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List:       freebsd-scsi
Subject:    Re: Different init speeds of raid5 plex subdisks under vinum
From:       John Lengeling <johnl () raccoon ! com>
Date:       2000-08-22 6:13:28
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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


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