slow usb hard disk performance.

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Robert wrote:
> 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@mavis ~]# du -hs /media/OTOT/2005-11-30
>    19G     /media/OTOT/2005-11-30
>    [root@mavis ~]#
> 
>    [rj@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.

No, not at all. What's the setup?
How is the USB configured?
How's the drive configured, formatted ext3, vfat...

-- 
Thanks
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