[Posted and mailed]
> I have a problem: fdisk(linux) and partition magic(dos) both fail at
> various stages when trying to partition and format a Seagate Medalist
> Pro 6.4GB.
> I have a hunch that the problem is related to the fact that my bios
> insists on
> LBA chs=784,255,63 lba mode
> whereas the seagate manual lists
> LBA chs=833,240,63 lba mode
Nope. That's not the problem -- at least, not in quite the way I suspect
you think it might be. The EIDE hard drive will report its geometry in
some way or other -- with a 6.4GB drive, it'll have more than 1024
cylinders. The BIOS will then re-map that CHS geometry *HOWEVER IT SEES
FIT*. This is normal, and means that the re-mapped geometry reported in
the hard drive's manual is only what the hard disk manufacturer GUESSES
the BIOS MAY do. It should not be taken as authoritative on that matter.
Quote:> The "actual" geometry is chs=13328,15,63. The failure mode is not the
> same for pm and fdisk, but for example pm will freeze at 31% finished
> when formatting some pn that I created. Fdisk otoh complains about
> illegal entries for the extended partition.
The fact that Partition Magic freezes tends to suggest that the drive may
be physically damaged in some way -- but this isn't definitive. It could
be freezing because of a bad MBR and a bug in the program. A bad MBR
could also explain Linux fdisk's error message.
Therefore, what I'd suggest doing is this: Delete *ALL* the partitions
from the drive and use DOS's FDISK to re-write the MBR. Do this with an
"FDISK /MBR" command. I believe that Caldera's OpenDOS FDISK allows you
to do this from a command within the FDISK program. Then create your
partitions with DOS's FDISK, Partition Magic, or Linux's fdisk. If the
problem was a bad MBR, you should have no problems at this point. I'd
strongly recommend using some error-detection options when formatting the
partitions, though. See the man pages to mke2fs to find out how to do
this on ext2 partitions. I believe that both Partition Magic and Win95's
FORMAT command do this by default.
Rod Smith Author of:
http://www.users.fast.net/~rodsmith "OS/2 Soundcard Summary"
NOTE: Remove the digit and following word from my address to mail me