Re: Compaq Evo n800w
From: Jean-Pierre Radley (jpr_at_jpr.com)
Date: 11/27/03
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Date: 26 Nov 2003 22:20:12 -0500
Bela Lubkin typed (on Wed, Nov 26, 2003 at 09:28:40AM +0000):
| Jean-Pierre Radley wrote:
| > Bela Lubkin typed (on Tue, Nov 25, 2003 at 08:25:50AM +0000):
|
| > | The recipe in that article should work. Boot with "tools
| > | disable=cha,ciss" to start it off.
| >
| > Thanks, Bela, that opened the door.
| >
| > While this laptop has a 60Gb hard drive, after telling OSR 5.0.7 at
| > installation to use the entire disk for Unix, it presented me with a
| > divvy table with 27.6 GB of blocks -- I seem to have lost half of the
| > disk.
|
| What geometry does it show for the disk?
|
| It's probably wrong. Thus, a candidate for the "Wd Driver Supplement".
| The readme mentions:
|
| * Better disk geometry configuration.
|
| which in this case means "probably won't get the stupid wrong geometry
| it used to get".
|
| If you install the supplement, your disk's geometry will change. In the
| past this would have made it unbootable, but the supplement also
| supplies changes that make OSR5 much less sensitive to geometry issues
| (these changes apply to SCSI as well as IDE). (*)
|
| Once installed, the disk geometry will change, but the size of your Unix
| partition will not. You can add a second Unix partition to use the rest
| of the space. You can also expand the existing one, provided it is the
| only or physically last partition on the disk. OSR5 `fdisk` doesn't
| make this very easy: you can't just change the partition's end-block (as
| you can in `divvy`). Instead you have to delete and re-add the
| partition, an operation that you should perform with the utmost care.
|
| There is one convenient escape hatch. If the partition was originally
| created with "Use Entire Disk for UNIX", it will start on track 1 and
| end wherever the disk used to end. In that case you can again choose
| "Use Entire Disk for UNIX". The new partition exactly overlays the old
| one.
|
| For any future readers: we're talking about brain surgery here. It's
| easy enough if you know what you're doing; it's very dangerous if you
| are uncertain. I know that JP knows how to work this stuff; I also know
| that he's talking about a machine that has just been installed and
| cannot have much valuable stuff on it to be destroyed...
Great! With all your help, Bela, between the defbootstr paramaters, and
installing MP1 and UP1 and then wdsupp, I got fdisk to show me all 60 GB
of the hard drive.
That left me with a divvy table that was using half the full-disk
partition. I thought that instead of fiddling with divvy start/end
values on existing filesystems (though really only root and stand had
any data on them), it would be more prudent to take a different tack.
The laptop has a CD/DVD writer, so I made a bootable CD using
RecoverEDGE, and I'm in the process of backing up the system across the
etherknot to a tape on a desktop machine. Once that's done, I'll boot
from the RecoverEDGE CD, change the divvy table, and read back the tape.
-- JP
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