Date: Tue, 22 Aug 2000 01:13:28 -0500 From: John Lengeling <johnl@raccoon.com> To: sthaug@nethelp.no Cc: freebsd-scsi@freebsd.org Subject: Re: Different init speeds of raid5 plex subdisks under vinum Message-ID: <39A21A08.E6688013@raccoon.com> References: <39A21314.1107B6AD@raccoon.com> <37075.966923411@verdi.nethelp.no>
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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
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