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SubjectRe: PROBLEM: 2.2.17 hangs when attempting to mount atapi cdrom Teac CD-540E
On Mon, Oct 02 2000, Serge Gavrilov wrote:
> [1.] 2.2.17 hangs when attempting to mount atapi cdrom Teac CD-540E
>
> [2.] My kernel was compiled with flags
>
> CONFIG_BLK_DEV_IDEPCI=y
> CONFIG_BLK_DEV_IDEDMA=y
> CONFIG_IDEDMA_AUTO=y
>
> My cdrom Teac CD-540E supports UDMA mode2.
> When I try to mount /cdrom kernel hangs.
> If I invoke
>
> hdparm -d0 /dev/hdc
>
> and invoke "mount /cdrom" after, then everything is OK.

What IDE chipset? Note that not all of them support DMA with ATAPI at
the moment. And also note that even if your CD-ROM claims to support
UDMA, it doesn't necessarily mean that it does in reality...

--
* Jens Axboe <axboe@suse.de>
* SuSE Labs
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