Big SCSI disk in NT 4 problem

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Donald R. Dahlquist

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Apr 28, 1998, 3:00:00 AM4/28/98
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I have checked the Adaptec web site and the MS Knowledge base and cannot
come up with a good solution to my problem.

According to the MS Knowledge base, NT supports very large disks, on the
tera-byte size. My problem is that NT can only see the first 8681MB of
my 9.1GB disk, a Micropolis 3391SS that is supposed to have 9.091 GB of
formatted space. Don't know off hand how many MB this is but it has to
be significantly greater than 8681MB.

I have an Adaptec AIC-7880 chip on the motherboard of my Toshiba 6200M.
I have tried disabling/enabling support for disks > 1GB and support for
INT13. About all I could affect was how large the partition was during
NT setup.

Does anyone know how I can get NT to see the full size of this disk?

Thanks,

Don
-------------------------
Donald R. Dahlquist
X Terminal Consulting
do...@XTerm.Com
(612) 645-0064

Fdecarlo

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Apr 28, 1998, 3:00:00 AM4/28/98
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There's no problem. Most hard disk manufacturers incorrectly define a megabyte
as 1 million bytes, but a megabyte (correctly defined by NT) is actually
1024*1024, or 1,048,576 bytes. Same thing is true for a gigabyte, defined as 1
billion bytes by disk manufacturers but the number is actually 1000 megabytes,
or 1,073,741,824.

So for a 9GB drive, the 8.68GB figure is about right.

Frank

>Subject: Big SCSI disk in NT 4 problem
>From: do...@xterm.com (Donald R. Dahlquist)
>Date: 4/28/98 7:40 AM Pacific Daylight Time
>Message-id: <3549e8c8...@news.mr.net>

Donald R. Dahlquist

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Apr 28, 1998, 3:00:00 AM4/28/98
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Frank,

Thanks for your reply. You are exactly right. I was upset about this
issue because I have two drives from the same manufacturer in the
workstation. I "thought" that the first was a 4.3 GB SCSI as that is a
common catalog size. However, in looking at the spec for this drive it
is specified to be a 4.55 GB drive. The 4.55 GB drive shows up as 4338
MB to NT. So, double 4338 and you get 8676 MB which is what NT reports
as the size for my 9.1 GB drive. So, the readings are entirely
consistent. I am not so concerned that it is off by a few percent. I
thought that I had "hit the wall" so to speak and that I couldn't get a
larger drive for this machine.

Don

fdec...@aol.com (Fdecarlo) wrote:

>There's no problem. Most hard disk manufacturers incorrectly define a megabyte
>as 1 million bytes, but a megabyte (correctly defined by NT) is actually
>1024*1024, or 1,048,576 bytes. Same thing is true for a gigabyte, defined as 1
>billion bytes by disk manufacturers but the number is actually 1000 megabytes,
>or 1,073,741,824.
>
>So for a 9GB drive, the 8.68GB figure is about right.
>
>Frank

jdwi...@ultranet.com

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Apr 30, 1998, 3:00:00 AM4/30/98
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The previous respondent was correct. I have presently 9 different SCSI hard
drives on my NT 4.0 machine and none of them actually come out to what the
manufacturer specs. You will not have any problem adding capacity to your
machine - I added a 23 gig Seagate drive and NT recognized the whole drive as
21.6 gigs.

In article <3549e8c8...@news.mr.net>#1/1,


Donald R. Dahlquist <do...@XTerm.Com> wrote:
>
> I have checked the Adaptec web site and the MS Knowledge base and cannot
> come up with a good solution to my problem.
>
> According to the MS Knowledge base, NT supports very large disks, on the
> tera-byte size. My problem is that NT can only see the first 8681MB of
> my 9.1GB disk, a Micropolis 3391SS that is supposed to have 9.091 GB of
> formatted space. Don't know off hand how many MB this is but it has to
> be significantly greater than 8681MB.
>
> I have an Adaptec AIC-7880 chip on the motherboard of my Toshiba 6200M.
> I have tried disabling/enabling support for disks > 1GB and support for
> INT13. About all I could affect was how large the partition was during
> NT setup.
>
> Does anyone know how I can get NT to see the full size of this disk?
>
> Thanks,
>
> Don

> -------------------------
> Donald R. Dahlquist
> X Terminal Consulting
> do...@XTerm.Com
> (612) 645-0064
>


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