[ltp] Re: External USB drive

[Paul Ionescu]

Hi Socas,

Most probably, you put your hard on the USB 1.1 port of T30.
And USB 1.1 is 12Mbit.

On Thu, 19 Aug 2004 11:23:11 -0600, Hector Socas Navarro wrote:

> Hi folks,
> 
> 	I recently purchased a 200Gb extrenal hard drive (USB 2). When I
> started using it I found it painfully slow so I used hdparm to test its
> speed:
> 
> [root@sauron root]# hdparm -Tt /dev/sda
> 
> /dev/sda:
>   Timing buffer-cache reads:   128 MB in  0.38 seconds =336.84 MB/sec
>   Timing buffered disk reads:  64 MB in 93.69 seconds =699.50 kB/sec
> 
> Something's very wrong here. I should be getting ~40 MB/sec, right? The
> usual hdparm options don't work because a USB drive is treated as a SCSI
> disk. Does anybody know why I'm getting this poor performance or how to
> fix it?
> 
> I'm running RedHat 7.3 with some updates and kernel 2.4.22 on a T30
> 
> Thanks in advance!
> 
> Hector
> 
> -- 
>                        Hector Socas-Navarro
>                      High Altitude Observatory
>            3450 Mitchell Lane, Boulder CO 80307-3000 (USA)
> Phone: 303 497 1543, Fax: 303 497 1589, E-mail: navarro@hao.ucar.edu