Solaris Volume Manager -4 [raid 5]

                     

                           SVM-4

What we will learn in next Few Pages

·         Raid5

(Plz watch the videos from this blog for better understanding of raid levels)

OK… Let’s create raid 5 with SVM,

Should we use Soft Partitions for SVM or we need to go with Physical slices?

Well… we can go in both ways, let’s see with SP’s

Create Metadb

root@sol-test-2:>/# metadb -afc 3 c1t0d0s7 c1t1d0s7

Create partitions of any size a/c to convenience

Part      Tag    Flag     Cylinders        Size            Blocks

  0 unassigned    wm       0 -  652        5.00GB    (653/0/0)  10490445

  1 unassigned    wm     653 -  914        2.01GB    (262/0/0)   4209030

  2     backup    wu       0 - 1562       11.97GB    (1563/0/0) 25109595

  3 unassigned    wm     915 - 1176        2.01GB    (262/0/0)   4209030

  4 unassigned    wm    1177 - 1438        2.01GB    (262/0/0)   4209030

  5 unassigned    wm    1439 - 1558      941.31MB    (120/0/0)   1927800

Now we need to create SP’s

We will create d11 d12 & d13

root@sol-test-2:>/# metainit d11 -p c1t2d0s0 100m

d11: Soft Partition is setup

root@sol-test-2:>/# metainit d12 -p c1t2d0s0 100m

d12: Soft Partition is setup

root@sol-test-2:>/# metainit d13 -p c1t2d0s0 100m

d13: Soft Partition is setup

Now create the metadevice and create raid5

root@sol-test-2:>/# metainit d2 -r d11 d12 d13

d2: RAID is setup

Now check what we had created

root@sol-test-2:>/# metastat -c

d2               r  196MB d11 d12 d13

    d11          p  100MB c1t2d0s0

    d12          p  100MB c1t2d0s0

    d13          p  100MB c1t2d0s0

So we have raid5 volume d2 of 196mb

Now expand this d2

root@sol-test-2:>/# metainit d15 -p c1t2d0s0 100mb

root@sol-test-2:>/# metattach d2 d15

root@sol-test-2:>/# metastat -c

d2               r  298MB d11 d12 d13 d15

    d11          p  100MB c1t2d0s0

    d12          p  100MB c1t2d0s0

    d13          p  100MB c1t2d0s0

    d15          p  100MB c1t2d0s0

Let’s create Soft Partitions from the d2

root@sol-test-2:>/# metainit d21 -p d2 10m

d21: Soft Partition is setup

root@sol-test-2:>/# metainit d22 -p d2 10m

d22: Soft Partition is setup

root@sol-test-2:>/# metainit d23 -p d2 10m

d23: Soft Partition is setup

root@sol-test-2:>/# metastat -c

d23              p   10MB d2

d22              p   10MB d2

d21              p   10MB d2

    d2           r  298MB d11 d12 d13 d15

        d11      p  100MB c1t2d0s0

        d12      p  100MB c1t2d0s0

        d13      p  100MB c1t2d0s0

        d15      p  100MB c1t2d0s0

 

root@sol-test-2:>/# metainit -f d31 1 1 c1t2d0s0

d31: Concat/Stripe is setup

root@sol-test-2:>/# metainit -f d32 1 1 c1t2d0s1

d32: Concat/Stripe is setup

root@sol-test-2:>/# metainit -f d33 1 1 c1t2d0s3

d33: Concat/Stripe is setup

root@sol-test-2:>/# metainit d100 -r d31 d32 d33

metainit: sol-test-2: d31: is a metadevice

Why I am unable to create raid5???

root@sol-test-2:>/# metaclear d31

d31: Concat/Stripe is cleared

root@sol-test-2:>/# metaclear d32 d33

d32: Concat/Stripe is cleared

d33: Concat/Stripe is cleared

root@sol-test-2:>/# metainit d3 -r c1t2d0s0 c1t2d0s1 c1t2d0s3

d3: RAID is setup

root@sol-test-2:>/# metastat -c

d3               r  4.0GB c1t2d0s0 (initializing) c1t2d0s1 (initializing) c1t2d0s3 (initializing)

root@sol-test-2:>/# metastat d3

d3: RAID

    State: Initializing

    Initialization in progress: 29.5% done

    Interlace: 32 blocks

    Size: 8369865 blocks (4.0 GB)

Original device:

    Size: 8385216 blocks (4.0 GB)

        Device     Start Block  Dbase        State Reloc  Hot Spare

        c1t2d0s0      16395        No Initializing   Yes

        c1t2d0s1        330        No Initializing   Yes

        c1t2d0s3        330        No Initializing   Yes

Device Relocation Information:

Device   Reloc  Device ID

c1t2d0   Yes    id1,sd@n6000c292a7dde1da7cb7b6bc4f82b207