bs=64k (or more)
On Tue, 17 Mar 2009, Andrea Venturoli wrote:
Hello.
I'm using dd to clone an 8GB USB memory into an identical one.
# dd if=/dev/da2 of=/dev/da1
load: 0.01 cmd: dd 12026 [physwr] 0.00u 0.01s 0% 904k
396+0 records in
395+0 records out
202240 bytes transferred in 1.453741 secs (139117 bytes/sec)
15925248+0 records in
15925248+0 records out
8153726976 bytes transferred in 31722.194052 secs (257035 bytes/sec)
As you can see the process is VERY slow, taking nearly 9 hours.
Anything to try?
Some info:
# uname -a
FreeBSD xxx.xxx.xx 7.1-RELEASE-p2 FreeBSD 7.1-RELEASE-p2 #0: Fri Jan 23
13:02:07 CET 2009 r...@xxxx.xxx.xx:/usr/obj/usr/src/sys/XXXXXXXX amd64
h24#
# usbdevs -v
Controller /dev/usb0:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000),
Intel(0x0000), rev 1.00
port 1 powered
port 2 powered
Controller /dev/usb1:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000),
Intel(0x0000), rev 1.00
port 1 powered
port 2 powered
Controller /dev/usb2:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000),
Intel(0x0000), rev 1.00
port 1 addr 2: full speed, power 90 mA, config 1, USB <-> Serial(0x6001),
FTDI(0x0403), rev 4.00
port 2 powered
Controller /dev/usb3:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000),
Intel(0x0000), rev 1.00
port 1 powered
port 2 powered
Controller /dev/usb4:
addr 1: high speed, self powered, config 1, EHCI root hub(0x0000),
Intel(0x0000), rev 1.00
port 1 powered
port 2 powered
port 3 powered
port 4 powered
port 5 powered
port 6 powered
port 7 addr 2: high speed, power 100 mA, config 1, DISK 2.0(0x1000),
USB(0x090c), rev 4.03
port 8 addr 3: high speed, power 100 mA, config 1, DISK 2.0(0x1000),
USB(0x090c), rev 4.03
Controller /dev/usb5:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000),
(0x103c)(0x0000), rev 1.00
port 1 addr 2: full speed, self powered, config 1, Virtual Keyboard(0x1027),
HP(0x03f0), rev 0.02
port 2 addr 3: full speed, self powered, config 1, Virtual Hub(0x1327),
HP(0x03f0), rev 0.01
port 1 powered
port 2 powered
port 3 powered
port 4 powered
port 5 powered
port 6 powered
port 7 powered
Any hint appreciated.
bye & Thanks
av.
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