thank you for your help. It turns out that that was the cause of the freeze.
With only one drive plugged in, it has been working like a charm under 2.4.18.
I have downloaded 2.5.60 and compiled it. When I have a chance, I will try it.
Cheers
Alberto
Ogden, Aaron A. wrote:
Hello Alberto,
I had similar problems with USB2 hanging during file transfers. We have
seismic data here with very large files (>10GB) which take a long time to
transfer to disk. I found that when I accessed two or more USB2 devices on
the same controller the system would hang. I think this error is caused by
bus contention between the two devices. My workaround for this problem was
to install two USB2 controller cards (PCI in my case) and plug one USB2
drive into each USB2 controller. When the drives are on separate
controllers I can copy data to and from both drives simultaneously with no
problems. This solution is somewhat wasteful but it does work... hopefully
the problem will be resolved in some future kernel. I am currently running
2.4.20 on that system, 2.4.18 does not work very well and the -ac series did
not work at all for me.
I hope this helps,
A
-----Original Message-----
Message: 6
Date: Tue, 11 Feb 2003 09:19:20 -0500
From: ALBERTO D SCOTTI <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: [Linux-usb-users] System hangs up with USB 2.0 and mass storage
I have been trying to add an external hard drive using USB 2.0
The box is a dual Athlon, with a Tyan mb (thunder). It runs RH 8.0
(2.4.18-14smp), but I had the same problem after upgrading to 2.4.20.
I have tried all possible permutation of 2 controllers (vt6202 and NEC) and
2 kind of HD (Maxtor and generic based on a ACER IDE to USB chipset).
The problem is the following: ehci-hcd recognizes the controller without a glitch.
When I plug in the HD, usb-storage correctly identifies it and attach it to the
appropriate scsi emulation device. I was able to create the partitions and format
the disk (either ext3 of reiserfs). So far so good. Trouble starts when I start moving
files to and from the disk. It works for some time (a few minutes, equivalent to 1 or 2 Gb).
Then, first the disk stop working, say during a transfer. After approximatively 30 seconds, the
whole system freezes and I need to to do a hard reboot. With the 2.4.20 modules compiled with
the debug option on, the last two lines that I read out of dmesg are
usb-controller: Bulk data transfer result 0x0
usb-controller: attempting to get CSW
Things that I have tried and did not work
1) Boot in single CPU mode
2) Boot with the noapic command appended
3) Set the smp_affinity so that only one cpu services the interrupt requests of ehci-hcd
4) Set the MP version to 1.1 in the bios.
This is a production system, so I am reluctant in doing any extensive testing without some guidance.
Any help is appreciated.
-- Alberto Scotti Asst. Prof. Dept. of Marine Sciences CB 3300 University of North Carolina Chapel Hill, NC 27599-3300 919-962-9454 (w) 919-962-1254 (f)
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