I have 3 computers now running 9.04, an IBM Thinkpad, a Compaq Presario
A900, and an HP Desktop. Previously, running Ubuntu 7.10, and 8.10 I was
able to make use of my external USB hard drives on each of these
systems. I have 10 external drives, all formatted NTFS, with sizes of
(1) 30GB, (1) 60GB, (2) 250GB, (3) 320GB, and (3) 500GB. None of the
drives will mount under 9.04, and I see nothing obvious in dmesg,
nothing in /etc or /media when I attempt to mount any of them. A friend
who has 9.04 installed on his Compaq notebook came by and found he too
could not mount any of the drives. Memory sticks (Kingston) and a no
name brand mount with no problems. I also attempted to look at the
drives using System-Administration-Partition Editor, which does not see
the drives initially or even after running refresh several times.
Booting with the Live GParted CD I was able to see one of the drives, so
I tried formatting it as an ext3 file system, and then booting 9.04
found it still would not mount. I retried this 6 times with IRC help on
line to assure I was doing everything correctly, still with no success.
Finally I used the Live GParted CD to reformat the drive to NTFS, and
rebooted the system after which I found the drive would mount as
/dev/sdf1 with an entry in /media/New Volume on the system so I copied
about 45GB of files to the drive and then unmounted it. I then plugged
the drive into one of the other systems and it mounted as /dev/sdc1 and
/media/New Volume, and then unmounted the drive and set it aside. The
following day I tried to mount the drive once again, and found it would
not mount on any of the systems with no indication why as previously.
Googling, I found others having mount problems and tried their
solutions, power the drive up first, then plug it in, plug it in first
and then power on, have the drive ready prior to booting the system,
etc. but nothing helped.

I'm totally lost as to what the solution is for this problem, and have
tried everything I can think of, different power blocks, different USB
cables, different drives, different file system. The only thing which
has remained constant is the OS on each of the 4 computers I attempted
to mount the drives. Could this possibly be an Ubuntu 9.04 problem? And
if so, where might I find information which could be helpful in
resolving it?

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unable to mount seagate st300003u2 usb drive
https://bugs.launchpad.net/bugs/377297
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