Re: Mixing IDE and IDE-SCSI emulation on a Channel

From: Willem van der Walt (willem_at_top.health.gov.za)
Date: 02/27/04

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    To: redhat-list@redhat.com
Date: Fri, 27 Feb 2004 16:10:09 +0200 (SAST)

    Hi,
    Try moving your cdrom (hdd) to the "hdb" position if posible.
    If you cannot due to some or other reason, double check the master/slave
    settings on the cdwriter and cdrom.

    If you really need to have the cdwriter seen as a cdrom on ide, you can
    always make another entry in your lilo.conf or grub.conf.
    The one you are using now, as you know, has an append hdc=ide-scsi entry.
    Make another entry for the same kernel under a different label without
    that
    entry.
    In one machine, i have a cdwriter where you have yours and a harddisk
    (ide) on hdd.
    I have no problems with that setup.
    Regards, Willem

    On Fri, 27 Feb 2004, Reuben D. Budiardja wrote:

    >
    > Hi all,
    > I recently put in a CD-RW drive in my system, and make it the master drive on
    > the secondary channel (hdc). The CD Rom drive that was already there becomes
    > the slave hdd.
    > Following the CD-Writing-Howto, I finally figure out how to use
    > cdrecord/xcdroast and that I have to use the CD-RW as a SCSI device using the
    > ide-scsi emulation module (the Redhat doc in redhat site is horrible and not
    > helping by the way).
    >
    > But I still can't figure out how to play regular CD player, or rip a CD to mp3
    > using grip on that CD-RW drive, which acts as if it were a SCSI device. No
    > problem, I thought, I just use the other CD-rom drive. However, when ripping
    > a CD, I notice that the performance is kinda slower than usual. For example,
    > lame would have to sit idle waiting for the ripping to complete, when usually
    > the ripping of 1 CD would complete and lame would be behind like 75 % of
    > completion.
    > Another problem, I have found the CD-ROM device to generate errore like below,
    > 2 times after I installed the CD-RW:
    >
    > kernel: hdd: ATAPI reset complete
    > kernel: hdd: irq timeout: status=0xd0 {Busy}
    > kernel: hdd: irq timeout: error=0xd0LastFailedSense 0x0d
    >
    > Once it makes the system hung intermittenly, it almost crashed the system. But
    > I managed to reboot and it seems that it fixed the problem (at least up till
    > now). I don't know if this just coincidence of has anything to do with the
    > newly installed CD-RW.
    >
    > So, no real quantitative assesment yet (not sure how to do that), but I am
    > wondering if mixing the IDE-SCSI simulated device (CD-RW) and IDE/ATAPi
    > device (CD-rom) in a single channel as Master and Slave would make my CD-ROM
    > slower and generate those problems.
    >
    > Any info / comments will be greatly appreciated.
    >
    > Thanks.
    > RDB
    > 

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