Where's /dev/sda4?

[Alastair Neil]

On 1/24/07, David Levner <davidlevner at yahoo.com> wrote:
>
> On Tue, 2007-01-23 at 17:40 -0800, David Levner wrote:
> > I have Fedora Core 5 running on a Lenovo T60. I'm trying to access a
> > zip drive, and the instructions from Iomega's web site say to use a
> > mount command with the device /dev/sda4. But I don't see /dev/sda4 on
> > my system.
>
> Thanks to David Chipman and Tim for their suggestions, I've been able to
> make some progress. Using David's suggestion (dmesg | grep sd), I found that
> the device I'm looking for is /dev/sdb. I found messages like these:
>
> sdb: Spinning up disk......ready
> SCSI device sdb: 489532 512-byte hdwr sectors (251 MB)
> sdb: Write Protect is off
> sdb: Mode Sense: 45 00 10 08
> sdb: assuming drive cache: write through
> sdb:<5>audit(1169598497.790:214): avc:  granted { execmem } for pid=2632
> comm="nautilus" scontext=user_u:system_r:unconfined_t:s0
> tcontext=user_u:system_r:unconfined_t:s0 tclass=process
> sd 4:0:0:0 SCSI error: return code = 0x8000002
> sdb: Current: sense key: Medium Error
> end_request: I/O error, dev sdb, sector 0
> (the last three lines were repeated two more times, and then ...)
> sd 4:0:0:0: Attached scsi removable disk sdb
> sd 4:0:0:0: Attached scsi generic sg1 type 0
>
> These message were repeated, with the addition that the second time around
> I got "Buffer I/O error on device sdb, logical block 0".
>
> I'm not sure how serious these errors are. The zip drive and disk work
> fine under Windows 2000.
>
> So I followed David Chipman's advice about not following advice literally.
> I tried to mount the drive:
>
> $ mount -t vfat /dev/sdb /media/zip
>
> (By the way, I am logged in as root through su, and I created the
> directory /media/zip previously.)
>
> The command returned this:
>
> mount: wrong fs type, bad option, bad superblock on /dev/sdb,
>            missing codepage or other error
>            In some cases, useful info is found in syslog - try
>            dmesg | tail  or so
>
> $ dmesg | tail
> ...
> FAT: invalid media value (0x6d)
> VFS: Can't find a valid FAT filesystem on dev sdb.
>
> OK. Then I tried Tim's suggestion:
>
> $ /sbin/fdisk -l
>
> Disk /dev/sda: 80.0 GB, 80026361856 bytes
> 255 heads, 63 sectors/track, 9729 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
>
>    Device Boot       Start       End      Blocks    Id   System
> /dev/sda1    *              1         13      104391   83   Linux
> /dev/sda2                  14     9729   78043770   8e   Linux LVM
>
> ... and then the zip drive made a noise and the screen hung. I started
> typing this e-mail. Several minutes later, the zip drive made a noise again
> and the shell's prompt returned.
>
> Do the errors indicate a bad disk? Do I need to change /etc/fstab? Any
> other ideas?
>
> David Levner
> --
>


The standard zip disk formatting was to put the data in the fourth partition
- so you should be looking for /dev/sdb4.  This is  the same scheme that
many usb thumbdrives use.
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