SUMMARY: migrating boot disk (root_domain) from one EVA to another

Thanks to Jean-marc, DAvid, Thomas, Johan, Bruce, Chris, Jason, and Bluejay.

The procedure I used, that worked, was...

- present new root lun from 8100
- hwmgr sc sc
- hwmgr sh sc / hwmgr v d  (note Lun # /OSID of new disk)
- disklabel -rw –tadvfs /dev/rdisk/dskxxa (making it bootable)
- start exceed / export display / start diskconfig 
    - partition a as advfs, and h as swap
- mkfdmn –r /dev/disk/dskxxa root2_domain
- mkfset root2_domain root
- mkdir /root2
- mount –tadvfs root2_domain#root /root2
- shutdown system application
- vdump -0f - / | vrestore -xf - -D /root2
- check /etc/sysconfigtab for swap disks.  Remove old ones, put disk part in.
- bring to single user mode(init s)
- add to fstab file so that root2_domain#root mounts to / 
- change fstab file so that root_domain#root is renamed to oldroot_domain#root mounted to /oldroot
- mkdir /oldroot
- change root_domain to oldroot_dominan in /etc/fdmns
- halt system (shutdown -h) to SRM prompt, show old boot device
    -  P00>>> show bootdef_dev  (pga...)
- go into wwidmgr and quickset to new lun paths
    -  P00>>> init
    -  P00>>> wwidmgr -show wwid  (take note of old boot disks)
-    P00>>> wwidmgr -clear all
    -  P00>>> wwidmgr -show wwid   (find UDID that matches OSID from lun on 8100)
    -  P00>>> init
-    P00>>> wwidmgr -quickset -udid ##  (## is OSID of lun. do for one path from each controller)
-    P00>>> init
-    P00>>> show dev kgpsa*  (find pga* names of devices to boot)
-    P00>>> init
    -  P00>>> set bootdev_dev  pga*..., pgb*...  
- b -fl s (boot to single user mode)
- If it boots from new disk, continue to multiuser mode (CTRL D)
- df to see that the root2_domain is mounted on /
- ls –lR /etc/fdmns/*  -  make sure root2_domain is pointing to right disk



----- Original Message ----
From: Rich Glazier <[email protected]>
To: [email protected]
Sent: Wednesday, February 4, 2009 7:58:16 PM
Subject: migrating boot disk (root_domain) from one EVA to another

5.1A PK6, DS20E, EVA5000

Managers,

I know that the root domain is the only domain in AdvFS that you can not add a volume to.  We are migrating our storage from an old EVA5000 to a new EVA8100, and I've been using addvol/rmvol to accomplish this for the non root domains. 

    (presented a new lun from the 8100, labeled it, added the volume into the domain (addvol), and removed the 
    old 5000 volume from the domain (rmvol)).

I can not do this for the bootable root disk; I boot off the SAN.  I need to migrate the root_domain another way.  Here was my plan.  Please see if this seems sounds.  If there's a better way to do it, or if anyone has done it, please let me know.

- present new root lun from 8100
- hwmgr sc sc
- hwmgr sh sc / hwmgr v d  (note Lun # /OSID of new disk)
- disklabel -rw new disk (making it bootable)
- mkfdmn /dev/disk/dskxx root2_domain
- mkfset root2_domain root
- mkdir /root2
- mount root2_domain#root /root2
- shutdown system application
- vdump -0f - / | vrestore -xf - -D /root2
- change system to not reboot
    - consvar -s auto_action HALT
    - consvar -l (see that it changed)
    - consvar -a (write it to NVRAM)
- bring to single user mode (init s)
- change fstab file so that root2_domain#root mounts to / 
- change fstab file- comment out root_domain#root mount
- shutdown system (halt) to SRM prompt, show old boot device
     -P00>>> show bootdef_dev  (pga...)
- go into wwidmgr and quickset to new lun paths
    - P00>>> wwidmgr -show wwid  (take not of old boot disks)
    - P00>>> init
    - P00>>> set mode diag
    - P00>>> init
     -P00>>> wwidmgr -clear all
     -P00>>> init
    - P00>>> wwidmgr -show wwid   (find UDID that matches OSID from lun on 8100)
    - P00>>> init
     -P00>>> wwidmgr -quickset -udid ##  (## is OSID of lun. do for one path from each controller)
     -P00>>> init
     -P00>>> show dev kgpsa*  (find pga* names of devices to boot)
     -P00>>> init
     -P00>>> set bootdev_dev  pga*..., pgb*...  
- Change console from HALT to BOOT
     -P00>>> set auto_action boot
- b -fl s (boot to single user mode)
- If it boots from new disk, continue to multiuser mode (CTRL D)


Thanks for the help,

Rich