From: Paul Bristow <paul@paulbristow.net>
To: Miles Lane <miles.lane@attbi.com>
Cc: Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Dont understand hdc=ide-scsi behaviour.
Date: Fri, 20 Sep 2002 20:44:38 +0200 [thread overview]
Message-ID: <3D8B6C96.6080406@paulbristow.net> (raw)
In-Reply-To: <1032533179.4526.102.camel@firehose.megapathdsl.net>
Use the line
hdc=ide-scsi hdd=ide-floppy
and all should be well, even if using ide-floppy as a module
Miles Lane wrote:
>On Thu, 2002-09-19 at 23:46, Brad Hards wrote:
>
>
>>-----BEGIN PGP SIGNED MESSAGE-----
>>Hash: SHA1
>>
>>On Fri, 20 Sep 2002 07:08, Reg Clemens wrote:
>>
>>
>>>I dont understand the behaviour of kernel 2.4.18 (and probably all others)
>>>when I put the line
>>> hdc=ide-scsi
>>>on the load line.
>>>
>>>I would EXPECT to get the ide-scsi driver for hdc (my cdwriter) but instead
>>>get it for BOTH hdc and hdd, the cdwriter and the zip drive.
>>>
>>>After starting this way (with hdc=ide-scsi), I find that
>>> /dev/cdrom2 -> /dev/scd0
>>>and that to access the zip drive I have to use /dev/sda1 (or /dev/sda4)
>>>
>>>
>>There are two slightly different things happening, I think.
>>
>>1. When you say hdc=ide-scsi, you are telling the IDE system that you don't
>>want to use the normal IDE interfaces to userland (such as ide-cdrom), but
>>instead want all access to this device to be accessed through the SCSI
>>midlayer (and associated SCSI interfaces, like the sg and scd drivers). So
>>ide-scsi becomes the driver, instead of ide-cdrom. You should be able to see
>>this in /proc/ide/hdc/driver
>>
>>2. ide-scsi is greedy, and will grab any IDE device without a driver. ATAPI
>>floppy devices (hopefully) like your zip drive need the IDE floppy device
>>driver, which is probably not loaded. What does CONFIG_BLK_DEV_IDEFLOPPY
>>equal in your kernel config?
>>
>>
--
Paul
Email: paul@paulbristow.net
Web: http://paulbristow.net
ICQ: 11965223
prev parent reply other threads:[~2002-09-20 18:41 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-19 21:08 Reg Clemens
2002-09-20 0:04 ` Allan Duncan
2002-09-20 5:51 ` Andre Hedrick
2002-09-20 6:46 ` Brad Hards
2002-09-20 14:46 ` Miles Lane
2002-09-20 7:59 ` Brad Hards
2002-09-20 18:44 ` Paul Bristow [this message]
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