[CentOS] slow usb hard disk performance.
Syv Ritch
centos at 911networks.com
Mon Dec 5 15:59:50 UTC 2005
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 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.
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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