View source for Replacing a failed disk in a software mirror

So here's the scenario, you have a server with disk mirrored with Solaris Disksuite, c0t0d0 and c0t1d0.  The disk c0t1d0 has failed and you want to replace it without shutting down the box.  We have the following metadevices and sub-mirrors:

d0:  d1  and  d2
d10: d11 and  d12
d20: d21 and  d22
d30: d31 and  d32
d40: d41 and  d42
d50: d51 and  d52

This procedure had been tested and works on a Sunfire V120.  You may have to alter this slightly depending on the hardware you are running.  Consult the User Guide for you server on how best to replace a drive on a running system.

1. Delete the meta databases stored on the failed disk, stored in this case on slice 7 of the disk

  metadb -d c0t1d0s7

2. Detach the sub-mirrors, from the failed disk, from the meta devices

  metadetach -f d0 d2
  metadetach -f d10 d12
  metadetach -f d20 d22
  metadetach -f d30 d32
  metadetach -f d40 d42
  metadetach -f d50 d52

The -f option is necessary as you will need to force this to happen as the disk has failed.

3. Clear the meta-devices that we associated with the failed disk

  metaclear d2
  metaclear d12
  metaclear d22
  metaclear d32
  metaclear d42
  metaclear d52

4. Find the correct Ap_Id for the failed disk, with the cfgadm command

  cfgadm -al

  Ap_Id                          Type         Receptacle   Occupant     Condition
  c0                             scsi-bus     connected    configured   unknown
  c0::dsk/c0t0d0                 disk         connected    configured   unknown
  '''c0::dsk/c0t1d0'''                 disk         connected    configured   unknown
  c1                             scsi-bus     connected    unconfigured unknown
  usb0/1                         unknown      empty        unconfigured ok
  usb0/2                         unknown      empty        unconfigured ok

5. Unconfigure the device so that you can remove it

  cfgadm -c unconfigure c0::dsk/c0t1d0

6. Check that the device is now unconfigured

  cfgadm -al

  Ap_Id                          Type         Receptacle   Occupant     Condition
  c0                             scsi-bus     connected    configured   unknown
  c0::dsk/c0t0d0                 disk         connected    configured   unknown
  '''c0::dsk/c0t1d0'''                 disk         connected    '''unconfigured''' unknown
  c1                             scsi-bus     connected    unconfigured unknown
  usb0/1                         unknown      empty        unconfigured ok
  usb0/2                         unknown      empty        unconfigured ok

7. Physically replace the failed drive

8. Use cfgadm to see if the OS has automatically configured the drive

  cfgadm -al

If the status of the drive hasn't changed to 'configured', change it manually

  cfgadm -c configure c0::dsk/c0t1d0

9. Use the format command to check that the OS can see the drive.

  format

  Searching for disks...done
  
  
  AVAILABLE DISK SELECTIONS:
         0. c0t0d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
            /pci@1c,600000/scsi@2/sd@0,0
         1. c0t1d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
            /pci@1c,600000/scsi@2/sd@1,0
  Specify disk (enter its number):

10.