Disk Error

Hello,

Regarding your first disk c0t0d0s2 , it shows a failing flag which indicates that there was an IO error while writing to public region of the disk...
For this, check /var/adm/messages for scsi errors (or transport errors), also you can check iostat

# iostat -En | grep -i hard   

If the disk shows good no. of hard errors, likely that disk is having issues & needs replacement, best would be to monitor hard/transport errors, if they are growing then disk has issues..  If the errors are not increasing, you can clear the failing flag by following command:

# vxedit -g <diskgroup> set failing=off <diskname>

Regarding your other disks which are on c9 controller, there could be multiple possibilities...

a) Check from storage if disks are presented correctly
b) Check whether disks have proper label on it  (prtvtoc /dev/rdsk/c9txdxsx), if it shows no label, then you need to label them (If there was existing data on the disk, there is a risk of data gone), once labelled, run "vxdctl enable" to rescan the disks.
c) Check multipaths of each disk, if all the paths to a disk are unavailable then disk will land in error state, you can check the same with

# vxdisk list c9txdxsx      (check at bottom for multipathing information, atleast one path should be enabled)
OR
# vxdisk path

d) Check if c9 controller is configured (cfgadm -al)  if not then configure it...
e) check if controller is enabled from DMP
# vxdmpadm listctlr all

if it is disabled then you can enable with

# vxdmpadm enable ctlr=c9

Hope this helps

Gaurav