Messages in this thread | | | Date | Wed, 13 Nov 2002 10:51:14 +0800 | From | Michael Clark <> | Subject | Re: md on shared storage |
| |
On 11/13/02 08:25, Brian Jackson wrote: > Here's a question for all those out there that are smarter than me(so I > guess that's most of you then :) I looked around (google, kernel source, > etc.) trying to find the answer, but came up with nothing. > Does the MD driver work with shared storage? I would also be interested > to know if the new DM driver works with shared storage(though I must > admit I didn't really try to answer this one myself, just hoping > somebody will know).
They should work, obviously with some caveats. Having 2 hosts both trying to reconstruct the same md RAID1 may cause some troubles.
> I ask because I seem to be having some strange problems with an md > device on shared storage(Qlogic FC controllers). The qlogic drivers spit > out messages for about 20-60 lines then the machines lock up. So the > drivers were my first suspicion, but they were working okay before. So I > went back and got rid of the md device and now everything is working > again. Anybody got any ideas?
Could be a stack related problem with the qlogic driver. The additional stack pressure of the md layer perhaps ?? The 20-60 lines of logs in would probably give some ideas.
I have a couple of shared storage clusters that were using qla2300 driver, ext3 and LVM1 and they would periodically ooops. Removed LVM and the systems are now rock solid.
~mc
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |