Hi Folks, Please excuse in advance if you've covered this already. I'm setting up some fibre channel storage for MythTV, and want to achieve either 'active/active' or active/passive' between the drives and the host.
Since FC-AL drives are dual-ported, they present themselves twice on the Fabric (using a Brocade 2800 switch). With (2) hbas, I see 4 devices per target. It's my understanding that between udev (persistent naming) and device-mapper (along with multipath tools) I should be able to transparently have a path go away and continue working (much like Veritas' DMP offering, or EMC's PowerPath. I've got 2.6.12-rc2 installed, and multipath seems to fire up. Anyone have any experience with what device names to actually use (or do I need to create naming rules in UDEV first?) when wanting to have failover happen in the background ? As a side note, I have tried the 'mdadm' method of creating a multipath device, and then using a set of those devices to create a raidset. Strictly passive active though, although I suppose I could reference the other half of the devices with the alternate path first. For reference, I'm using 8.0.27 of the 2.6 driver (no patches applied, not required I believe). Thanks in advance, Greg. -- TriLUG mailing list : http://www.trilug.org/mailman/listinfo/trilug TriLUG Organizational FAQ : http://trilug.org/faq/ TriLUG Member Services FAQ : http://members.trilug.org/services_faq/ TriLUG PGP Keyring : http://trilug.org/~chrish/trilug.asc
