SUMMARY: mirror 2 different geometry disks?

Daryl.Mitchell at us.o-i.com Daryl.Mitchell at us.o-i.com
Mon Aug 1 11:29:15 EDT 2005


I received a ton of replies.  Many thanks to everyone.  The consensus was
that Yes, this mirroring will work as long as submirror 2 is slightly
larger.  And it did work flawlessly.  The only caveat is that if I lose
submirror 1 (the smaller disk), I'll probably need another 18GB drive to
restore the mirror pair.   I'm cool with that because we have a bunch of
18GB spares here doing nothing.

Thanks gang and cheers.
Daryl

# /usr/opt/SUNWmd/sbin/metastat
d0: Mirror
    Submirror 0: d10
      State: Okay
    Submirror 1: d20
      State: Okay
    Pass: 1
    Read option: roundrobin (default)
    Write option: parallel (default)
    Size: 5084856 blocks

d10: Submirror of d0
    State: Okay
    Size: 5084856 blocks
    Stripe 0:
        Device              Start Block  Dbase State        Hot Spare
        c0t0d0s0                   0     No    Okay


d20: Submirror of d0
    State: Okay
    Size: 5088960 blocks
    Stripe 0:
        Device              Start Block  Dbase State        Hot Spare
        c0t2d0s0                   0     No    Okay


d1: Mirror
    Submirror 0: d11
      State: Okay
    Submirror 1: d21
      State: Okay
    Pass: 1
    Read option: roundrobin (default)
    Write option: parallel (default)
    Size: 4194288 blocks

d11: Submirror of d1
    State: Okay
    Size: 4194288 blocks
    Stripe 0:
        Device              Start Block  Dbase State        Hot Spare
        c0t0d0s1                   0     No    Okay


d21: Submirror of d1
    State: Okay
    Size: 4198392 blocks
    Stripe 0:
        Device              Start Block  Dbase State        Hot Spare
        c0t2d0s1                   0     No    Okay


d3: Mirror
    Submirror 0: d13
      State: Okay
    Submirror 1: d23
      State: Okay
    Pass: 1
    Read option: roundrobin (default)
    Write option: parallel (default)
    Size: 4197879 blocks

d13: Submirror of d3
    State: Okay
    Size: 4197879 blocks
    Stripe 0:
        Device              Start Block  Dbase State        Hot Spare
        c0t0d0s3                   0     No    Okay


d23: Submirror of d3
    State: Okay
    Size: 4198392 blocks
    Stripe 0:
        Device              Start Block  Dbase State        Hot Spare
        c0t2d0s3                   0     No    Okay


d4: Mirror
    Submirror 0: d14
      State: Okay
    Submirror 1: d24
      State: Okay
    Pass: 1
    Read option: roundrobin (default)
    Write option: parallel (default)
    Size: 4197879 blocks

d14: Submirror of d4
    State: Okay
    Size: 4197879 blocks
    Stripe 0:
        Device              Start Block  Dbase State        Hot Spare
        c0t0d0s4                   0     No    Okay


d24: Submirror of d4
    State: Okay
    Size: 4198392 blocks
    Stripe 0:
        Device              Start Block  Dbase State        Hot Spare
        c0t2d0s4                   0     No    Okay





                                                                           
             Daryl A                                                       
             Mitchell/User/O-I                                             
                                                                        To 
             07/29/2005 08:59          sunmanagers at sunmanagers.org         
             AM                                                         cc 
                                                                           
                                                                   Subject 
                                       mirror 2 different geometry disks?  
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           



I have a 9gb and an 18gb drive in one of my E10K's D1000.  I'd like to
disksuite them up for a more fault tolerant boot pair.  The 9gb drive is my
current boot drive.  But when I try to fmthard the 18gb drive, it complains
that the sector ends not at the cylinder end or something.  So I got it
partitioned as close as I could manually.   Can I mirror these up with
disksuite still even though the geometries are not exactly alike?  I've
made the new disk partitions slightly bigger than the original.

D


CURRENT BOOT DISK:

Total disk cylinders available: 4924 + 2 (reserved cylinders)

Part      Tag    Flag     Cylinders        Size            Blocks
  0       root    wm       0 - 1415        2.42GB    (1416/0/0)  5084856
  1       swap    wu    1416 - 2583        2.00GB    (1168/0/0)  4194288
  2     backup    wm       0 - 4923        8.43GB    (4924/0/0) 17682084
  3        var    wm    2584 - 3752        2.00GB    (1169/0/0)  4197879
  4 unassigned    wm    3753 - 4921        2.00GB    (1169/0/0)  4197879
  5 unassigned    wm    4922 - 4922        1.75MB    (1/0/0)        3591
  6 unassigned    wm    4923 - 4923        1.75MB    (1/0/0)        3591
  7 unassigned    wm       0               0         (0/0/0)           0


I'D LIKE TO MIRROR TO THIS NEW 18GB DRIVE:

Total disk cylinders available: 7506 + 2 (reserved cylinders)

Part      Tag    Flag     Cylinders        Size            Blocks
  0       root    wm       0 - 1079        2.43GB    (1080/0/0)  5088960
  1       swap    wu    1080 - 1970        2.00GB    (891/0/0)   4198392
  2     backup    wm       0 - 7505       16.86GB    (7506/0/0) 35368272
  3        var    wm    1971 - 2861        2.00GB    (891/0/0)   4198392
  4 unassigned    wm    2862 - 3752        2.00GB    (891/0/0)   4198392
  5 unassigned    wm    3753 - 3753        2.30MB    (1/0/0)        4712
  6 unassigned    wm    3754 - 3754        2.30MB    (1/0/0)        4712
  7 unassigned    wm       0               0         (0/0/0)           0
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