Re: ide-cd doesn't replace ide-scsi?

[Bill Davidsen <davidsen@tmr.com>]

Luke-Jr wrote:
> On Monday 28 November 2005 21:03, you wrote:
>
> > Luke-Jr wrote:
> >
> > > Note: results are with 2.6.13 (-gentoo-r4 + supermount) and 2.6.14
> > > (-gentoo) I've been struggling with burning DVD+R DL discs and upgrading
> > > the firmware on my DVD burner, and just today decided to rmmod ide-cd and
> > > try using ide-scsi. Turns out it works... so is ide-cd *supposed* to
> > > handle cases other than simple reading and burning or is this a bug? If
> > > not a bug, should ide-scsi really be marked as deprecated?
> > > Also, two bugs with ide-scsi:
> > > 1. On loading the module, it detects and allocates 6 SCSI devices for a
> > > single DVD burner (Toshiba ODD-DVD SD-R5272); kernel log for this event
> > > attached 2. On attempted unloading of the module, rmmod says 'Killed' and
> > > the module stays put, corrupt. There was some kind of error in dmesg, but
> > > it appears to have avoided syslog-- If I see it again, I'll save it.
> >
> > I think you may have the probe-all-LUNs set, and a CD burner which
> > responds to more than one. That's one possible cause for this.
>
>
> Yep, it was set. I'll try turning it off.
>
>
> > Unfortunately using ide-cd still doesn't have the code set to allow all
> > burning features to work if you are not root. Even if you have read+write
> > there's one command you need to do multi-session which is only allowed to
> > root. Works fine for single sessions, I guess that's all someone uses.
>
>
> I'm pretty sure I tried doing everything as root days before I even considered 
> ide-scsi... In regards to firmware upgrades, I wouldn't expect non-root to be 
> allowed to, even with rw access.

Actually, a single session burn seems to work (I'm doing tests as soon 
as I get a compile of the latest kernel). What doesn't (or didn't) work 
is multisession, even with r/w "cdrecord -msinfo" fails, which is how 
you get the starting info for the next session.
> > Haven't tried unloading the module, so I have no advice on that other than
> > "don't do that." 
>
>
> Well, I had reasons... =p
> The first time, I was going to switch back to ide-cd (for DMA), and the second 
> time was because the drive was stuck on Busy and I'm not sure of any (other?) 
> way to reset it without hotplugging the IDE power cable (which I'm sure isn't 
> a good idea and I don't want to risk).

I thought ide-scsi now did DMA, at least for data burns. Don't know 
about audio, I occasionally do an audio burn, but my main machine for 
burning uses ide-cd, so it's not an issue.

I saw a note somewhere about using capabilities on the cdrecord 
executable to allow the realtime sched to be set, but I don't seem to 
find it now. Maybe it was a question rather than an example :-(

--
bill davidsen <davidsen@tmr.com>
  CTO TMR Associates, Inc
  Doing interesting things with small computers since 1979
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