Solaris 10 - Create software RAID 1
I worked on Unix many years ago, however, Solaris, AIX and HP-Unix are the platforms I often did with. I'm DBA, but there are not any System Administrator in my company, and I .. do the System's business at all.
Before ZFS becomes popular, UFS was always the best choice for Solaris, especially in M's series, example: Sun M-3000, M-4000, M-5000 ...etc. The M series does not support Hardware Raid, but only software, and this article do the brief of creating the software raid in. It's one of task list before configuration and installation Oracle in Solaris 10.
1- Duplicate the layout from the first harddrive to the 2nd harddrive
a. Define the disks
partition> p Volume: solaris Current partition table (original): Total disk cylinders available: 64986 + 2 (reserved cylinders) Part Tag Flag Cylinders Size Blocks 0 root wm 0 - 14 132.10MB (15/0/0) 270540 1 swap wu 15 - 29 132.10MB (15/0/0) 270540 2 backup wu 0 - 64985 558.89GB (64986/0/0) 1172087496 3 usr wm 30 - 29098 250.00GB (29069/0/0) 524288484 4 usr wm 29099 - 60493 270.00GB (31395/0/0) 566240220 5 unassigned wu 0 0 (0/0/0) 0 6 unassigned wu 0 0 (0/0/0) 0 7 unassigned wm 60496 - 60507 105.68MB (12/0/0) 216432
b. Duplicate the layout
# prtvtoc /dev/rdsk/c0t5000CCA03C6563D0d0s2 | fmthard -s - /dev/rdsk/c0t5000CCA03C574254d0s2 fmthard: New volume table of contents now in place.
c. Note: In which disks, the slice 2 is the whole disk using name backup (VTOC_BACKUP)
partition> p Volume: solaris Current partition table (original): Total disk cylinders available: 64986 + 2 (reserved cylinders) Part Tag Flag Cylinders Size Blocks 0 root wm 0 - 14 132.10MB (15/0/0) 270540 1 swap wu 15 - 29 132.10MB (15/0/0) 270540 2 backup wu 0 - 64985 558.89GB (64986/0/0) 1172087496 3 usr wm 30 - 29098 250.00GB (29069/0/0) 524288484 4 usr wm 29099 - 60493 270.00GB (31395/0/0) 566240220 5 unassigned wu 0 0 (0/0/0) 0 6 unassigned wu 0 0 (0/0/0) 0 7 unassigned wm 60496 - 60507 105.68MB (12/0/0) 216432
Note: Do not device remain disk, using format 1 disk, copy the layout to disk 2
2- Create a slice to contain the metadb
7 unassigned wm 60496 - 60507 105.68MB (12/0/0) 216432
Note:
- The slice 7 is contains metadb, slice 3 & 4 is used for file system
3- Create the metadb
# metadb -af -c 2 /dev/rdsk/c0t5000CCA03C6563D0d0s7 /dev/rdsk/c0t5000CCA03C574254d0s7
# metadb
flags first blk block count
a u 16 8192 /dev/dsk/c0t5000CCA03C6563D0d0s7
a u 8208 8192 /dev/dsk/c0t5000CCA03C6563D0d0s7
a u 16 8192 /dev/dsk/c0t5000CCA03C574254d0s7
a u 8208 8192 /dev/dsk/c0t5000CCA03C574254d0s7
4- Initialize the RAID device
# metainit -f d10 1 1 /dev/dsk/c0t5000CCA03C6563D0d0s0
d10: Concat/Stripe is setup
# metainit -f d20 1 1 /dev/dsk/c0t5000CCA03C574254d0s0
d20: Concat/Stripe is setup
# metainit d0 -m d10
d0: Mirror is setup
# metainit -f d11 1 1 /dev/dsk/c0t5000CCA03C6563D0d0s1
d11: Concat/Stripe is setup
# metainit -f d21 1 1 /dev/dsk/c0t5000CCA03C574254d0s1
d21: Concat/Stripe is setup
# metainit d1 -m d11
d1: Mirror is setup
# metainit d13 1 1 /dev/dsk/c0t5000CCA03C6563D0d0s3
d13: Concat/Stripe is setup
# metainit d23 1 1 /dev/dsk/c0t5000CCA03C574254d0s3
d23: Concat/Stripe is setup
# metainit d3 -m d13
# metainit d14 1 1 /dev/dsk/c0t5000CCA03C6563D0d0s4
d14: Concat/Stripe is setup
# metainit d24 1 1 /dev/dsk/c0t5000CCA03C574254d0s4
# metainit d4 -m d14
d4: Mirror is setup
5- Attach the primary disk devices to RAID devices
# lockfs -fa
# init 6
# metattach d0 d20
d0: submirror d20 is attached
#metattach d1 d21
d1: submirror d21 is attached
#metattach d3 d23
d3: submirror d23 is attached
#metattach d4 d24
d4: submirror d24 is attached
6- Verify
# metastat d20
d20: Concat/Stripe
Size: 270540 blocks (132 MB)
Stripe 0:
Device Start Block Dbase State Reloc Hot Spare
/dev/dsk/c0t5000CCA03C574254d0s0 0 No Okay Yes
Device Relocation Information:
Device Reloc Device ID
/dev/dsk/c0t5000CCA03C574254d0 Yes id1,sd@n5000cca03c574254
# metastat d21
d21: Concat/Stripe
Size: 270540 blocks (132 MB)
Stripe 0:
Device Start Block Dbase State Reloc Hot Spare
/dev/dsk/c0t5000CCA03C574254d0s1 0 No Okay Yes
Device Relocation Information:
Device Reloc Device ID
/dev/dsk/c0t5000CCA03C574254d0 Yes id1,sd@n5000cca03c574254
# metastat d23
d23: Concat/Stripe
Size: 524288484 blocks (250 GB)
Stripe 0:
Device Start Block Dbase State Reloc Hot Spare
/dev/dsk/c0t5000CCA03C574254d0s3 0 No Okay Yes
Device Relocation Information:
Device Reloc Device ID
/dev/dsk/c0t5000CCA03C574254d0 Yes id1,sd@n5000cca03c574254
# metastat d24
d24: Concat/Stripe
Size: 566240220 blocks (270 GB)
Stripe 0:
Device Start Block Dbase State Reloc Hot Spare
/dev/dsk/c0t5000CCA03C574254d0s4 0 No Okay Yes
Device Relocation Information:
Device Reloc Device ID
/dev/dsk/c0t5000CCA03C574254d0 Yes id1,sd@n5000cca03c574254
7- Format and mount the new file system (/u01)
# newfs -i 8192 /dev/md/rdsk/d3
newfs: /dev/md/rdsk/d3 last mounted as /u01
newfs: construct a new file system /dev/md/rdsk/d3: (y/n)? y
Warning: 3612 sector(s) in last cylinder unallocated
/dev/md/rdsk/d3: 524288484 sectors in 85334 cylinders of 48 tracks, 128 sectors
256000.2MB in 5334 cyl groups (16 c/g, 48.00MB/g, 5824 i/g)
super-block backups (for fsck -F ufs -o b=#) at:
32, 98464, 196896, 295328, 393760, 492192, 590624, 689056, 787488, 885920,
Initializing cylinder groups:
...............................................................................
...........................
super-block backups for last 10 cylinder groups at:
523372064, 523470496, 523568928, 523667360, 523765792, 523864224, 523962656,
524061088, 524159520, 524257952
# cat /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/c1t3FE5F2A4BF195FB2d0s1 - - swap - no -
/dev/dsk/c1t3FE5F2A4BF195FB2d0s0 /dev/rdsk/c1t3FE5F2A4BF195FB2d0s0 / ufs 1 no -
/dev/dsk/c1t3FE5F2A4BF195FB2d0s3 /dev/rdsk/c1t3FE5F2A4BF195FB2d0s3 /usr ufs 1 no -
/dev/dsk/c1t3FE5F2A4BF195FB2d0s2 /dev/rdsk/c1t3FE5F2A4BF195FB2d0s2 /var ufs 1 no -
/dev/dsk/c1t3FE5F2A4BF195FB2d0s5 /dev/rdsk/c1t3FE5F2A4BF195FB2d0s5 /bh ufs 2 yes -
/dev/dsk/c1t3FE5F2A4BF195FB2d0s4 /dev/rdsk/c1t3FE5F2A4BF195FB2d0s4 /bhapp ufs 2 yes -
/dev/md/dsk/d3 /dev/md/rdsk/d3 /u01 ufs 2 yes -
/devices - /devices devfs - no -
sharefs - /etc/dfs/sharetab sharefs - no -
ctfs - /system/contract ctfs - no -
objfs - /system/object objfs - no -
swap - /tmp tmpfs - yes -
8- Guideline:
a. This document is used to make a metadb and mirror without root, swap slice. The disks contain the root, swap but they are not usable. The real is in another disks
b. The mirror creation is 1-1 but not resynchronization
c. In step 7, using “newfs –i 8192 /dev/md/rdsk/d3” only enough demonstration, the others can be configured same.
d. In Solaris 10, not necessary to create RAID 0+1 or RAID 1+0 which must be configure in Solaris 9. In Solaris 9, a whole RAID 0 contains 2 disk must be configure, then, RAID 1 mirroring slice by slice inside.
In my attached file, there is demonstration by image.
Hope this help
TAT
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