On 06/10/2011 03:46 PM, Christophe BOULLANGER wrote: > Hi, > i wanna know what is that difference of both stout of multipath -ll > <Anti-T> multipath -ll > <Anti-T> mpath2 (350010b900004b868) dm-3 IBM-ESXS,GNA073C3ESTT0Z > <Anti-T> [size=68G][features=0][hwhandler=0] > <Anti-T> \_ round-robin 0 [prio=1][active] > <Anti-T> \_ 1:0:1:0 sdc 8:32 [active][ready] > <Anti-T> \_ round-robin 0 [prio=1][enabled] > <Anti-T> \_ 1:0:3:0 sde 8:64 [active][ready] > <Anti-T> c quoi la diff entre ca > <Anti-T> et ca > <Anti-T> orasm (36005076b0755627f4dee6fd70000002d) dm-6 IBM,1820N00 > <Anti-T> size=250G features='1 queue_if_no_path' hwhandler='0' wp=rw > <Anti-T> `-+- policy='round-robin 0' prio=1 status=active > <Anti-T> |- 0:0:3:0 sdb 8:16 active ready running > <Anti-T> `- 0:0:2:0 sda 8:0 active ready running > One have 2 tree and one both disk is on the same branch > One is more secure ? > Thank you for your help. > Have a nice day. The first one has two path groups each with one path and is configured for failover (no load balancing of I/O). The second has one path group with both paths in it and I/O will be balanced (round-robin) between them. This is covered in the man page and other documentation - see the "failover" and "multibus" path grouping policies. Regards, Bryn. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
