On Thu, May 04, 2006 at 05:08:41PM +0300, Erez Zilber wrote: > Hi, > > I'm new to device mapper and trying to set a multipath target: > > I'm connected to the same LUN over iSCSI in 2 paths: > > Here's the output of sg_map: > sg_map -i -x > /dev/sg0 3 0 0 0 0 /dev/sda DotHill SANnet II FC 411I > /dev/sg1 4 0 0 0 0 /dev/sdb DotHill SANnet II FC 411I > > I ran the following command: > multipath 2 round-robin 1 0 /dev/sda round-robin 1 0 /dev/sdb > Just start multipathd or run multipath without params > If I understand correctly, the 1st priority group contains /dev/sda. The > 2nd priority group contains /dev/sdb. If /dev/sda fails, traffic should > automatically move to /dev/sdb. Is that right? > > Here's the out put of multipath -l: > > 3600c0ff00000000007c1d121c397f503 > [size=10 GB][features=0][hwhandler=0] > \_ round-robin 0 [prio=0][active] > \_ 3:0:0:0 sda 8:0 [active][undef] > \_ round-robin 0 [prio=0][enabled] > \_ 4:0:0:0 sdb 8:16 [active][undef] > > What does 8:0 & 8:16 mean? What is 3600c0ff00000000007c1d121c397f503? > 8:0 & 8:16 are paths major:minor numbers 3600c0ff00000000007c1d121c397f503 is the multipath name. consider activating the fancy naming option in the config file. > Now, assuming that what I did so far is ok, how do I use the multipath > device? Do I use /dev/sda (or /dev/sdb)? > You should use /dev/mapper/3600c0ff00000000007c1d121c397f503 Regards, cvaroqui -- dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
