22 Jan
2007
22 Jan
'07
6:03 a.m.
Last time I
looked, NetBSD, at least, couldn't do anything sensible
with a SCSI disk with other than 512-byte blocks. That was quite a
while ago, but I haven't heard anything on the lists to make me
think the status has changed.
The thing that got me wondering though - surely in
the PC world, SCSI
CDROM drives all use something like 2048-byte blocks? They're still mass storage devices - albeit
removeable ones - and so
presumably the low level code *has* to be capable of working with
"odd" block sizes.
Sufficiently low level, yes. The common SCSI code that both cd and sd
use, that isn't what's causing the trouble. The problems are either in
the disk subsystem assuming DEV_BSIZE sectors or the sd driver assuming
that. (If the former, the cd driver must be faking it.)
The suggestion of using whatever generic SCSI facilities are available
strikes me as a good one. If I had the time and interest I'd hack
something together myself to do that.
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