On Saturday 18 February 2006 12:15, Gene Heskett wrote:
> On Saturday 18 February 2006 07:06, Christoph Hellwig wrote:
>
> cat /proc/sys/dev/cdrom/info
> CD-ROM information, Id: cdrom.c 3.20 2003/12/17
>
> drive name: hdc
> drive speed: 48
> drive # of slots: 1
> Can close tray: 1
> Can open tray: 1
> Can lock tray: 1
> Can change speed: 1
> Can select disk: 0
> Can read multisession: 1
> Can read MCN: 1
> Reports media changed: 1
> Can play audio: 1
> Can write CD-R: 1
> Can write CD-RW: 1
> Can read DVD: 1
> Can write DVD-R: 1
> Can write DVD-RAM: 0
> Can read MRW: 1
> Can write MRW: 1
> Can write RAM: 1
Ah, so it does already exist. Only thing left might be to stick the
manufacturer, serial and misc. data into sysfs
> But I fail to see where this would help to 'find' the right device to
> write to, other than the obvious prefixing of '/dev/' to $drive name.
> We already knew that, and in fact it works very well. Please explain to
> Joerg in one syllable words he might, if he wanted to, understand.
Well, in this case I'm actually trying to work with Joerg to produce a patch
that unifies the ATAPI and SCSI busses inside his program. One thing this
does is help to locate available drives. Negates the need to scan the entire
ATA/ATAPI bus for drives. However, since, as Joerg has pointed out, libscg is
a generic SCSI system, it doesn't negate it's need to scan the entire SCSI
bus. It's use as a backend to cdrecord is incidental in this case.
> Also, I'm fuzzy about the last 3, so defining those might help me
> understand.
I've seen the "MRW" stuff in some of the specs, but had to check the net to
find out what it was. MRW is the Mt. Rainier format - basic support was added
by Jens back in 2.4.19 according to the archives.
(http://www.ussg.iu.edu/hypermail/linux/kernel/0203.2/1214.html)
I'm not positive, but the "Can Read RAM" line might refer to DVD-RAM type
discs
DRH
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