Re: 2.4/2.6 - ATAPI Zip problem in SCSI mode (DEVFS)

From: Andrey Borzenkov (arvidjaar_at_mail.ru)
Date: 08/31/03

  • Next message: Greg KH: "Re: USB not working correctly in 2.6.0-test4-mm4" 
    To: Ali Akcaagac <aliakc@web.de>
Date:	Sun, 31 Aug 2003 21:17:42 +0400

    > The problem is that when having Linux booted and placing a Zip disk into
    > the drive then mounting doesn't work. It tells me that the device
    > doesn't exist. But the drive was found during boot
    >
    > So far so good on early 2.4 you simply cd into /dev/scsi.../.../ made an
    > 'ls' and voila it gave the device a kick and it created the entry for
    > the Zip disk you then can mount it (devfs).
    >
    > For 2.5 this doesn't work anymore and whenever you want to mount a Zip
    > disk you need to boot Linux together with a Disk inside the Drive, so
    > during boot it detects the Zip drive + the Disk.

    yes devfs was castrated in 2.6 and removable media revalidation has been
    removed without providing any suitable replacement.

    If you use devfsd and uncomment these lines in devfsd.conf

    # If you have removable media and want to force media revalidation when
    looking
    # up new or old compatibility names, uncomment the following lines
    # SCSI NEWCOMPAT /dev/sd/* names
    LOOKUP ^(sd/c[0-9]+b[0-9]+t[0-9]+u[0-9]+)p[0-9]+$ EXECUTE
    /bin/dd if=$mntpnt/\1 of=/dev/null count=1
    # SCSI OLDCOMPAT /dev/sd?? names
    LOOKUP ^(sd[a-z]+)[0-9]+$ EXECUTE /bin/dd if=$mntpnt/\1
    of=/dev/null count=1
    # IDE NEWCOMPAT /dev/ide/hd/* names
    LOOKUP ^(ide/hd/c[0-9]+b[0-9]+t[0-9]+u[0-9]+)p[0-9]+$ EXECUTE
    /bin/dd if=$mntpnt/\1 of=/dev/null count=1
    # IDE OLDCOMPAT /dev/hd?? names
    LOOKUP ^(hd[a-z])[0-9]+$ EXECUTE /bin/dd if=$mntpnt/\1
    of=/dev/null count=1

    devfsd will attempt media revalidation on access to /dev/sdaN; if you are
    using canonical devfs names you may add something similar to the above, e.g.

    LOOKUP (scsi/.*)/part[0-9]+ EXECUTE /bin/dd if=$mntpnt/$1/disc of=/dev/null
    count=1

    this should revalidate media on access to partition. But you won't get
    partition list on simple ls as in 2.4.

    -andrey
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  • Next message: Greg KH: "Re: USB not working correctly in 2.6.0-test4-mm4"

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