Gentoo Archives: gentoo-user

From: Trenton Adams <trenton.d.adams@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] usb1 performance out of usb2 external HD
Date: Tue, 17 Jan 2006 00:47:30
Message-Id: 9b1675090601161643i2f4da90fpf4e9653f89c7ca9b@mail.gmail.com
In Reply to: Re: [gentoo-user] usb1 performance out of usb2 external HD by Iain Buchanan
1 On 1/16/06, Iain Buchanan <iaindb@××××××××××××.au> wrote:
2 > On Mon, 2006-01-16 at 10:46 -0700, Trenton Adams wrote:
3 > > Are you mounting with the "sync" option, or no? Try it with, and
4 > > without. If you do it without, time what it takes to do the copy, and
5 > > unmount. unmount will do the actual sync.
6 >
7 > hey, that sped it up heaps!
8 >
9 > $ sudo mount -t vfat -o uid=iain,gid=users,async /dev/sdd6 /mnt/tmp/
10 > $ time { cp /usr/portage/distfiles/OOo_2.0.1_LinuxIntel_install.tar.gz /mnt/tmp/; sudo umount /mnt/tmp/; }
11 >
12 > real 0m11.134s
13 >
14 > thats a huge increase (11s instead of 81s!), so how come hdparm still
15 > reports 9MB/s?
16 >
17 > > I've noticed that linux in generall is extremely slow with USB devices
18 > > sometimes. My external USB2 (ATA 100) drive gets 27M/sec on my
19 > > machine. And with a relatively new driver, you should see speeds
20 > > about like that.
21 >
22 > Is that calculating the times yourself, or with hdparm?
23
24 Yes, calculating myself. And I don't know why hdparm would report
25 that other time.
26
27 >
28 > thanks,
29 > --
30 > Iain Buchanan <iaindb at netspace dot net dot au>
31 >
32 > I've had a perfectly wonderful evening. But this wasn't it.
33 > -- Groucho Marx
34 >
35 > --
36 > gentoo-user@g.o mailing list
37 >
38 >
39
40 --
41 gentoo-user@g.o mailing list