.. connected by SAS LSI RDAC controller.
SAN BIOS can set in several modes. If you use LSI RDAC drivers (for RHEL) then must use LNXCLVMWARE mode, but, in Proxmox, if you use multipath is ABSOLUTELY important set ADT (AVT) support as *ON*.
If in SAN BIOS ADT is OFF (the default) multipath works badly, continuously reverses the status of the devices fron enable to ghost and redundancy does not work.
This problem is present *only* LSI RDAC SAS controller, now I prefer to use IBM Storwize connected by FC to Emulex card and works like a charm
Luca
SAN BIOS can set in several modes. If you use LSI RDAC drivers (for RHEL) then must use LNXCLVMWARE mode, but, in Proxmox, if you use multipath is ABSOLUTELY important set ADT (AVT) support as *ON*.
If in SAN BIOS ADT is OFF (the default) multipath works badly, continuously reverses the status of the devices fron enable to ghost and redundancy does not work.
This problem is present *only* LSI RDAC SAS controller, now I prefer to use IBM Storwize connected by FC to Emulex card and works like a charm
Luca