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From: Bela Lubkin <belal@sco.com>
Subject: Re: Drive Array Size Limitation - SCO 5.0.5
Date: Tue, 16 Mar 2004 21:41:32 GMT
Message-ID: <20040316214131.GK24746@sco.com> 
References: <4d30cee2.0403091104.4c37446d@posting.google.com> <pan.2004.03.10.02.58.22.527444@mcmillanandwife.com> <4d30cee2.0403100737.287ac7e7@posting.google.com> <20040312232735.GG24746@sco.com> <4d30cee2.0403160817.254a886@posting.google.com> 

Stephen C Young wrote:

> > > After I destroyed all data on the disks to reconfigure the array I
> > > added the two additional hard disks to the system and re-configured
> > > array for 5 disks using the Compaq SmartStart disk utilities. In the
> > > SmartStart utility it reads that total drive space is 45.5 GB and
> > > taking away the raid overhead usuable space is 36.4 GB. After
> > > configuring the array I booted to CD-rom and used the ida fd(64)
> > > volume disk to begin the install along with the necessary bootstring
> > > options and went through screen of entering in license info and system
> > > name and etc. However, when I come to divvy it only shows 17.7 GB of
> > > space to be divided up. Even completed entire install to see if hard
> > > drive space number shown was maybe stuck in bios and that system would
> > > see the additional hard drive space after completing install, but that
> > > did not work either. Any other help would be appreciated. Thanks

> Output of command 'cat /dev/string/cfg':

> %disk     -               -   -  type=IDA0 unit=0 cyls=4355 hds=255 secs=32
> 
> Output of command 'dparam /dev/rhd00':
> 4355 255 0 0 0 0 0 32
> 
> Output of command 'fdisk -p -f /dev/rhd00':
> 1 1 1110269 1110269 UNIX Active
> 
> Output of command 'divvy -P -N /dev/rhd00':
> 0              0                   15359                   boot  EAFS
> 1                  15360           209919          swap  NON FS
> 2          209920           17674549       root  HTFS
> 6          17674550        17674559        recover       NON FS
> 7              0                   17764303        hd0a  WHOLE DISK
> 
> Output of command 'divvy -S /dev/rhd00':
> Partition size is 17764304 1K blocks

Ok, well this is all self-consistent and shows a 17GB drive size.

There is one possibility that comes to mind.  OpenServer can store its
idea of drive geometry into the masterboot sector; if this drive was so
stamped, it's possible the stamp would have survived through all the
reconfiguration.  I'm not even sure that the IDA driver pays attention
to that stamp, but it's definitely worth trying this.

So, what you need is a command that will wipe out the masterboot sector
of this drive.  Doing so will of course wipe out all data on the disk;
you'll have to reinstall from scratch.

To wipe out the masterboot sector on your root drive:

   DANGER!--   dd if=/dev/zero of=/dev/rhd00 count=1   --!DANGER

Then reinstall.

You'll know very early in the reinstall process whether this helped.
Look for the "%disk... IDA0" line.  Hopefully the geometry will have
expanded -- you should see something like 4355/255/63 or 9000/255/32.
If you still see 4355/255/32 then there's something wrong with the IDA
configuration, check it carefully in the SmartStart disk utilities.

>Bela<

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