>>>>> "Alan" == Alan Stern <[EMAIL PROTECTED]> writes:
Alan> There may be electrical or electromagnetic interference problems
Alan> between the two ports on your computer's USB controller. When
Alan> both ports are in heavy use this could affect the total
Alan> throughput. If you only do I/O to one of the sticks at a time,
Alan> does everything work okay?
No. The transmission has timeouts too, however much less frequent. It took
me 5 "dd" runs on the 2 GByte stick to get to that point. The next three
runs all had problems with the last run unhampered.
But I tried the same sticks and similar combinbation of read processes on
the sticks on a thinkpad and observed zero dropouts.With 3 sticks, I got the
disk hroughput up to about 28 MByte and was even seeing DVB-T via a USB
Cinergy T2.
So either the EPOX board has problems, or the VIA Chipset, or our ehci_hcd
implementation.
...
Alan> /* * Time out in seconds for disks and Magneto-opticals (which are
Alan> slower). */ #define SD_TIMEOUT (30 * HZ) #define SD_MOD_TIMEOUT
Alan> (75 * HZ)
Does this long timeout make sense on a USB stick. No disks to spin up, no
heads to move.
Bye
--
Uwe Bonnes [EMAIL PROTECTED]
Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt
--------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------
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