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# 1  
Disc Needs Maintenance

Hello All

Here I am using Sun V880 server which have discsuit pack of 8 discs with 2 sub mirrors each.

Everything was fine for the last 1 year. Now I am getting problem of taking backup of the server. After analysis what I got that each 2nd submirrors are in NEEDS MAINTENANCE status.

What is the command to make the status of each disc OKEY.

Also please suggest me any preventive action so that will not happen further.

Thanks a Lot.
# 2  
Quote:
Originally Posted by ailnilanjan
Hello All

Here I am using Sun V880 server which have discsuit pack of 8 discs with 2 sub mirrors each.

Everything was fine for the last 1 year. Now I am getting problem of taking backup of the server. After analysis what I got that each 2nd submirrors are in NEEDS MAINTENANCE status.

What is the command to make the status of each disc OKEY.

Also please suggest me any preventive action so that will not happen further.

Thanks a Lot.
You can start with "metasync"

Check out the meta... commands in general
# 3  
Post the output of metastat so that we can get a better idea of the current state of the metadevices.
# 4  
Metastat Status

Quote:
Post the output of metastat so that we can get a better idea of the current state of the metadevices.
axadmin@dodledo:/dodledo/var/home/axadmin
Code:
2ksh$ metastat
d10: Mirror
    Submirror 0: d11
      State: Needs maintenance 
    Submirror 1: d12
      State: Okay         
    Pass: 1
    Read option: roundrobin (default)
    Write option: parallel (default)
    Size: 40968576 blocks

d11: Submirror of d10
    State: Needs maintenance 
    Invoke: metaonline d10 d11
    Size: 40968576 blocks
    Stripe 0:
        Device     Start Block  Dbase State        Hot Spare
        c1t0d0s0          0     No    Okay         


d12: Submirror of d10
    State: Okay         
    Size: 40968576 blocks
    Stripe 0:
        Device     Start Block  Dbase State        Hot Spare
        c1t1d0s0          0     No    Okay         


d20: Mirror
    Submirror 0: d21
      State: Okay         
    Submirror 1: d22
      State: Okay         
    Pass: 1
    Read option: roundrobin (default)
    Write option: parallel (default)
    Size: 8201856 blocks

d21: Submirror of d20
    State: Okay         
    Size: 8201856 blocks
    Stripe 0:
        Device     Start Block  Dbase State        Hot Spare
        c1t0d0s1          0     No    Okay         


d22: Submirror of d20
    State: Okay         
    Size: 8201856 blocks
    Stripe 0:
        Device     Start Block  Dbase State        Hot Spare
        c1t1d0s1          0     No    Okay         


d40: Mirror
    Submirror 0: d41
      State: Needs maintenance 
    Submirror 1: d42
      State: Okay         
    Pass: 1
    Read option: roundrobin (default)
    Write option: parallel (default)
    Size: 40968576 blocks

d41: Submirror of d40
    State: Needs maintenance 
    Invoke: metaonline d40 d41
    Size: 40968576 blocks
    Stripe 0:
        Device      Start Block  Dbase State        Hot Spare
        c1t10d0s1          0     No    Okay         


d42: Submirror of d40
    State: Okay         
    Size: 40968576 blocks
    Stripe 0:
        Device      Start Block  Dbase State        Hot Spare
        c1t11d0s1          0     No    Okay         


d50: Mirror
    Submirror 0: d51
      State: Needs maintenance 
    Submirror 1: d52
      State: Okay         
    Pass: 1
    Read option: roundrobin (default)
    Write option: parallel (default)
    Size: 343785984 blocks

d51: Submirror of d50
    State: Needs maintenance 
    Invoke: metaonline d50 d51
    Size: 343785984 blocks
    Stripe 0: (interlace: 32 blocks)
        Device     Start Block  Dbase State        Hot Spare
        c1t0d0s6          0     No    Okay         
        c1t2d0s6          0     No    Okay         
        c1t4d0s6          0     No    Okay         
        c1t8d0s6          0     No    Okay         


d52: Submirror of d50
    State: Okay         
    Size: 343785984 blocks
    Stripe 0: (interlace: 32 blocks)
        Device     Start Block  Dbase State        Hot Spare
        c1t1d0s6          0     No    Okay         
        c1t3d0s6          0     No    Okay         
        c1t5d0s6          0     No    Okay         
        c1t9d0s6          0     No    Okay         


d60: Mirror
    Submirror 0: d61
      State: Needs maintenance 
    Submirror 1: d62
      State: Okay         
    Pass: 1
    Read option: roundrobin (default)
    Write option: parallel (default)
    Size: 196498560 blocks

d61: Submirror of d60
    State: Needs maintenance 
    Invoke: metaonline d60 d61
    Size: 196498560 blocks
    Stripe 0: (interlace: 32 blocks)
        Device      Start Block  Dbase State        Hot Spare
        c1t10d0s6          0     No    Okay         
        c1t12d0s6          0     No    Okay         


d62: Submirror of d60
    State: Okay         
    Size: 196498560 blocks
    Stripe 0: (interlace: 32 blocks)
        Device      Start Block  Dbase State        Hot Spare
        c1t11d0s6          0     No    Okay         
        c1t13d0s6          0     No    Okay         


d70: Mirror
    Submirror 0: d71
      State: Needs maintenance 
    Submirror 1: d72
      State: Okay         
    Pass: 1
    Read option: roundrobin (default)
    Write option: parallel (default)
    Size: 8201856 blocks

d71: Submirror of d70
    State: Needs maintenance 
    Invoke: metaonline d70 d71
    Size: 8201856 blocks
    Stripe 0:
        Device     Start Block  Dbase State        Hot Spare
        c1t0d0s4          0     No    Okay         


d72: Submirror of d70
    State: Okay         
    Size: 8201856 blocks
    Stripe 0:
        Device     Start Block  Dbase State        Hot Spare
        c1t1d0s4          0     No    Okay


Last edited by reborg; 02-25-2007 at 01:53 PM..
# 5  
Heck, it looks like your mirrors are simply offline. Each paragraph tells you the problem and what you need to do to bring them back on line. In this case, just run the individual metaonline commands as listed.

As to why, per the man page (man metaonline), one good reason would be to run a full backup of the system. In your backup script you'd bring the disks offline, run the backup on the down disks, and then bring them back online. They'd have to resync for your dual mirror system which might take a while depending on sizes.

If there was a problem with the backups, perhaps the disks wouldn't have been brought back online. I'd have to poke around in the scheduled scripts to see if something's bringing them down for some reason.

Carl
# 6  
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