Messages in this thread | | | Date | Fri, 23 Jan 2004 23:10:01 +0100 (CET) | From | "Maciej W. Rozycki" <> | Subject | Re: [PATCH] make ide-cd handle non-2kB sector sizes |
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On Fri, 23 Jan 2004, Pascal Schmidt wrote:
> > So that's just opposite to what ide-cd does, but I think ide-cd should be > > limited to CD-like devices with their all properties (oddities). > > When I brought up the issue a few months back, the consensus was to > use ide-cd, not ide-floppy.
Interesting. I would consider ide-floppy (despite its somewhat inadequate name) the driver for all ATAPI disks as opposed to ATA disks that use ide-disk. CD-like devices are much different, supporting such alien to disk devices entities like tracks or audio reading or playing.
BTW, does ide-cd support partition tables yet? You typically want them for MO disks if you want to transport data to/from other OSes or simply because their space is big enough to create separate filesystems for certain applications. Or perhaps swap space even. ;-)
> > Specifically you can do random writes to an MO disk, perhaps even format > > it, which is usually not the case with CDs. > > ide-cd also handles DVD-RAM, which can also handle random writes.
Well, an exception rather than a rule. ;-)
> > BTW, what does ide-scsi say of the device type for the MO: is it "CD-ROM" > > or "Direct-Access" or anything else? I used an MO drive (a SCSI one -- > > nobody was crazy enough to think of an ATAPI interface for that kinds of > > devices at that time) for a short while under Linux once and it used to be > > the latter, with sd, not sr being the appropriate driver. > > On 2.4: > > scsi0 : SCSI host adapter emulation for IDE ATAPI devices > Vendor: FUJITSU Model: M25-MCC3064AP Rev: 0051 > Type: Optical Device ANSI SCSI revision: 02 > > And yes, this uses the sd driver.
I see -- that's reasonable. And I can't understand the proposed inconsistency with drivers -- why it should be a CD when being an ATAPI device and a disk when being a SCSI one? After all SCSI has a separate driver for CDs as well...
Maciej
-- + Maciej W. Rozycki, Technical University of Gdansk, Poland + +--------------------------------------------------------------+ + e-mail: macro@ds2.pg.gda.pl, PGP key available + - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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