From owner-freebsd-scsi Mon Aug 21 23:13:32 2000 Delivered-To: freebsd-scsi@freebsd.org Received: from ns1.networkiowa.com (ns1.networkiowa.com [209.234.64.192]) by hub.freebsd.org (Postfix) with ESMTP id D5CAE37B43F for ; Mon, 21 Aug 2000 23:13:29 -0700 (PDT) Received: from raccoon.com (dsl.72.145.networkiowa.com [209.234.72.145]) by ns1.networkiowa.com (8.9.3/8.9.3) with ESMTP id BAA03390; Tue, 22 Aug 2000 01:18:40 -0500 Message-ID: <39A21A08.E6688013@raccoon.com> Date: Tue, 22 Aug 2000 01:13:28 -0500 From: John Lengeling X-Mailer: Mozilla 4.7 [en] (Win98; I) X-Accept-Language: en MIME-Version: 1.0 To: sthaug@nethelp.no Cc: freebsd-scsi@freebsd.org Subject: Re: Different init speeds of raid5 plex subdisks under vinum References: <39A21314.1107B6AD@raccoon.com> <37075.966923411@verdi.nethelp.no> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org sthaug@nethelp.no wrote: > > > When I ran the vinum init command to initialize the plex, one of the > > drives da2 completed the initialization 3-4 times faster than da1 > > and da3. Something like 20 minutes for da2 versus 60 minutes for > > da1/da3. Both da1 and da3 initialized at the same rate. Is this > > weird? Did da3/da1 get transfers negotiated down to slower speeds? > > Bad cabling? > > I noticed a similar problem when initializing a 4-disk RAID5 array some > weeks ago. In my case I had two disks on ATA-66 controllers and two disks > on ATA-33 - and the ATA-66 connected disks initialized at roughly double > the rate of the ATA-33 connected disks. I simply assumed it was due to > difference between the ATA-66 and ATA-33 speeds. > > Steinar Haug, Nethelp consulting, sthaug@nethelp.no All 3 drives are on the same SCSI bus in my case. Thanks To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message