In my test machine I can see the filesystem list using bdf commands.$bdf  Filesystem          kbytes    used   avail %used Mounted on  /dev/vg00/lvol3    58916864 6242747 49386840   11% /  /dev/vg00/lvol1    2003481   47996 1755136    3% /stand  /dev/vg77/stds     5120000   18753 4782427    0% /var/opt/stdenv  /dev/vg77/scrap    3584000   18684 3342490    1% /tms/vts  /dev/vg77/cmdsscrap               3584000  530986 2862264   16% /mnt  I have a scenario where I have to test the sar(1m) command to check the disk activity.for that I need a filesystem which is mirrored and configured with more then one disk.But unfortunately the above existing filesystems are having only one disk mirrored with it.# lvdisplay -v /dev/vg00/lvol1--- Logical volumes ---LV Name                     /dev/vg00/lvol1VG Name                     /dev/vg00LV Permission               read/write                LV Status                   available/syncd           Mirror copies               0            Consistency Recovery        MWC                 Schedule                    parallel      LV Size (Mbytes)            2000            Current LE                  125       Allocated PE                125         Stripes                     0       Stripe Size (Kbytes)        0                   Bad block                   off          Allocation                  strict/contiguous         IO Timeout (Seconds)        default             --- Distribution of logical volume ---PV Name                 LE on PV  PE on PV  /dev/disk/disk4         125       125  <-- Only one disk is mirrored.Can anyone please let me know, How to add another disk into these existing filesystem?Please help me with the steps for mirroring the disk with filesystem.
How to Mirror one more disk on existing filesystem
lvm;mirror;hp ux