantadilla.lemis.com> <4.2.2.20000904204407.033e2920@mail.sentex.net> <20000905115126.A14470@myhakas.matti.ee>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tuesday, 5 September 2000 at 11:51:26 +0200, Vallo Kallaste wrote: > On Mon, Sep 04, 2000 at 08:47:02PM -0400, Mike Tancsa <mike@sentex.net> wrote: > >> Thanks! I have a test system I will play with for a while before >> deploying. BTW, is vinum in theory and practice as stable on ata drives as >> on SCSI ? > > I spent a week lately trying out vinum with five ATA disks. The mobo had > ATA-100 capability, so two drives did run at ATA-100, the other ones at > ATA-66 (two Promise controllers). I pushed the RAID-5 quite hard with > continous parallel buildworld, two-days running postmark and bonnie++, > all at the same time. Had no problems, it seems really solid now. The > disks were IBM DTLA type, 15G. FWIW, the German magazine recently published a comparison of 331 disk drives (issue 16/00). The top performing IDE drive was the IBM DTLA 307030 (30 GB), with a weighted result of 20.7 MB/s. Only one SCSI drive exceeded this value. I don't see a 15 GB DTLA drive in the list, the smallest is 19 GB, but it only did 13.9 MB/s. Note that the benchmark is probably flawed: the tests found an average positioning time of 11.0 ms for the DTLA 307030, compared to as low as 7.2 ms for SCSI drives (IBM DDYS). If these times seem slow to you, c't measures positioning time differently from the manufacturers: they measure the average over the whole disk, while manufacturers measure the average over the first 504 MB (!). Greg -- Finger grog@lemis.com for PGP public key See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20000906085527.D21113>