Re: Why USB harddrive is so slow under FreeBSD?

2009-04-13 Thread Erik Trulsson
On Mon, Apr 13, 2009 at 12:27:27AM -0600, Tim Judd wrote: > On Sun, Apr 12, 2009 at 1:54 PM, Yuri wrote: > > > I have FreeBSD-71 running with USB controller: > > uhci0: port 0xa800-0xa81f irq 21 at device 16.0 > > on pci0 > > > > I connected to it Toshiba USB hard drive HDDR500E03X: > > umass0:

Re: Why USB harddrive is so slow under FreeBSD?

2009-04-13 Thread Tim Judd
On Sun, Apr 12, 2009 at 1:54 PM, Yuri wrote: > I have FreeBSD-71 running with USB controller: > uhci0: port 0xa800-0xa81f irq 21 at device 16.0 > on pci0 > > I connected to it Toshiba USB hard drive HDDR500E03X: > umass0: on > uhub4 > da0: Fixed Direct Access SCSI-4 device > > When I try to co

Re: Why USB harddrive is so slow under FreeBSD?

2009-04-12 Thread Erik Trulsson
On Sun, Apr 12, 2009 at 02:53:42PM -0700, Yuri wrote: > Dan Nelson wrote: > > > > Increase your blocksize. dd's default is 512 bytes. Try bs=64k > > > > This works, I am getting 25-27 MB/s. Still lower than this device > supports (~50MB/s). > I guess because this VIA controller is very old.

Re: Why USB harddrive is so slow under FreeBSD?

2009-04-12 Thread Yuri
Dan Nelson wrote: Increase your blocksize. dd's default is 512 bytes. Try bs=64k This works, I am getting 25-27 MB/s. Still lower than this device supports (~50MB/s). I guess because this VIA controller is very old. Yuri ___ freebsd-question

Re: Why USB harddrive is so slow under FreeBSD?

2009-04-12 Thread Dan Nelson
In the last episode (Apr 12), Yuri said: > I have FreeBSD-71 running with USB controller: > uhci0: port 0xa800-0xa81f irq 21 at device 16.0 > on pci0 > > I connected to it Toshiba USB hard drive HDDR500E03X: > umass0: on uhub4 > da0: Fixed Direct Access SCSI-4 device > > When I try to copy da

Re: Why USB harddrive is so slow under FreeBSD?

2009-04-12 Thread Yuri
Frederique Rijsdijk wrote: I get around the same speeds if I do it that way. But if I add 'bs=1m', speeds go up to 27MB/sec. Do you also have VIA 83C572? I was leaning towards a direction that VIA 83C572 is probably USB-1.X only and only has speeds up to 12 Mb/s. But I can't find documentatio

Re: Why USB harddrive is so slow under FreeBSD?

2009-04-12 Thread Frederique Rijsdijk
Yuri wrote: I have FreeBSD-71 running with USB controller: uhci0: port 0xa800-0xa81f irq 21 at device 16.0 on pci0 I connected to it Toshiba USB hard drive HDDR500E03X: umass0: on uhub4 da0: Fixed Direct Access SCSI-4 device When I try to copy data with 'dd if=/dev/da0s1 of=/dev/null cou

Why USB harddrive is so slow under FreeBSD?

2009-04-12 Thread Yuri
I have FreeBSD-71 running with USB controller: uhci0: port 0xa800-0xa81f irq 21 at device 16.0 on pci0 I connected to it Toshiba USB hard drive HDDR500E03X: umass0: on uhub4 da0: Fixed Direct Access SCSI-4 device When I try to copy data with 'dd if=/dev/da0s1 of=/dev/null count=1' it