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тАО05-12-2005 11:18 AM
тАО05-12-2005 11:18 AM
SAN failover in RHEL4 with QLogic cards
Hi!
I was testing Clariion CX600 devices today, and in the default configuration I could see my 2 disks as 4 due to the redundant paths, and accessing them via 1 path worked fine, so with single-path everything seems fine.
After testing that, I then enabled the failover feature in the QLogic driver (using the "set_parm -x" script that comes with the HP driver), however after rebooting I now see no disks but just the 2 HBAs (QLogic 2340) and get a truckload of I/O errors in the syslog.
Any hints regarding this ?
I'd like to see /etc/modprobe.conf from someone having a setup that works, as I think my modprobe.conf could be the cause of the problems.
I was testing Clariion CX600 devices today, and in the default configuration I could see my 2 disks as 4 due to the redundant paths, and accessing them via 1 path worked fine, so with single-path everything seems fine.
After testing that, I then enabled the failover feature in the QLogic driver (using the "set_parm -x" script that comes with the HP driver), however after rebooting I now see no disks but just the 2 HBAs (QLogic 2340) and get a truckload of I/O errors in the syslog.
Any hints regarding this ?
I'd like to see /etc/modprobe.conf from someone having a setup that works, as I think my modprobe.conf could be the cause of the problems.
3 REPLIES 3
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тАО05-13-2005 05:07 AM
тАО05-13-2005 05:07 AM
Re: SAN failover in RHEL4 with QLogic cards
Jesper,
I went to check on EMCs web site, but I seem to be having problems with my account; did you verify that this card is certified to work with the CX600 (and switches/directors you are using)?
Also, there may be some config changes you need to make to get it to work with the failover settings you are assigning.
David
I went to check on EMCs web site, but I seem to be having problems with my account; did you verify that this card is certified to work with the CX600 (and switches/directors you are using)?
Also, there may be some config changes you need to make to get it to work with the failover settings you are assigning.
David
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тАО05-13-2005 07:26 AM
тАО05-13-2005 07:26 AM
Re: SAN failover in RHEL4 with QLogic cards
Attached is a document from HP concerning the QLogic and Linux and various arrays. Note not all arrays are supported.
I haven't read in-depth, hope it is useful.
I haven't read in-depth, hope it is useful.
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тАО05-14-2005 02:34 AM
тАО05-14-2005 02:34 AM
Re: SAN failover in RHEL4 with QLogic cards
Hi!
Thanks for the doc. It just confirms what I suspected....that the HP version of the QLogic driver is made to support multipath failover only with HP storage, so no-go for EMC storage.
The EMC supported drivers leaves much to wish for, so they're not much better.
I'll just give it a last go with the QLogic stock drivers.
Thanks for the doc. It just confirms what I suspected....that the HP version of the QLogic driver is made to support multipath failover only with HP storage, so no-go for EMC storage.
The EMC supported drivers leaves much to wish for, so they're not much better.
I'll just give it a last go with the QLogic stock drivers.
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