@ Luis (#198): can you please post/link to the changes made to fstab? I
have no lines in fstab for USB drives, as DeviceKit is supposed to take
care of that.

@everyone having problems and still following: how many of you tried to
bypass the filesystem by using dd or hdparm -t?

Running Karmic amd64, I'm having ridiculously slow speeds just reading from 
3.5" HDD over USB (in the 3-8 MB/s range), right after bootup, using hdparm -t 
or dd'ing from to /dev/null:
$ sudo dd if=/dev/sdb  of=/dev/null count=1024 bs=32k
1024+0 records in
1024+0 records out
33554432 bytes (34 MB) copied, 7,03421 s, 4,8 MB/s
$ sudo hdparm -t /dev/sdb

/dev/sdb:
 Timing buffered disk reads:   18 MB in  3.29 seconds =   5.47 MB/sec

Hardware is Intel ICH8, the same gives me over 12MiB/s in Windows NT 5.2
and Hardy i386. The hard drive puts over 40 MiB/s over
ExpressCard->eSATA Silicon Image SiI 3132

** Attachment added: "dmesg.log"
   http://launchpadlibrarian.net/35947788/dmesg.log

-- 
file transfers on USB disk are very slow
https://bugs.launchpad.net/bugs/197762
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