Hello, coping big files to a usb 1.1 external harddrive brings the machine to stop responding. Since the machine does work as before for some time after the copy process was started I guess that memory gets filled with dirty pages and at some time the kernel decides to wait until some have been written to disk.
What I don't understand is, why the whole machine stops responding and
not just the cp process.
Here is a top sniplet (in this case rsync was used to copy data):
15 0 1264 1264 920 R 0.4 0.0 0:00 0 top
15 0 0 0 0 DW 0.0 0.0 0:02 0 bdflush
15 0 0 0 0 DW 0.0 0.0 0:03 0 kupdated
16 0 0 0 0 DW 0.0 0.0 0:22 0 usb-storage-0
15 0 0 0 0 DW 0.0 0.0 0:01 0 kjournald
15 0 556 556 384 D 0.0 0.0 0:12 0 rsync
15 0 1704 1704 1292 R 0.0 0.0 0:00 0 sshd
I have reproduced this effect on diffrent Hardware: IBM Thinkpad, some
Siemens/Fujitsu Box, Dell Poweredge 650. With these Kernels: 2.4.22-jari
(thinkpad) and two times RH AS 3.0 2.4.21-4.0.1.EL (siemens and dell).
Mounting the usb drive -o sync helps to keep the machine responsive, but
decreases the not-too-fast-usb-11 performance even more.
regards
Stefan
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Stefan V�lkel [EMAIL PROTECTED]
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