1. remove the bad mirror copy : unmirrorvg -c 1 rootvg hdisk0
2. recreate bosboot for each disk containing hd5 lv : bosboot -ad hdisk1
3. identify the sysdump device : sysdumpdev -l
4. if the lv was on the bad disk, change it : sysdumpdev -Pp /dev/hd6
5. remove the logical volume : rmlv hd7
6. remove the bad disk from the rootvg : reducevg rootvg hdisk0

1. add the new disk to the rootvg : extendvg -f rootvg hdisk0
2. mirror the rootvg : mirrorvg -S -c 2 rootvg
3. recreate bosboot for each disk containing hd5 lv : bosboot -ad hdisk0 ; bosboot -ad hdisk1
4. check the bootlist : bootlist -m normal -o
5. Add each bootable disk in the bootlist : bootlist -m normal hdisk0 hdisk1

1. identify the sysdump device : sysdumpdev -l
2. estimate the sysdump size needed (in bytes) : sysdempdev -e
3. create a logical volume : mklv -y hd7 -t sysdump rootvg 10 hdisk0
4. change the destination of the sysdump : sysdumpdev -Pp /dev/hd7

To parallelize the mirror copy you can specify how many simultaneous LPs to sync. This will speed up your mirror.

If you set the parameter NUM_PARALLEL_LPS=24 for example in /etc/environment then logout and login again, do a: syncvg -v rootvg &

# mklv -y hd5 -t boot rootvg 1 hdisk0
# bosboot -ad /dev/hdisk0 -l hd5
# bootlist -m normal -o