PS : applicabel when using Sun StorEdgeTM SAN Foundation with Solaris 8 and 9. 
PS : this procedure assumes that you are using ksh or bash

Procedure: 

* Identify the disk to be removed (df, zpool list, metastat, vxdg list, or other)
* Make sure that the disk is unmounted and removed from volume manger control.
     - zpool detach, metadetach, etc
* Offlin the device: 
    - luxadm -e offline /dev/dsk/c4t34543543534d0s2
* Identify the "Device Address"  for the disk using luxadm display
     - make a variable to hold list of disks from cfgadm:
         - ff="$(cfgadm -al -o show_FCP_dev)"
     -  Identify devices to unconfigure : 
         - for i in $(luxadm display /dev/rdsk/c4t3443543534d0s2 | nawk '/Device Address/ {print $3}') ; do echo "$ff" | hawk -v device=$i '$1 ~ device {print $1}' ; done
* Unconfigure each unit from the last step :
   - cfgadm -o unusable_FCP_dev -c unconfiugre c4::304985094385

A customer needed a small how-to on how to change IP on Solaris 9. This guide works for most Solaris versions I'v tested, except Solaris 11.

* Locate the correct interface using ifconfig -a
     - In this example we assume that the interface is eri0
* Have a look at /etc/hostname.eri0
     - This file might list the IP or a hostname
     - If IP is used directly in this file, you must change this ip to a new ip, or add the hostname instead of the ip (thats the most tidy way of doing it)
* Update /etc/hosts 
     - Locate the same hostname as you found in /etc/hostname.eri0
     - Change the ip to a new value
* Update if needed /etc/defaultrouter to point to your new default router. 
* If the new ip is in a new subnet, update /etc/netmasks with the network name and mask
* Reboot the system using init 6 to make sure that the configuration is valid

If you cant reboot, but need to change the ip on a live system, do all the above steps so you keep the ip on the next reboot, and:

* Login on another interface, from the console or make a temporarily virtual interface
* Make temp interface (not needed if you can login on the console or an other ip): 
    - ifconfig eri0 addif tempip netmasks + up
    - The command will tell you that a new virtual interface is created, make a note of the interface name, as we are removing it later. (it might be somthing like eri0:1)
 * Logout, and login on the new ipaddress
* Change the current ip to new ip: 
    - ifconfig eri0 hostname netmask + up (uses the new ip assisiated with the hostname in /etc/hosts)
* Logout
* Login with the new ip, and that works
* Remove the temporarily interface:
     - ifconfig eri0:1 down
     PS : to remove it completely use ifconfig eri0:1 unplumb. On some solaris versions this will remove all eri0* interfaces, so it might be best to just down the interface.