Hello, I had the need to transfer a 150Gb file and the network between buildings was way too slow (est. 96 hours), so I looked at an external USB disk to connect to my laptop. I could not find too much on the lists but decided to try a Maxtor 200Gb firewire/USB external disk. I compiled in ehci device (experimental yes), plugged device in and it recognized it ok. FreeBSD k9 5.2-CURRENT FreeBSD 5.2-CURRENT #1: Thu Dec 18 22:47:13 EST 2003 Dec 19 08:34:27 k9 kernel: umass0: Maxtor OneTouch, rev 2.00/2.00, addr 2 Dec 19 08:34:27 k9 kernel: umass0: Get Max Lun not supported (STALLED) Dec 19 08:34:27 k9 kernel: GEOM: create disk da0 dp=0xc2da6450 Dec 19 08:34:27 k9 kernel: da0 at umass-sim0 bus 0 target 0 lun 0 Dec 19 08:34:27 k9 kernel: da0: <Maxtor OneTouch 0200> Fixed Direct Access SCSI-0 device Dec 19 08:34:27 k9 kernel: da0: 1.000MB/s transfers Dec 19 08:34:27 k9 kernel: da0: 194480MB (398295040 512 byte sectors: 255H 63S/T 24792C) Trying to mount it and got: Dec 19 08:35:36 k9 kernel: mountmsdosfs(): disk too big, sorry Someone else previously reported this on the list. So turned it into a UFS disk, mounted it and it worked perfectly. I was a little worried given the 1MB/s message but it transferred the file from Sun server via ftp to my laptop Compaq N610c (usb2 but no firewire) and had transfer rate hitting either wire maximum (100Mb/s full duplex) or CPU limits (Sun server was busy). Later tests with bonnie showed: Version 1.93c ------Sequential Output------ --Sequential Input- --Random- Concurrency 1 -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP k9 1G 90 94 7866 4 4449 2 183 96 10597 4 66.6 3 Latency 255ms 166ms 905ms 58076us 55577us 38370ms Version 1.93c ------Sequential Create------ --------Random Create-------- k9 -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete-- files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP 16 5985 37 +++++ +++ 30524 90 2443 15 25004 67 30076 94 Latency 651ms 13733us 32923us 2696ms 193ms 12609us (manual states for first 10x power ons, disk verifies writes so they are slower than reads, so expect it should be a little faster in future). Kudos and thanks to the USB (and CAM) guys! Very impressive and very useful! cheers -- tonymReceived on Fri Dec 19 2003 - 01:14:08 UTC
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