* Sebastian Herbszt
> The comment and code from libmultipath/prioritizers/emc.c
>
> if ( /* Effective initiator type */
> sense_buffer[27] != 0x03
> /*
> * Failover mode should be set to 1 (PNR failover mode)
> * or 4 (ALUA failover mode).
> */
> || (((sense_buffer[28] & 0x07) != 0x04) &&
> ((sense_buffer[28] & 0x07) != 0x06))
> /* Arraycommpath should be set to 1 */
> || (sense_buffer[30] & 0x04) != 0x04) {
> pp_emc_log(0, "path not correctly configured for failover");
> }
>
> doesn't help with the detection part?
Not really, there's no way I can put this into a device{} section to
differentiate between two CLARiiONs running different failover modes.
What I need to do is this:
# My new CX3-40f which supports ALUA (preferred) as well as PNR
device {
vendor DGC
product *
product_blacklist LUNZ
alua_capable yes
[..ALUA optimised settings...]
}
# My old CX200, only supports PNR
device {
vendor DGC
product *
product_blacklist LUNZ
alua_capable no
[..PNR optimised settings...]
}
...but there's no such thing as the "alua_capable" setting or any other
setting that can be used to distinguish between the two CLARiiONs, as
far as I know, so I have to use both arrays in PNR mode even though the
newest one of them supports ALUA.
Please prove me wrong... ;-)
Regards,
--
Tore Anderson
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