Duck wrote:
dwc wrote:
I just want to make sure using one of these external IDE to USB 2.0
converters is going to be fast enough. I expect it is, but just wanted
feedback in case not.
Thanks,
Dan
this is the one I've ordered:
http://www.newegg.com/Product/Product.asp?Item=N82E16817145131
i've got a similar model:
http://www.newegg.com/Product/Product.asp?Item=N82E16817145125
connected to a genuine usb 2.0 ehci controller on my suse 9.1
laptop. (it's important to hook it up to a 2.0 controller;
you'll probably get about 10% of this speed using a USB1.0
host.)
with a seagate 7200.7 installed in it, i get this:
$ sudo hdparm -t /dev/sda
/dev/sda:
Timing buffered disk reads: 74 MB in 3.02 seconds = 24.52 MB/sec
and for reference, i get this on my 5400 rpm ide root drive:
$ sudo hdparm -t /dev/hda
/dev/hda:
Timing buffered disk reads: 100 MB in 3.02 seconds = 33.08 MB/sec
This sort of testing is very chipset and driver dependent; I got 36
MB/sec out of my USB2 7200rpm drive on my T40 running SuSE 9.3 or XP,
but that same drive on my Mandrake 10.1 server gets lousy performance:
/dev/hda:
Timing buffered disk reads: 102 MB in 3.08 seconds = 33.12 MB/sec
/dev/hdc:
Timing buffered disk reads: 130 MB in 3.01 seconds = 43.19 MB/sec
/dev/sda:
Timing buffered disk reads: 56 MB in 3.01 seconds = 18.60 MB/sec
Linux USB is still pretty immature in my opinion, and I'd test carefully
before trying it in production; I've had plenty of filesystem
corruption, kernel panics, and nastiness like system load of 14 while
writing to the drive. On the other hand, that /dev/sda drive is reliable
as long as I don't use it much.
--
Jack At Monkeynoodle Dot Org: It's A Scientific Venture!
"I spent all me tin with the ladies drinking gin
so across the Western ocean I must wander" -- trad.
_______________________________________________
Discuss mailing list
[email protected]
http://lists.slimdevices.com/lists/listinfo/discuss
