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From: terry@spcvxb.spc.edu (Terry Kennedy, Operations Mgr.)
Subject: Re: SCSI disk geometries: weird probe defaults are faster than custom!
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Organization: St. Peter's College, US
Date: Thu, 4 Jan 1996 00:36:33 GMT
Message-ID: <1996Jan3.193633.1@spcvxb.spc.edu>
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[newsgroups trimmed]
In article <4cf25e$m82@olympus.nwnet.net>, aad@nwnet.net (Anthony D'Atri) writes:
> I discovered that when I newfs'd C partitions, dumpfs complained about
> there not being room for the rotation tables.
I don't know about this. I know that 2.x has made it a lot harder to define
a mount point for the C partition in disksetup. I just create an A partition
that spans the whole disk.
> This led me to discover that
> when one has disksetup [P]robe a disk, it defines the geometry to be fairly
> bizarre. For example, it reports a ~2G Seagate ST32250N as having
> 2048 sectors/track, 1 head, and 2048 cylinders.
This change was made to create equal-sized cylinders. Most disks are zone-
recorded these days. Under 1.0, this caused disksetup to think the disk was
bigger than it really was.
Terry Kennedy Operations Manager, Academic Computing
terry@spcvxa.spc.edu St. Peter's College, Jersey City, NJ USA
+1 201 915 9381 (voice) +1 201 435-3662 (FAX)