SUMMARY:A 9G HD is configured with only 8.48 G, why?

From: Chin Fang (fangchin@leland.Stanford.EDU)
Date: Mon Jun 21 1999 - 14:49:56 CDT

Dear fellow Sun Managers,

First of all, many thanks to the following Sun Managers who took the
time and responded to my post.

Kevin Sheehan <>
Brion Leary <>
Klorese, Roger B.A. <>
Viet Hoang <>
Matthew Atkinson <>
Marc L. Summers <>
David Evans <>

Secondly, I will try not to work on Sunday evening again :) I should
have thought about digging out a Sun 9Gbyte 10K Disk Drive Specifications
pamphlet (I have one on my desk right now) and read the capacity data
first before I made the post (as David Evens "kindly" reminded me about).

Indeed, it's a mixed up of jargon used by disk vendors.

The Seagate Cheetach 10000 RPM 9G drive, according to the Sun data, has
formatted capacity 9,090,874,368 bytes minimum. That translates to
8.4665 Gbytes.

So, the message that I got 8.48 actually had some upside!


Chin Fang

Original question:

Dear fellow Sun Managers,

Early this evening, I attempted to put in a brand new Segate ST39102LC
(Cheetach 10000 RPM) HD in an external Unipack HD enclosure, so that I
could format the new HD. The HD is not a Sun OEM-ed Segate. It's a unit
that we bought from Insight (aka Hard Drive International to oldtimers).

The Unipack enclosure is attached to a SS5 170Mhz running Solaris
2.5.1. At the ok prompt, probe-scsi-all showed the HD was recognized.
boot -r, and logged in as root, then format. The following message
showed up right afterwards:

c0t2d0: Configured with capcacity of 8.48G

I admit this is the first time I was trying to format a 9G HD using
a machine running Solaris 2.5.1. I had done so using a Ultra IIi box
running Solaris 7 a couple months back. I don't recall receiving such
messages at all.

So, how could I fully use the 9 G capacity with 2.5.1?

No, For now, upgrading OS is not feasible, not until at least a few
weeks from now. So, I would be very appreciative about any get around


Chin Fang

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