Hi Tore. You should be able to use the emc_handler for both arrays. Depending on the distro you are using only implicit ALUA is supported, explicit ALUA is in being worked on for upcoming distros. Whether the storage group within the array attached to the server is ALUA or not is determined by the failover mode you set for the host on that array. At the server side you will not know the difference between the two failover modes, PNR or ALUA. Regards, Wayne. EMC Corp -----Original Message----- From: dm-devel-bounces@xxxxxxxxxx [mailto:dm-devel-bounces@xxxxxxxxxx] On Behalf Of Tore Anderson Sent: Friday, March 28, 2008 7:24 AM To: dm-devel@xxxxxxxxxx Subject: Using different configuration for arrays with identicalvendor/product Hey. I've got an EMC CX200 and a CX3-40 in my SAN. The latter one supports ALUA, which I'm using as much as I can, the former does not. The hosts need to be able to access volumes on both the arrays at the same time. Unfortunately the volumes on both of these boxes have vendor <DGC> and product <RAID 5>, so making two different device sections for them with different hardware_handler and path_checker settings isn't trivial. I figured I could simply override the two settings in the multipath{} blocks for volumes on the CX200, making the device{} block specific for the CX3-40. Doesn't appear to work, though, the path_checker- and hardware_handler-settings in the multipath{} blocks appears to be silently ignored. Am I out of luck or is there any other way to do what I want? For reference, this is the device section I use for the CX200 in standard <trespassing> mode: device { vendor DGC.* product RAID.* hardware_handler "1 emc" path_checker emc_clariion prio_callout "/sbin/mpath_prio_emc /dev/%n" features "1 queue_if_no_path" path_grouping_policy group_by_prio failback immediate } And for the CX3-40 in ALUA mode: device { vendor DGC.* product RAID.* hardware_handler "0" path_checker tur prio_callout "/sbin/mpath_prio_emc /dev/%n" features "1 queue_if_no_path" path_grouping_policy group_by_prio failback immediate } These both work fine on hosts that only connect to one of the arrays at a time. Regards -- Tore Anderson -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
