Summary: 40 GB Seagate disk drive seen as 6.8 GB disk in Ultra 10

From: Tony Magtalas <>
Date: Mon Nov 03 2003 - 02:02:43 EST
The winning answer comes from Michael DeSimone
<>. The answer is in the Sun
Manager FAQ under Michael DeSimone's name. The hint is
to use the "dd" command to blow away the disk label in
the manners described at the bottom of this page. Then
use the "format" command to relabel the disk again.
Also, thanks for several people for letting me know
that they are either out of the office or on vacation

Original Question:

I just bought a Seagate Baracuda ATA IV Model
40 GB disk drive with a Sun barcode (PN 370-4419-03)
and trying to add it to my Ultra 10 workstation.
(OBP=3.25, running Solaris 2.9)
It is being used as a (2nd) slave disk.
When the system boots up, it sees the 2nd drive as
ST340016A, however the total capacity is only 6.8 GB
Does anybody know how to make this disk use the entire
40 GB disk? I've noticed while running format, it sees
it as ST340016A, # of cylinder is 12007, alt 2 hd 16
sector 63.
However when I looked at the Seagate website it says
the # of cylinder is 1023, Head=256, Sector 63
This is a Sun disk, PN 370-4419-03. Is there a problem
with the Sun formatter? (I am unable to reformat this
disk in an Ultra 10). Any feedback would be greately

PS: I was able to make it into a 32.5 GB drive by
jumpering the 4th pin, and use the following command:
# dd if=/dev/zero bs=1b count=16 of=/dev/rdsk/c0t1d0s2
and newfs it. But this is a 40 GB disk drive. I still
haven't figured out how to make it into a 40 GB drive
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Received on Mon Nov 3 02:07:18 2003

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