Root & Swap Mirroring

                                                

      Root & Swap Mirroring

Disks:   c1t0d0 & c1t1d0

Steps :( root Mirroring)

1. Create the   /root (30GB) & /Swap (64GB) partitions during the OS installation on c1t0d0.

2. i.e., c1t0d0s0 --- root       c1t0d0s1 --- swap

3. Create partition for State Database (Metadb) on c1t0d0s7 (125MB)

4. Copy the VTOC of c1t0d0 (1^st Disk) to c1t1d0 (2^nd Disk).

5. i.e., #prtvtoc    /dev/rdsk/ c1t0d0s2 |fmthard  –s  -  /dev/rdsk/c1t1d0s2

6. Create three copies of metadb on c1t0d0s7 & c1t1d0s7

7. i.e., #metadb -f -a -c3 c1t0d0s7 c1t1d0s7 (In c 3 … 3 is the no of db copy)

8. Create the Meta volume for /root

9. i.e., #metainit  -f  d11  1  1  c0t0d0s0  &   # metainit  d12  1  1  c0t1d0s0

10. Create the mirror volume

11. i.e., # metainit  d10 –m   d11

12. Update the /etc/Vfstab & /etc/system file entries by using metaroot command.

13. i.e., #metaroot   d10

14. Reboot the system (init 6)

15. Attach the d12 volume with the mirror.

16. i.e., # metattach d10 d12

17. Add the entry in /etc/system file.

18. i.e., set md: mirrored_root_flag=1

19. Edit the EEPROM Values.

20. i.e., #eeprom local-mac  address?true

21. eeprom AUTO BOOT=?true

22.

23. Boot Block installation on the second disk.

24. i.e., #/usr/platform/`uname – i`

              #cd lib

             #cd ufs

             #installboot    bootblk  /dev/rdsk/c1t1d0s0

25. To check the physical path of the second disk

      #ls –lrt /dev/dsk/c0t1d0s0

26. To add the entry in the EEPROM for root disk & root mirror  label on the second disk.

      #eeprom "nvramrc=devalias rootdisk /pci@9,600000/SUNW,qlc@2/fp@0,0/disk@1,0 \ > devalias rootmirror /pci@9,600000/SUNW,qlc@2/fp@0,0/disk@0,0"

27. To boot from root disk& root mirror for checking purpose.

       OK  boot  -v  rootdisk 

       OK  boot  –v  rootmirror

Steps:  Swap Mirroring

1.  Create the Meta volume for /Swap

2.  i.e., #metainit  -f  d21  1  1  c0t0d0s1      &           # metainit  d22  1  1  c0t1d0s1 

3. Create the mirror volume

4. . i.e., # metainit d20 –m   d21 

5. # metattach d20 d22

6. dumpadm   -d  /dev/md/dsk/d20 (To add the crash dump device)

7. #dumpadm (To list the dump device)

8. #swap   -a  /dev/md/dsk/c1t0d0s1 (To add the Swap space )

9. #swap –l  (To list the swap space allocated)