蓝色为输入命令，橙黄色是执行命令的输出结果。
1. First we should be sure have two identical harddisks in the server
# format
Searching for disks...done
AVAILABLE DISK SELECTIONS:
0. c0d0 <DEFAULT cyl 1563 alt 2 hd 255 sec 63>
/pci@0,0/pci-ide@7,1/ide@0/cmdk@0,0
1. c0d1 <DEFAULT cyl 1563 alt 2 hd 255 sec 63>
/pci@0,0/pci-ide@7,1/ide@0/cmdk@1,0
Specify disk (enter its number): ^C
2. Its need to create small slice for metadb information (usually slice 7)
like:
partition> p Current partition table (unnamed): Total disk cylinders available: 1563 + 2 (reserved cylinders) Part Tag Flag Cylinders Size Blocks 0 root wm 518 - 1562 8.01GB (1045/0/0) 16787925 1 swap wu 3 - 133 1.00GB (131/0/0) 2104515 2 backup wm 0 - 1562 11.97GB (1563/0/0) 25109595 3 unassigned wm 0 0 (0/0/0) 0 4 unassigned wm 0 0 (0/0/0) 0 5 unassigned wm 0 0 (0/0/0) 0 6 unassigned wm 0 0 (0/0/0) 0 7 unassigned wm 134 - 135 15.69MB (2/0/0) 32130 8 boot wu 0 - 0 7.84MB (1/0/0) 16065 9 alternates wu 1 - 2 15.69MB (2/0/0) 32130
3. Next step is to create the same partitions on the second disk. To avoid
human error it is much better to use some kind of automations:
prtvtoc /dev/rdsk/c0d0s2 > /tmp/c0d0s2.toc fmthard -s /tmp/c0d0s2.toc /dev/rdsk/c0d1s2
4. Then we should identify the partitions need to be mirrored:
# egrep "ufs|swap" /etc/vfstab|grep "/dev/dsk" /dev/dsk/c0d0s1 - - swap - no - /dev/dsk/c0d0s0 /dev/rdsk/c0d0s0 / ufs 1 no -
LVM
1. Let’s create few copies of metadb on the partitions we create for this
puspose:
# metadb -a -f -c 2 c0d0s7 c0d1s7
2. It’s time to put our disks where OS reside under management of SVM
# metainit -f d10 1 1 c0d0s0 d10: Concat/Stripe is setup # metainit -f d11 1 1 c0d0s1 d11: Concat/Stripe is setup # metainit d0 -m d10 d0: Mirror is setup # metainit d1 -m d11 d1: Mirror is setup # metaroot d0 # echo "set md:mirrored_root_flag=1" >> /etc/system
3. Check newly created devices:
# ls -l /dev/md/rdsk total 8 lrwxrwxrwx 1 root root 36 Aug 30 18:29 d0 -> ../../../devices/pseudo/md@0:0,0,raw lrwxrwxrwx 1 root root 36 Aug 30 18:29 d1 -> ../../../devices/pseudo/md@0:0,1,raw lrwxrwxrwx 1 root root 37 Aug 30 18:28 d10 -> ../../../devices/pseudo/md@0:0,10,raw lrwxrwxrwx 1 root root 37 Aug 30 18:28 d11 -> ../../../devices/pseudo/md@0:0,11,raw # ls -l /dev/md/dsk total 8 lrwxrwxrwx 1 root root 36 Aug 30 18:29 d0 -> ../../../devices/pseudo/md@0:0,0,blk lrwxrwxrwx 1 root root 36 Aug 30 18:29 d1 -> ../../../devices/pseudo/md@0:0,1,blk lrwxrwxrwx 1 root root 37 Aug 30 18:28 d10 -> ../../../devices/pseudo/md@0:0,10,blk lrwxrwxrwx 1 root root 37 Aug 30 18:28 d11 -> ../../../devices/pseudo/md@0:0,11,blk
4. Make appropriate changes in /etc/vfstab to get boot from mirror, not
standard disks
# egrep "ufs|swap" /etc/vfstab|grep "/dev/md/dsk" /dev/md/dsk/d1 - - swap - no - /dev/md/dsk/d0 /dev/md/rdsk/d0 / ufs 1 no -
5. The next step is to flush cache buffers and reboot
# sync;sync;sync # reboot
6. It is time to put second disk under management of SVN
# metainit -f d20 1 1 c0d1s0 d20: Concat/Stripe is setup # metainit -f d21 1 1 c0d1s1 d21: Concat/Stripe is setup
7. And to add them to created previously mirrors. Be aware process of
synchronisation will continue in background and you can check the process
# metattach d0 d20 d0: submirror d20 is attached # metattach d1 d21 d1: submirror d21 is attached
8. Check the process of building mirrors and wait till they finnish
# metastat
d1: Mirror
Submirror 0: d11
State: Okay
Submirror 1: d21
State: Resyncing
Resync in progress: 96 % done
Pass: 1
Read option: roundrobin (default)
Write option: parallel (default)
Size: 2104515 blocks (1.0 GB)
d11: Submirror of d1
State: Okay
Size: 2104515 blocks (1.0 GB)
Stripe 0:
Device Start Block Dbase State Reloc Hot Spare
c0d0s1 0 No Okay Yes
d21: Submirror of d1
State: Resyncing
Size: 2104515 blocks (1.0 GB)
Stripe 0:
Device Start Block Dbase State Reloc Hot Spare
c0d1s1 0 No Okay Yes
d0: Mirror
Submirror 0: d10
State: Okay
Submirror 1: d20
State: Resyncing
Resync in progress: 13 % done
Pass: 1
Read option: roundrobin (default)
Write option: parallel (default)
Size: 16787925 blocks (8.0 GB)
d10: Submirror of d0
State: Okay
Size: 16787925 blocks (8.0 GB)
Stripe 0:
Device Start Block Dbase State Reloc Hot Spare
c0d0s0 0 No Okay Yes
d20: Submirror of d0
State: Resyncing
Size: 16787925 blocks (8.0 GB)
Stripe 0:
Device Start Block Dbase State Reloc Hot Spare
c0d1s0 0 No Okay Yes
Device Relocation Information:
Device Reloc Device ID
c0d1 Yes id1,cmdk@AVMware_Virtual_IDE_Hard_Drive=01000000000000000001
c0d0 Yes id1,cmdk@AVMware_Virtual_IDE_Hard_Drive=00000000000000000001
Boot
1. Next step is to check if partition on second disk is active
# fdisk /dev/rdsk/c0d1p0
Total disk size is 1566 cylinders
Cylinder size is 16065 (512 byte) blocks
Cylinders
Partition Status Type Start End Length %
========= ====== ============ ===== === ====== ===
1 Active Solaris2 1 1565 1565 100
SELECT ONE OF THE FOLLOWING:
1. Create a partition
2. Specify the active partition
3. Delete a partition
4. Change between Solaris and Solaris2 Partition IDs
5. Exit (update disk configuration and exit)
6. Cancel (exit without updating disk configuration)
Enter Selection: 5
2. And to add boot record to the second disk to make it bootable
# /sbin/installgrub /boot/grub/stage1 /boot/grub/stage2 /dev/rdsk/c0d1s0 stage1 written to partition 0 sector 0 (abs 16065) stage2 written to partition 0, 233 sectors starting at 50 (abs 16115)
3. Add new item in the boot menu (/boot/grub/menu.lst) to have alternative
way to boot
# vi /boot/grub/menu.lst 添加以下内容：
title Alternate boot root (hd1,0,a) kernel /platform/i86pc/multiboot module /platform/i86pc/boot_archive
4. Check if the new item is added to the boot menu
# bootadm list-menu The location for the active GRUB menu is: /boot/grub/menu.lst default 0 timeout 10 0 Solaris 10 5/08 s10x_u5wos_10 X86 1 Solaris failsafe 2 Alternate boot
5. That’s all, you have already mirrored root partition (plus swap)