Peter Farrow wrote:
> Dear All,
>
> I tried a USB2 Maxtor One touch II external hard disk on a couple of
> my Centos 4.2 boxes and found it initiallised the SCSI subsystem ok
> and added device "sda". But the performance is miserable, yet the
> same hardware running XP the performance is satisfactory.
>
> HDPARM gives results varying from 120k/sec to , at its peak 4.75M/s on
> a USB 2 machine, still very poor by any stretch.
>
> On a twin CPU USB 1 machine it give a steady 1M/sec, which is
> consistently slow, which is better than erratically slow ( :-) )
>
> Still dog slow, wondered if anyone has seen this, and wondered if the
> firewire interface would be better? (I need to get a cable to try this).
I back up weekly to a Maxtor OneTouch (original) USB2-connected hard
drive. This happens while I sleep but it looks like last Wednesday
morning, it took 36 minutes to to copy 19GB.
[root at mavis ~]# du -hs /media/OTOT/2005-11-30
19G /media/OTOT/2005-11-30
[root at mavis ~]#
[rj at mavis ~]$ cat backup_progress_2005-11-30
Wed Nov 30 02:02:07 CST 2005 Removing /media/OTOT/2005-11-09
Backup to /media/OTOT/2005-11-30 Started at Wed Nov 30 02:06:13 CST 2005
Wed Nov 30 02:06:14 CST 2005 Completed: /bin
Wed Nov 30 02:06:15 CST 2005 Completed: /boot
<snip>
Wed Nov 30 02:42:14 CST 2005 Completed: /var
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sdb2 152206916 132579164 11896072 92% /media/OTOT
/dev/sdb2 successfully unmounted from /media/OTOT
All Finished at Wed Nov 30 02:42:14 CST 2005
Looks like that averages out to about 8.8MB/sec
I'm running an Athlon 2600+, 2GHz, 512MB on an ASUS A7N8X.
I hope this helps.