Re: UltraDMA/33 support?

Russell Coker - mailing lists account (bofh@snoopy.virtual.net.au)
Mon, 26 Jan 98 17:39:05 +1000


>Does Linux support UltraDMA/33 drives properly?

I've got an IBM UDMA/33 drive, but the motherboard doesn't support anything
faster than PIO mode 4 or DMA mode 2.

>I just bought a 4.3gig Quantum Fireball SE (the new one), and
>when I partitioned it, the partition table was all screwed up
>looking. The "begin" field did not match the "start" field.
>This drive's geometry is:

>C/H/S=14848/9/63

Here's the fdisk 'p' output from my 8.3gig IBM drive:

Disk /dev/hda: 255 heads, 63 sectors, 1027 cylinders
Units = cylinders of 16065 * 512 bytes

Device Boot Begin Start End Blocks Id System
/dev/hda1 1 1 131 1052226 83 Linux native /dev/hda2
132 132 147 128520 82 Linux swap
/dev/hda3 148 148 163 128520 82 Linux swap /dev/hda4
164 164 1027 6940080 5 Extended
/dev/hda5 164 164 418 2048256 83 Linux native /dev/hda6
419 419 533 923706 83 Linux native

It works OK for me, but I'm using LBA.

>Linux fdisk complains when starting up that this drive has a
>large cylinder count. Does this mean that I just raked out $330 for a drive
>I can't use in Linux?

I would expect it to work if you use LBA. I would have expected it to work
anyway, but I don't think that being forced to use LBA is a great limitation.

Russell Coker