On May 14, 2013, at 2:36 AM, Striver/sj wrote: > Hi guys > I create a mirror device on CentOS5.8, the table is > "0 8372224 mirror core 3 4096 nosync block_on_error 2 8:16 8192 8:32 8192" > But I found when I offline the first leg of the mirror device. All write IO is hung up. > But it will not occur on CentOS5.3/5.4, in my opinion, if one leg returns IO error, > IO will continue if there is still other good leg. > So does this should be deal with by user space (dmeventd)? Or I make something error. > Yes, it should be handled by dmeventd. (dmeventd will notice the event raised by the kernel and attempt a 'lvconvert --repair vg/lv' or 'vgreduce --removemissing vg if old enough.) You should find that a 2-way mirror is converted to a linear device when one of the legs fails. brassow -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
