Re: umass performance [SOLVED]
Wojciech Puchar ha scritto: bs=64k (or more) Thanks, this was a terrific improvement! bye av. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: umass performance
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) By using this command line not only are you getting slow results, you are also probably significantly reducing the lifetime of you flash memory drive (depending on its technology). What you said in the above command line is that the copy is to be done one 512-byte block at a time - i.e. read 512 bytes, write 512 bytes, repeat. As common flash memories have large flash blocks (32 kB - 128 kB), you're actually rewriting the whole "large" flash block by writing small blocks of data. For example, to fill a 32 kB block by writing 512 bytes at a time, the whole block will be rewritten 64 times. Use a "bs=1m" argument next time. signature.asc Description: OpenPGP digital signature
Re: umass performance
On 3/17/09, 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...@.xxx.xx:/usr/obj/usr/src/sys/ amd64 > h24# > > > # usbdevs -v > Controller /dev/usb0: > addr 1: full speed, self powered, config 1, UHCI root hub(0x), > Intel(0x), rev 1.00 > port 1 powered > port 2 powered > Controller /dev/usb1: > addr 1: full speed, self powered, config 1, UHCI root hub(0x), > Intel(0x), rev 1.00 > port 1 powered > port 2 powered > Controller /dev/usb2: > addr 1: full speed, self powered, config 1, UHCI root hub(0x), > Intel(0x), 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(0x), > Intel(0x), rev 1.00 > port 1 powered > port 2 powered > Controller /dev/usb4: > addr 1: high speed, self powered, config 1, EHCI root hub(0x), > Intel(0x), 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(0x), > (0x103c)(0x), 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 I had a similiar problem with a 4 GB USB device, in both Linux and FreeBSD 7. It turned out to be a non standard device, so the system was "restarting" the device every now and then. I don't know if this is your problem, but taking a look at the system log while copying might be worthy. > > > Any hint appreciated. > > bye & Thanks >av. > ___ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to > "freebsd-questions-unsubscr...@freebsd.org" > ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: umass performance
> 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? Maybe it has something to do with the block size? Olivier ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: umass performance
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...@.xxx.xx:/usr/obj/usr/src/sys/ amd64 h24# # usbdevs -v Controller /dev/usb0: addr 1: full speed, self powered, config 1, UHCI root hub(0x), Intel(0x), rev 1.00 port 1 powered port 2 powered Controller /dev/usb1: addr 1: full speed, self powered, config 1, UHCI root hub(0x), Intel(0x), rev 1.00 port 1 powered port 2 powered Controller /dev/usb2: addr 1: full speed, self powered, config 1, UHCI root hub(0x), Intel(0x), 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(0x), Intel(0x), rev 1.00 port 1 powered port 2 powered Controller /dev/usb4: addr 1: high speed, self powered, config 1, EHCI root hub(0x), Intel(0x), 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(0x), (0x103c)(0x), 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. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org" ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
umass performance
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...@.xxx.xx:/usr/obj/usr/src/sys/ amd64 h24# # usbdevs -v Controller /dev/usb0: addr 1: full speed, self powered, config 1, UHCI root hub(0x), Intel(0x), rev 1.00 port 1 powered port 2 powered Controller /dev/usb1: addr 1: full speed, self powered, config 1, UHCI root hub(0x), Intel(0x), rev 1.00 port 1 powered port 2 powered Controller /dev/usb2: addr 1: full speed, self powered, config 1, UHCI root hub(0x), Intel(0x), 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(0x), Intel(0x), rev 1.00 port 1 powered port 2 powered Controller /dev/usb4: addr 1: high speed, self powered, config 1, EHCI root hub(0x), Intel(0x), 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(0x), (0x103c)(0x), 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. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
