Hello.
Thanks Mathias. I had difficulties with kernel 4 crashes due to a null
pointer, had to revert a rtlwifi patch.
Runing Kernel 4.1.0-rc7 and after some more testing i just changed 1
usb-sata-bridge and the resets are gone now. That is really nice. Thank
you for making me that.
Axel
Am 2015-06-11 10:09, schrieb Mathias Nyman:
Hi
On 11.06.2015 07:46, Axel Christiansen wrote:
Hello List.
I am having trouble solving a problem with a bunch of USB3-SATA-bridge
connected to 2 USB3-hubs. I was not able finding any useful help for
weeks now.
Perhaps by bringing this issue to linux-usb can help me troubleshot
the problem or sort out a bug or help improve Linux USB stability.
The issue is an ongoing reset of different JMicron (ID 152d:0567)
JMS567 USB3-SATA-bridges partitioned equally to 2 USB3-hubs (ID
2109:0812).
I have 8 of theses bridges with 8 3TB WD (WDC WD30EZRX) hard drives
connected to them. That 8 drives are configured running as a raid6.
Reading/writing using 1 hard disk at a time works fine, even with
higher speeds using dd or copying large files. Using several drives
simultaneously is causing ongoing resets on a number of these bridges
randomly (but 1 a time). It is like reading for seconds, then the read
blocks for may by 5 seconds, a reset on one bridge happens and the
reading continues.
The host is a Debian 8 with Linux 3.16.0-4-amd64.
What i noticed today was, by lowering max_sectors to 16 or 8 improves
stability much, but it is still fare from stable.
What could be done improving this?
Are there any quirks worth trying?
Any idea would be much appreciated. Axel
At least xhci has several improvements since 3.16,
Can you try to reproduce this with a more recent kernel?
4.1-rc7 preferably, or 4.1 final once it's out.
-Mathias
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