On Tue, 11 Oct 2005 17:27:27 -0600 (MDT)
Jeff Ross <[EMAIL PROTECTED]> wrote:
: I've got a USB external drive that is virtually unusable because it
: is so slow.
:
[snip]
: (write a file to the usb drive)
:
: time sudo dd if=/dev/zero of=/usb_drive/test_file count=1000000
:
: 1000000+0 records in
: 1000000+0 records out
: 512000000 bytes transferred in 452.234 secs (1132156 bytes/sec)
: 7m32.69s real 0m0.51s user 0m3.88s system
Over 8Mbits/sec, keep this number in mind.
: dmesg:
:
: OpenBSD 3.8-current (GENERIC) #0: Wed Sep 14 22:05:15 MDT 2005
: [EMAIL PROTECTED]:/usr/src/sys/arch/i386/compile/GENERIC
...
: uhci0 at pci0 dev 29 function 0 "Intel 82801CA/CAM USB" rev 0x02: irq
: 10 usb0 at uhci0: USB revision 1.0
: uhub0 at usb0
: uhub0: Intel UHCI root hub, rev 1.00/1.00, addr 1
: uhub0: 2 ports with 2 removable, self powered
...
: umass0 at uhub0 port 2 configuration 1 interface 0
: umass0: Prolific Technology Inc. Mass Storage Device, rev 2.00/1.00,
: umass0: addr 2 using SCSI over Bulk-Only
: scsibus3 at umass0: 2 targets
: sd2 at scsibus3 targ 1 lun 0: <WDC WD20, 00JB-00GVA0, 08.0> SCSI0 0/
: direct fixed
: sd2: 190782MB, 190782 cyl, 64 head, 32 sec, 512 bytes/sec, 390721969
: sec total
uhci is USB1, which theoretically tops out at 11Mbits/sec. You won't
get much faster access unless you get USB2, which tops out at
480Mbits/sec.
--
It is not enough to succeed. Others must fail.
-- Gore Vidal
