In this post let us discuss about steps of Root and Swap Mirroring.
For mirroring we create meta devices on disks and bring them under control of SVM
(Solaris Volume Manager). RAID 1 technique is called Mirroring.
To perform mirroring ,both the disks should be with same VTOC(Volume Table Of Contents).
login as: root
Using keyboard-interactive authentication.
Password:
Last login: Thu Dec 20 01:09:51 2012
Oracle Corporation SunOS 5.10 Generic Patch January 2005
# bash
bash-3.2#
bash-3.2# df -kh
Filesystem size used avail capacity Mounted on
/dev/dsk/c1t0d0s0 30G 5.6G 24G 20% /
/devices 0K 0K 0K 0% /devices
ctfs 0K 0K 0K 0% /system/contract
proc 0K 0K 0K 0% /proc
mnttab 0K 0K 0K 0% /etc/mnttab
swap 118G 1.6M 118G 1% /etc/svc/volatile
objfs 0K 0K 0K 0% /system/object
sharefs 0K 0K 0K 0% /etc/dfs/sharetab
/platform/sun4u-us3/lib/libc_psr/libc_psr_hwcap2.so.1
30G 5.6G 24G 20% /platform/sun4u-us3/lib/libc_psr.so.1
/platform/sun4u-us3/lib/sparcv9/libc_psr/libc_psr_hwcap2.so.1
30G 5.6G 24G 20% /platform/sun4u-us3/lib/sparcv9/libc_psr.so.1
fd 0K 0K 0K 0% /dev/fd
swap 118G 136K 118G 1% /tmp
swap 118G 40K 118G 1% /var/run
bash-3.2#
##############################
Check whether both disks are of same VTOC , if not copy vtoc of primary disk to secondary....
Creating Meta database on 7th slice. c#t#d#s7
##############################
bash-3.2# format
Searching for disks...done
AVAILABLE DISK SELECTIONS:
0. c1t0d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848>
/pci@8,600000/SUNW,qlc@2/fp@0,0/ssd@w500000e018038181,0
1. c1t1d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848>
/pci@8,600000/SUNW,qlc@2/fp@0,0/ssd@w500000e018038291,0
2. c1t2d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848>
/pci@8,600000/SUNW,qlc@2/fp@0,0/ssd@w500000e01804c751,0
3. c1t3d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848>
/pci@8,600000/SUNW,qlc@2/fp@0,0/ssd@w500000e018046841,0
Specify disk (enter its number): 0
selecting c1t0d0 ---------- selected disk 0.
[disk formatted]
Warning: Current Disk has mounted partitions.
/dev/dsk/c1t0d0s0 is currently mounted on /. Please see umount(1M).
/dev/dsk/c1t0d0s1 is currently used by swap. Please see swap(1M).
FORMAT MENU:
disk - select a disk
type - select (define) a disk type
partition - select (define) a partition table
current - describe the current disk
format - format and analyze the disk
repair - repair a defective sector
label - write label to the disk
analyze - surface analysis
defect - defect list management
backup - search for backup labels
verify - read and display labels
save - save new disk/partition definitions
inquiry - show vendor, product and revision
volname - set 8-character volume name
!<cmd> - execute <cmd>, then return
quit
format> p
PARTITION MENU:
0 - change `0' partition
1 - change `1' partition
2 - change `2' partition
3 - change `3' partition
4 - change `4' partition
5 - change `5' partition
6 - change `6' partition
7 - change `7' partition
select - select a predefined table
modify - modify a predefined partition table
name - name the current table
print - display the current table
label - write partition map and label to the disk
!<cmd> - execute <cmd>, then return
quit
partition> p
Current partition table (original):
Total disk cylinders available: 14087 + 2 (reserved cylinders)
Part Tag Flag Cylinders Size Blocks
0 root wm 0 - 3091 30.01GB (3092/0/0) 62928384
1 swap wu 3092 - 9686 64.00GB (6595/0/0) 134221440
2 backup wm 0 - 14086 136.71GB (14087/0/0) 286698624
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 0 0 (0/0/0) 0
partition> 7
Part Tag Flag Cylinders Size Blocks
7 unassigned wm 0 0 (0/0/0) 0
Enter partition id tag[unassigned]:
Enter partition permission flags[wm]:
Enter new starting cyl[0]: 14070
Enter partition size[0b, 0c, 14070e, 0.00mb, 0.00gb]: 14085e
partition> p
Current partition table (unnamed):
Total disk cylinders available: 14087 + 2 (reserved cylinders)
Part Tag Flag Cylinders Size Blocks
0 root wm 0 - 3091 30.01GB (3092/0/0) 62928384
1 swap wu 3092 - 9686 64.00GB (6595/0/0) 134221440
2 backup wm 0 - 14086 136.71GB (14087/0/0) 286698624
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 14070 - 14085 159.00MB (16/0/0) 325632
partition> 7
Part Tag Flag Cylinders Size Blocks
7 unassigned wm 14070 - 14085 159.00MB (16/0/0) 325632
Enter partition id tag[unassigned]:
Enter partition permission flags[wm]:
Enter new starting cyl[14070]:
Enter partition size[325632b, 16c, 14085e, 159.00mb, 0.16gb]: 0
partition> p
Current partition table (unnamed):
Total disk cylinders available: 14087 + 2 (reserved cylinders)
Part Tag Flag Cylinders Size Blocks
0 root wm 0 - 3091 30.01GB (3092/0/0) 62928384
1 swap wu 3092 - 9686 64.00GB (6595/0/0) 134221440
2 backup wm 0 - 14086 136.71GB (14087/0/0) 286698624
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 0 0 (0/0/0) 0
partition> 7
Part Tag Flag Cylinders Size Blocks
7 unassigned wm 0 0 (0/0/0) 0
Enter partition id tag[unassigned]:
Enter partition permission flags[wm]:
Enter new starting cyl[0]: 14073
Enter partition size[0b, 0c, 14073e, 0.00mb, 0.00gb]: 14085e
partition> p
Current partition table (unnamed):
Total disk cylinders available: 14087 + 2 (reserved cylinders)
Part Tag Flag Cylinders Size Blocks
0 root wm 0 - 3091 30.01GB (3092/0/0) 62928384
1 swap wu 3092 - 9686 64.00GB (6595/0/0) 134221440
2 backup wm 0 - 14086 136.71GB (14087/0/0) 286698624
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 14073 - 14085 129.19MB (13/0/0) 264576
partition> l
Ready to label disk, continue? y
partition>
partition>
partition> p
Current partition table (unnamed):
Total disk cylinders available: 14087 + 2 (reserved cylinders)
Part Tag Flag Cylinders Size Blocks
0 root wm 0 - 3091 30.01GB (3092/0/0) 62928384
1 swap wu 3092 - 9686 64.00GB (6595/0/0) 134221440
2 backup wm 0 - 14086 136.71GB (14087/0/0) 286698624
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 14073 - 14085 129.19MB (13/0/0) 264576
partition>
partition>
partition> q
FORMAT MENU:
disk - select a disk
type - select (define) a disk type
partition - select (define) a partition table
current - describe the current disk
format - format and analyze the disk
repair - repair a defective sector
label - write label to the disk
analyze - surface analysis
defect - defect list management
backup - search for backup labels
verify - read and display labels
save - save new disk/partition definitions
inquiry - show vendor, product and revision
volname - set 8-character volume name
!<cmd> - execute <cmd>, then return
quit
format> q
bash-3.2#
##############################
Creating Meta database on 7th slice of 1st disk. c#t#d#s7
##############################
bash-3.2#
bash-3.2# metadb -f -a -c 3 c1t0d0s7
bash-3.2#
bash-3.2#
bash-3.2# metadb -i
flags first blk block count
a u 16 8192 /dev/dsk/c1t0d0s7
a u 8208 8192 /dev/dsk/c1t0d0s7
a u 16400 8192 /dev/dsk/c1t0d0s7
r - replica does not have device relocation information
o - replica active prior to last mddb configuration change
u - replica is up to date
l - locator for this replica was read successfully
c - replica's location was in /etc/lvm/mddb.cf
p - replica's location was patched in kernel
m - replica is master, this is replica selected as input
W - replica has device write errors
a - replica is active, commits are occurring to this replica
M - replica had problem with master blocks
D - replica had problem with data blocks
F - replica had format problems
S - replica is too small to hold current data base
R - replica had device read errors
bash-3.2#
bash-3.2#
bash-3.2# metainit -f d11 1 1 c1t0d0s0
d11: Concat/Stripe is setup
bash-3.2#
bash-3.2# metainit -f d10 -m d11
d10: Mirror is setup
bash-3.2#
bash-3.2# metastat -c
d10 m 30GB d11
d11 s 30GB c1t0d0s0
bash-3.2#
bash-3.2#
bash-3.2# metainit -f d21 1 1 c1t0d0s1
d21: Concat/Stripe is setup
bash-3.2#
bash-3.2#
bash-3.2# metainit -f d20 -m d21
d20: Mirror is setup
bash-3.2#
bash-3.2#
bash-3.2# metastat -c
d20 m 64GB d21
d21 s 64GB c1t0d0s1
d10 m 30GB d11
d11 s 30GB c1t0d0s0
bash-3.2#
bash-3.2#
bash-3.2# metaroot d10 ------ THIS WILL AUTOMATICALLY UPDATES ENTRY OF
ROOT IN /etc/vfstab
bash-3.2#
bash-3.2#
bash-3.2# more /etc/vfstab
#device device mount FS fsck mount mount
#to mount to fsck point type pass at boot options
#
fd - /dev/fd fd - no -
/proc - /proc proc - no -
/dev/dsk/c1t0d0s1 - - swap - no -
/dev/md/dsk/d10 /dev/md/rdsk/d10 / ufs 1 no -
/devices - /devices devfs - no -
sharefs - /etc/dfs/sharetab sharefs - no -
ctfs - /system/contract ctfs - no -
objfs - /system/object objfs - no -
swap - /tmp tmpfs - yes -
bash-3.2#
##############################
We need to manually update the entry of swap as meta device in /etc/vfstab .
##############################
bash-3.2# vi /etc/vfstab
"/etc/vfstab" 12 lines, 401 characters
#device device mount FS fsck mount mount
#to mount to fsck point type pass at boot options
#
fd - /dev/fd fd - no -
/proc - /proc proc - no -
###/dev/dsk/c1t0d0s1 - - swap - no -
/dev/md/dsk/d20 - - swap - no -
/dev/md/dsk/d10 /dev/md/rdsk/d10 / ufs 1 no -
/devices - /devices devfs - no -
sharefs - /etc/dfs/sharetab sharefs - no -
ctfs - /system/contract ctfs - no -
objfs - /system/object objfs - no -
swap - /tmp tmpfs - yes -
~
~
~
~
"/etc/vfstab" 13 lines, 436 characters
bash-3.2#
bash-3.2#
bash-3.2# more /etc/vfstab
#device device mount FS fsck mount mount
#to mount to fsck point type pass at boot options
#
fd - /dev/fd fd - no -
/proc - /proc proc - no -
###/dev/dsk/c1t0d0s1 - - swap - no -
/dev/md/dsk/d20 - - swap - no -
/dev/md/dsk/d10 /dev/md/rdsk/d10 / ufs 1 no -
/devices - /devices devfs - no -
sharefs - /etc/dfs/sharetab sharefs - no -
ctfs - /system/contract ctfs - no -
objfs - /system/object objfs - no -
swap - /tmp tmpfs - yes -
bash-3.2#
bash-3.2#
##############################
/etc/system gets updated with metaroot d10 cmd automatically.......
##############################
bash-3.2#
bash-3.2#
bash-3.2# cat /etc/system |grep -i root
* Begin MDD root info (do not edit)
rootdev:/pseudo/md@0:0,10,blk
set md:mirrored_root_flag=1
* End MDD root info (do not edit)
bash-3.2#reboot
##############################
Take a reboot of the system and check df -kh output where we can see that root (/) filesystem will be a metadevice under SVM as follows,
bash-3.2# df -kh /
Filesystem size used avail capacity Mounted on
/dev/md/dsk/d10 30G 5.6G 24G 20% /
**********************************************************
Till now which is completed is called as one way mirroring , to make it a 2-way mirror
just bring the secondary disk under SVM ,
create metadb on 7th slice and metadevices for "/ and swap" partitions
then attach to d10 and d20 respectively.
bash-3.2#metadb -a -f -c3 c1t1d0s7
bash-3.2# metainit -f d12 1 1 c1t1d0s0
bash-3.2# metainit -f d22 1 1 c1t1d0s1
bash-3.2# metattach d10 d12
bash-3.2# metattach d20 d22
bash-3.2#metastat -c
d20 m 64GB d21 d22
d21 s 64GB c1t0d0s1
d22 s 64GB c1t1d0s1
d10 m 30GB d11 d12
d11 s 30GB c1t0d0s0
d12 s 30GB c1t1d0s0
************* TWO WAY MIRRORING COMPLETED *************
#################################################
##################### ONE WAY MIRRORING in SHORT #####################
AVAILABLE DISK SELECTIONS:
0. c1t0d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848>
/pci@9,600000/SUNW,qlc@2/fp@0,0/ssd@w21000018628382f9,0
1. c1t1d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848>
/pci@9,600000/SUNW,qlc@2/fp@0,0/ssd@w21000018628389f1,0
Specify disk (enter its number): Specify disk (enter its number):
1) metadb -a -f -c3 c1t0d0s7
2) metainit -f d11 1 1 c1t0d0s0
3) metainit -f d21 1 1 c1t0d0s1
4) metainit d10 -m d11
5) metainit d20 -m d21
6) metaroot d10
7) Edit swap entry in /etc/vfstab and check rootdev entry in /etc/system file.
8) Take reboot , After reboot configure dump device and swap device with new swap (/dev/md/dsk/d20).
###############################################################################
For mirroring we create meta devices on disks and bring them under control of SVM
(Solaris Volume Manager). RAID 1 technique is called Mirroring.
To perform mirroring ,both the disks should be with same VTOC(Volume Table Of Contents).
login as: root
Using keyboard-interactive authentication.
Password:
Last login: Thu Dec 20 01:09:51 2012
Oracle Corporation SunOS 5.10 Generic Patch January 2005
# bash
bash-3.2#
bash-3.2# df -kh
Filesystem size used avail capacity Mounted on
/dev/dsk/c1t0d0s0 30G 5.6G 24G 20% /
/devices 0K 0K 0K 0% /devices
ctfs 0K 0K 0K 0% /system/contract
proc 0K 0K 0K 0% /proc
mnttab 0K 0K 0K 0% /etc/mnttab
swap 118G 1.6M 118G 1% /etc/svc/volatile
objfs 0K 0K 0K 0% /system/object
sharefs 0K 0K 0K 0% /etc/dfs/sharetab
/platform/sun4u-us3/lib/libc_psr/libc_psr_hwcap2.so.1
30G 5.6G 24G 20% /platform/sun4u-us3/lib/libc_psr.so.1
/platform/sun4u-us3/lib/sparcv9/libc_psr/libc_psr_hwcap2.so.1
30G 5.6G 24G 20% /platform/sun4u-us3/lib/sparcv9/libc_psr.so.1
fd 0K 0K 0K 0% /dev/fd
swap 118G 136K 118G 1% /tmp
swap 118G 40K 118G 1% /var/run
bash-3.2#
##############################
Check whether both disks are of same VTOC , if not copy vtoc of primary disk to secondary....
Creating Meta database on 7th slice. c#t#d#s7
##############################
bash-3.2# format
Searching for disks...done
AVAILABLE DISK SELECTIONS:
0. c1t0d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848>
/pci@8,600000/SUNW,qlc@2/fp@0,0/ssd@w500000e018038181,0
1. c1t1d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848>
/pci@8,600000/SUNW,qlc@2/fp@0,0/ssd@w500000e018038291,0
2. c1t2d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848>
/pci@8,600000/SUNW,qlc@2/fp@0,0/ssd@w500000e01804c751,0
3. c1t3d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848>
/pci@8,600000/SUNW,qlc@2/fp@0,0/ssd@w500000e018046841,0
Specify disk (enter its number): 0
selecting c1t0d0 ---------- selected disk 0.
[disk formatted]
Warning: Current Disk has mounted partitions.
/dev/dsk/c1t0d0s0 is currently mounted on /. Please see umount(1M).
/dev/dsk/c1t0d0s1 is currently used by swap. Please see swap(1M).
FORMAT MENU:
disk - select a disk
type - select (define) a disk type
partition - select (define) a partition table
current - describe the current disk
format - format and analyze the disk
repair - repair a defective sector
label - write label to the disk
analyze - surface analysis
defect - defect list management
backup - search for backup labels
verify - read and display labels
save - save new disk/partition definitions
inquiry - show vendor, product and revision
volname - set 8-character volume name
!<cmd> - execute <cmd>, then return
quit
format> p
PARTITION MENU:
0 - change `0' partition
1 - change `1' partition
2 - change `2' partition
3 - change `3' partition
4 - change `4' partition
5 - change `5' partition
6 - change `6' partition
7 - change `7' partition
select - select a predefined table
modify - modify a predefined partition table
name - name the current table
print - display the current table
label - write partition map and label to the disk
!<cmd> - execute <cmd>, then return
quit
partition> p
Current partition table (original):
Total disk cylinders available: 14087 + 2 (reserved cylinders)
Part Tag Flag Cylinders Size Blocks
0 root wm 0 - 3091 30.01GB (3092/0/0) 62928384
1 swap wu 3092 - 9686 64.00GB (6595/0/0) 134221440
2 backup wm 0 - 14086 136.71GB (14087/0/0) 286698624
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 0 0 (0/0/0) 0
partition> 7
Part Tag Flag Cylinders Size Blocks
7 unassigned wm 0 0 (0/0/0) 0
Enter partition id tag[unassigned]:
Enter partition permission flags[wm]:
Enter new starting cyl[0]: 14070
Enter partition size[0b, 0c, 14070e, 0.00mb, 0.00gb]: 14085e
partition> p
Current partition table (unnamed):
Total disk cylinders available: 14087 + 2 (reserved cylinders)
Part Tag Flag Cylinders Size Blocks
0 root wm 0 - 3091 30.01GB (3092/0/0) 62928384
1 swap wu 3092 - 9686 64.00GB (6595/0/0) 134221440
2 backup wm 0 - 14086 136.71GB (14087/0/0) 286698624
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 14070 - 14085 159.00MB (16/0/0) 325632
partition> 7
Part Tag Flag Cylinders Size Blocks
7 unassigned wm 14070 - 14085 159.00MB (16/0/0) 325632
Enter partition id tag[unassigned]:
Enter partition permission flags[wm]:
Enter new starting cyl[14070]:
Enter partition size[325632b, 16c, 14085e, 159.00mb, 0.16gb]: 0
partition> p
Current partition table (unnamed):
Total disk cylinders available: 14087 + 2 (reserved cylinders)
Part Tag Flag Cylinders Size Blocks
0 root wm 0 - 3091 30.01GB (3092/0/0) 62928384
1 swap wu 3092 - 9686 64.00GB (6595/0/0) 134221440
2 backup wm 0 - 14086 136.71GB (14087/0/0) 286698624
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 0 0 (0/0/0) 0
partition> 7
Part Tag Flag Cylinders Size Blocks
7 unassigned wm 0 0 (0/0/0) 0
Enter partition id tag[unassigned]:
Enter partition permission flags[wm]:
Enter new starting cyl[0]: 14073
Enter partition size[0b, 0c, 14073e, 0.00mb, 0.00gb]: 14085e
partition> p
Current partition table (unnamed):
Total disk cylinders available: 14087 + 2 (reserved cylinders)
Part Tag Flag Cylinders Size Blocks
0 root wm 0 - 3091 30.01GB (3092/0/0) 62928384
1 swap wu 3092 - 9686 64.00GB (6595/0/0) 134221440
2 backup wm 0 - 14086 136.71GB (14087/0/0) 286698624
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 14073 - 14085 129.19MB (13/0/0) 264576
partition> l
Ready to label disk, continue? y
partition>
partition>
partition> p
Current partition table (unnamed):
Total disk cylinders available: 14087 + 2 (reserved cylinders)
Part Tag Flag Cylinders Size Blocks
0 root wm 0 - 3091 30.01GB (3092/0/0) 62928384
1 swap wu 3092 - 9686 64.00GB (6595/0/0) 134221440
2 backup wm 0 - 14086 136.71GB (14087/0/0) 286698624
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 14073 - 14085 129.19MB (13/0/0) 264576
partition>
partition>
partition> q
FORMAT MENU:
disk - select a disk
type - select (define) a disk type
partition - select (define) a partition table
current - describe the current disk
format - format and analyze the disk
repair - repair a defective sector
label - write label to the disk
analyze - surface analysis
defect - defect list management
backup - search for backup labels
verify - read and display labels
save - save new disk/partition definitions
inquiry - show vendor, product and revision
volname - set 8-character volume name
!<cmd> - execute <cmd>, then return
quit
format> q
bash-3.2#
##############################
Creating Meta database on 7th slice of 1st disk. c#t#d#s7
##############################
bash-3.2#
bash-3.2# metadb -f -a -c 3 c1t0d0s7
bash-3.2#
bash-3.2#
bash-3.2# metadb -i
flags first blk block count
a u 16 8192 /dev/dsk/c1t0d0s7
a u 8208 8192 /dev/dsk/c1t0d0s7
a u 16400 8192 /dev/dsk/c1t0d0s7
r - replica does not have device relocation information
o - replica active prior to last mddb configuration change
u - replica is up to date
l - locator for this replica was read successfully
c - replica's location was in /etc/lvm/mddb.cf
p - replica's location was patched in kernel
m - replica is master, this is replica selected as input
W - replica has device write errors
a - replica is active, commits are occurring to this replica
M - replica had problem with master blocks
D - replica had problem with data blocks
F - replica had format problems
S - replica is too small to hold current data base
R - replica had device read errors
bash-3.2#
bash-3.2#
bash-3.2# metainit -f d11 1 1 c1t0d0s0
d11: Concat/Stripe is setup
bash-3.2#
bash-3.2# metainit -f d10 -m d11
d10: Mirror is setup
bash-3.2#
bash-3.2# metastat -c
d10 m 30GB d11
d11 s 30GB c1t0d0s0
bash-3.2#
bash-3.2#
bash-3.2# metainit -f d21 1 1 c1t0d0s1
d21: Concat/Stripe is setup
bash-3.2#
bash-3.2#
bash-3.2# metainit -f d20 -m d21
d20: Mirror is setup
bash-3.2#
bash-3.2#
bash-3.2# metastat -c
d20 m 64GB d21
d21 s 64GB c1t0d0s1
d10 m 30GB d11
d11 s 30GB c1t0d0s0
bash-3.2#
bash-3.2#
bash-3.2# metaroot d10 ------ THIS WILL AUTOMATICALLY UPDATES ENTRY OF
ROOT IN /etc/vfstab
bash-3.2#
bash-3.2#
bash-3.2# more /etc/vfstab
#device device mount FS fsck mount mount
#to mount to fsck point type pass at boot options
#
fd - /dev/fd fd - no -
/proc - /proc proc - no -
/dev/dsk/c1t0d0s1 - - swap - no -
/dev/md/dsk/d10 /dev/md/rdsk/d10 / ufs 1 no -
/devices - /devices devfs - no -
sharefs - /etc/dfs/sharetab sharefs - no -
ctfs - /system/contract ctfs - no -
objfs - /system/object objfs - no -
swap - /tmp tmpfs - yes -
bash-3.2#
##############################
We need to manually update the entry of swap as meta device in /etc/vfstab .
##############################
bash-3.2# vi /etc/vfstab
"/etc/vfstab" 12 lines, 401 characters
#device device mount FS fsck mount mount
#to mount to fsck point type pass at boot options
#
fd - /dev/fd fd - no -
/proc - /proc proc - no -
###/dev/dsk/c1t0d0s1 - - swap - no -
/dev/md/dsk/d20 - - swap - no -
/dev/md/dsk/d10 /dev/md/rdsk/d10 / ufs 1 no -
/devices - /devices devfs - no -
sharefs - /etc/dfs/sharetab sharefs - no -
ctfs - /system/contract ctfs - no -
objfs - /system/object objfs - no -
swap - /tmp tmpfs - yes -
~
~
~
~
"/etc/vfstab" 13 lines, 436 characters
bash-3.2#
bash-3.2#
bash-3.2# more /etc/vfstab
#device device mount FS fsck mount mount
#to mount to fsck point type pass at boot options
#
fd - /dev/fd fd - no -
/proc - /proc proc - no -
###/dev/dsk/c1t0d0s1 - - swap - no -
/dev/md/dsk/d20 - - swap - no -
/dev/md/dsk/d10 /dev/md/rdsk/d10 / ufs 1 no -
/devices - /devices devfs - no -
sharefs - /etc/dfs/sharetab sharefs - no -
ctfs - /system/contract ctfs - no -
objfs - /system/object objfs - no -
swap - /tmp tmpfs - yes -
bash-3.2#
bash-3.2#
##############################
/etc/system gets updated with metaroot d10 cmd automatically.......
##############################
bash-3.2#
bash-3.2#
bash-3.2# cat /etc/system |grep -i root
* Begin MDD root info (do not edit)
rootdev:/pseudo/md@0:0,10,blk
set md:mirrored_root_flag=1
* End MDD root info (do not edit)
bash-3.2#reboot
##############################
Take a reboot of the system and check df -kh output where we can see that root (/) filesystem will be a metadevice under SVM as follows,
bash-3.2# df -kh /
Filesystem size used avail capacity Mounted on
/dev/md/dsk/d10 30G 5.6G 24G 20% /
**********************************************************
Till now which is completed is called as one way mirroring , to make it a 2-way mirror
just bring the secondary disk under SVM ,
create metadb on 7th slice and metadevices for "/ and swap" partitions
then attach to d10 and d20 respectively.
bash-3.2#metadb -a -f -c3 c1t1d0s7
bash-3.2# metainit -f d12 1 1 c1t1d0s0
bash-3.2# metainit -f d22 1 1 c1t1d0s1
bash-3.2# metattach d10 d12
bash-3.2# metattach d20 d22
bash-3.2#metastat -c
d20 m 64GB d21 d22
d21 s 64GB c1t0d0s1
d22 s 64GB c1t1d0s1
d10 m 30GB d11 d12
d11 s 30GB c1t0d0s0
d12 s 30GB c1t1d0s0
************* TWO WAY MIRRORING COMPLETED *************
##################### ONE WAY MIRRORING in SHORT #####################
AVAILABLE DISK SELECTIONS:
0. c1t0d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848>
/pci@9,600000/SUNW,qlc@2/fp@0,0/ssd@w21000018628382f9,0
1. c1t1d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848>
/pci@9,600000/SUNW,qlc@2/fp@0,0/ssd@w21000018628389f1,0
Specify disk (enter its number): Specify disk (enter its number):
1) metadb -a -f -c3 c1t0d0s7
2) metainit -f d11 1 1 c1t0d0s0
3) metainit -f d21 1 1 c1t0d0s1
4) metainit d10 -m d11
5) metainit d20 -m d21
6) metaroot d10
7) Edit swap entry in /etc/vfstab and check rootdev entry in /etc/system file.
8) Take reboot , After reboot configure dump device and swap device with new swap (/dev/md/dsk/d20).
###############################################################################
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