On Thu, 28 Jan 1999, Tobias Richter wrote:
> You ([EMAIL PROTECTED]) wrote:
> > cfdisk correctly reads the partition table and identifies one partition,
> > formattted hpfs.
> >
> > I tried varius ways of mounting to no avail. I suspect the problem here is
> > IBM's trickery. For these drives there's a filter driver that reads 2K
> > sectors and passes them out in 512 byte chunks. All the other software
> > views the drive as being formatted with 512 byte sectors. I imagine this
> > has implications for device addressing and could well stuff up the Linux
> > HPFS driver.
>
> So I would syspect that Linux' hpfs driver isn't doing these quirks.
>
> > This information reinforces my view that Linux' driver needs to get the
> > device capacity information whenever there's a media change.
>
> I have no idea why you believe this based on the above facts.
You trimmed the relevant facts what are these:
1 I can read the 640 Mb disk if i boot with one in the drive. ailure to
navigate the HPFS filesystem is not a failute to read the disk. There are
no data overruns.
2 I cannot read the 640 Mb disk if i boot without one in the drive. I get
data overruns.
Conclusion: procssing differs depending on which disk is in the drive at
boot time and consequent initialisation. As the drive capacity is reported
at boot time and not subsequently, I further conclude the drive capacity is
NOT recalculated when the media changes.
>
> Try making and mounting an ext2 filesystem on that MO drive.
As I can't read any data from the 640 Mb disks unless I boot with one in
the drive, I see no point in this. To create a filesystem I must be
able to partition table. To read the filesystem I must be able to read the
partition table, This I cannot do unless I boot with a 640 Mb disk in the
drive. Rebooting to change media type is not convenient. I can do better on
OS/2 and even NT
--
Cheers
John Summerfield
http://os2.ami.com.au/os2/ for OS/2 support.
Configuration, networking, combined IBM ftpsites index.
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