Re: PROBLEM: 2.2.17 hangs when attempting to mount atapi cdrom Teac CD-540E

From: Jens Axboe (axboe@suse.de)
Date: Mon Oct 02 2000 - 11:58:08 EST

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In reply to: Serge Gavrilov: "PROBLEM: 2.2.17 hangs when attempting to mount atapi cdrom Teac CD-540E"
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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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Next message: Karsten Keil: "Re: test9-pre7 doesn't recognize HiSax ISDN card"
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