From: Jens Axboe <axboe@suse.de>
To: Pat LaVarre <p.lavarre@ieee.org>
Cc: linux-scsi@vger.kernel.org
Subject: Re: writable mmc profiles actually are writable
Date: Tue, 7 Oct 2003 09:00:44 +0200 [thread overview]
Message-ID: <20031007070044.GT972@suse.de> (raw)
In-Reply-To: <1065473899.6835.41.camel@patehci2>
On Mon, Oct 06 2003, Pat LaVarre wrote:
> > patches to make the detection more modern ...
>
> Below appears a copy of an old patch to try op x46 get_configuration any
> time mode page x2a doesn't already say the pdt x05 dvd/cd device is
> writable.
See my comments in another mail.
> > I haven't yet had to deal with dvd+rw or
> > ddcd_rw (is this like mtr?
>
> Sorry I do not know mtr.
mt rainier, different in spirit but allows the same 2kb writes and
handles the rest in hardware.
> > mo and dvd-ram have been supported for a long
> > time and should be set with CDC_DVD_RAM,
>
> Sorry I do not understand. I remember noticing CDC_MO_DRIVE appears
> only drivers/ide/ not in drivers/scsi/. Weakly I conclude mo doesn't
> work the same in atapi and usb-storage.
IIRC, scsi mo drives are handled by sd, not sr.
> > the disk profiles aren't driven by ide-cd or
> > sr.
>
> Sorry I do not understand.
>
> In drivers/scsi/sr.c I find:
> cd->cdi.mask |= CDC_DVD_RAM;
>
> In drivers/ide/ide-cd.c I find:
> devinfo->mask |= CDC_DVD_RAM;
>
> I conclude sr and ide-cd tell cdrom whether the device "profile" is
> writable or not. Is that wrong?
->mask is an inverted capability mask, so if you set CDC_DVD_RAM you
mask that capability.
--
Jens Axboe
next prev parent reply other threads:[~2003-10-07 7:00 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-22 22:55 [linux-usb-devel] Re: USB storage problems on OHCI Pat LaVarre
2003-09-29 14:54 ` Pat LaVarre
2003-09-29 15:50 ` 2 KiB/block loopback found where Pat LaVarre
2003-09-29 16:46 ` Jens Axboe
2003-09-29 17:12 ` Pat LaVarre
2003-09-29 20:02 ` Pat LaVarre
2003-10-06 17:12 ` max GiB written per boot Pat LaVarre
2003-10-06 18:12 ` writable mmc profiles actually are writable Pat LaVarre
2003-10-06 18:22 ` Jens Axboe
2003-10-06 18:25 ` Jens Axboe
2003-10-06 19:50 ` Pat LaVarre
2003-10-06 20:38 ` Jens Axboe
2003-10-06 20:58 ` Pat LaVarre
2003-10-06 22:14 ` Pat LaVarre
2003-10-06 23:56 ` Pat LaVarre
2003-10-07 5:38 ` Jens Axboe
2003-10-07 6:45 ` Matthew Dharm
2003-10-07 6:48 ` Jens Axboe
2003-10-07 7:00 ` Matthew Dharm
2003-10-07 7:04 ` Jens Axboe
2003-10-10 20:36 ` Pat LaVarre
2003-10-10 21:04 ` Pat LaVarre
2003-10-10 21:25 ` Pat LaVarre
2003-10-10 22:43 ` Pat LaVarre
2003-10-10 23:16 ` Pat LaVarre
2003-10-11 0:43 ` Pat LaVarre
2003-10-07 20:46 ` Pat LaVarre
2003-10-07 21:00 ` Jens Axboe
2003-10-09 23:01 ` Pat LaVarre
2003-10-07 7:00 ` Jens Axboe [this message]
2003-10-06 20:10 ` Pat LaVarre
2003-10-06 20:28 ` Jens Axboe
2003-10-06 20:21 ` Pat LaVarre
2003-10-06 20:33 ` Jens Axboe
2003-10-06 21:00 ` max GiB written per boot Pat LaVarre
2003-10-06 23:47 ` Pat LaVarre
2003-10-07 5:57 ` Jens Axboe
2003-10-07 22:12 ` Randy.Dunlap
2003-10-07 22:57 ` Willem Riede
2003-10-08 1:27 ` Randy.Dunlap
2003-10-08 4:34 ` Randy.Dunlap
2003-10-08 6:44 ` Jens Axboe
2003-10-09 21:59 ` Pat LaVarre
2003-10-10 20:54 ` Pat LaVarre
2003-10-07 0:51 ` 2 KiB/block loopback found where Pat LaVarre
2003-09-29 17:55 ` aligned /dev/scd$n reads less rare how Pat LaVarre
2003-09-29 19:39 ` zip of GiB cross-platform Pat LaVarre
2003-09-29 19:50 ` Matthew Wilcox
2003-09-29 19:56 ` Pat LaVarre
2003-10-24 14:41 ` aligned /dev/scd$n reads less rare how Pat LaVarre
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