SUMMARY: format.dat for SEAGATE ST42100

From: Per Akesson (pj@carmenta.se)
Date: Mon Oct 03 1994 - 07:33:58 CDT


This is a summary of the responeses I got for my request
of a format.dat entry for the SEAGATE ST42100[N] disk.

I got three answers of actual entries, but none of them
worked. Upon booting I got the following message:

        unix: corrupt label - bad geometry
        unix: Label says 3746625 blocks, Drive says 3711990 blocks
        unix: Vendor 'SEAGATE', product 'ST42100', 3711990 512 byte blocks

When I tried to label the disk I got SCSI error, "unable to write VTOC"
or something. Even the local suppliers entry didn't make it. The solution
was given by Eckhard Rueggeberg who suggested the following:

        Create a dummy label, like 1 cyl 1 head 1 sec, and let
        scsiping ask the drive itself for parameters then. Nobody
        knows better.

The suggested entry by `scsiping' could then be used for labbeling the
disk without any reported errors. The values in the entry differs rather
much from the others I've tried.

This is the entry that worked:

disk_type = "Seagate ST42100N" \
        : ctlr = SCSI : fmt_time = 4 \
        : rpm = 3530 : bpt = 40000 \
        : nsect = 88 : ncyl = 2810 : pcyl = 2574 : nhead = 15 \
        : acyl = 2 : atrks = 30 : trks_zone = 1 : asect = 1

partition = "Seagate ST42100N" \
        : disk = "Seagate ST42100N" : ctlr = "SCSI" \
        : 2 = 0, 3709200

Thanks to all of you that answered.

Best Regards

  Per Åkesson
  Carmenta AB
  SWEDEN



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