Comment 201 for bug 197762
Revision history for this message
| mlx (myxal-mxl) wrote Re: file transfers on USB disk are very slow | #201 |
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1b1ed1a
(Get the code!)
@ 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