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What should I do with this metastat result? metareplace everything?

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Special Forums Hardware Filesystems, Disks and Memory What should I do with this metastat result? metareplace everything?
# 1  
Old 12-11-2008
What should I do with this metastat result? metareplace everything?
I have to rescue the volumes in a soloris 7 machine. The metastat returns the following result:


Quote:
d0: Mirror
Submirror 0: d10
State: Needs maintenance
Submirror 1: d20
State: Okay
Pass: 1
Read option: roundrobin (default)
Write option: parallel (default)
Size: 4198392 blocks

d10: Submirror of d0
State: Needs maintenance
Invoke: metareplace d0 c0t0d0s0 <new device>
Size: 4198392 blocks
Stripe 0:
Device Start Block Dbase State Hot Spare
c0t0d0s0 0 No Maintenance

d20: Submirror of d0
State: Okay
Size: 4198392 blocks
Stripe 0:
Device Start Block Dbase State Hot Spare
c0t1d0s0 0 No Okay

d1: Mirror
Submirror 0: d11
State: Needs maintenance
Submirror 1: d21
State: Okay
Pass: 1
Read option: roundrobin (default)
Write option: parallel (default)
Size: 2101552 blocks

d11: Submirror of d1
State: Needs maintenance
Invoke: metareplace d1 c0t0d0s1 <new device>
Size: 2101552 blocks
Stripe 0:
Device Start Block Dbase State Hot Spare
c0t0d0s1 0 No Maintenance

d21: Submirror of d1
State: Okay
Size: 2101552 blocks
Stripe 0:
Device Start Block Dbase State Hot Spare
c0t1d0s1 0 No Okay

d6: Mirror
Submirror 0: d16
State: Needs maintenance
Pass: 1
Read option: roundrobin (default)
Write option: parallel (default)
Size: 12288896 blocks

d16: Submirror of d6
State: Needs maintenance
Invoke: after replacing "Maintenance" components:
metareplace d6 c0t0d0s6 <new device>
Size: 12288896 blocks
Stripe 0:
Device Start Block Dbase State Hot Spare
c0t0d0s6 0 No Last Erred

d7: Mirror
Submirror 0: d17
State: Needs maintenance
Submirror 1: d27
State: Okay
Pass: 1
Read option: roundrobin (default)
Write option: parallel (default)
Size: 16765296 blocks

d17: Submirror of d7
State: Needs maintenance
Invoke: metareplace d7 c0t0d0s7 <new device>
Size: 16765296 blocks
Stripe 0:
Device Start Block Dbase State Hot Spare
c0t0d0s7 0 No Maintenance

d27: Submirror of d7
State: Okay
Size: 16765296 blocks
Stripe 0:
Device Start Block Dbase State Hot Spare
c0t1d0s7 0 No Okay

d26: Concat/Stripe
Size: 12288896 blocks
Stripe 0:
Device Start Block Dbase
c0t1d0s6 0 No
d6 is dying with iostat -nE returns Harderror 3, Transports error 9

Can some offer me some help? Thank you very much.
Last edited by nickychung; 12-11-2008 at 12:28 AM..
# 2  
Old 12-11-2008
Do you know what triggered these problems in the first place? It looks like c0t0d0 had some kind of failure... is it working again now?

Try using the non-destructive read tests in format to see if you can read the entire c0t0d0 device.

If it seems to be working okay again, you should be able to use metareplace -e d0 c0t0d0s0, for example, to replace the disk with itself (and repeat for the other mirrors of course). Otherwise you may need to replace that disk first... probably a good idea to have a spare disk handy anyway if it is indeed beginning to fail.
# 3  
Old 12-16-2008
Keep an eye on the hard errors. If these increase, you'll most probably need to replace the disk.

Check out the format command and see if you can write a label to your disk (you won't lose any data). If this fails, it's a good indicator that you've got a disk which is failing.

If hard errors are not increasing, you could just run the metareplace command, using the existing slice and see if this brings the mirrors back online (I have run into this issue before) e.g. metareplace d0 c0t0d0s0.
# 4  
Old 12-16-2008
There is no increase of hard error.
Format can not recognize c0t0d0.

And, metareplace -e d0 c0t0d0s0 returns I/O errors.

Is it possible to bring mirror d0 back online with c0t1d0s0?

metastat -p returns

Quote:
d0 -m d10 d20 1
d10 1 1 c0t0d0s0
d20 1 1 c0t1d0s0
d1 -m d11 d21 1
d11 1 1 c0t0d0s1
d21 1 1 c0t1d0s1
d6 -m d16 1
d16 1 1 c0t0d0s6
d7 -m d17 d27 1
d17 1 1 c0t0d0s7
d27 1 1 c0t1d0s7
d26 1 1 c0t1d0s6
# 5  
Old 12-16-2008
Just because it "needs maintenance" doesn't mean it is offline. If c0t1d0s0 is still working fine, then you should be able to access d0 fine... is it not working?
# 6  
Old 12-17-2008
Yes, I am still able to access d0 but not d6. d0 is online. d6 is dead.

But metareplace just can't help me to fix the "needs maintenance" problem.

iostat -nE returns:

Quote:
c0t0d0 Soft Errors: 0 Hard Errors: 3 Transport Errors: 9
Vendor: SEAGATE Product: ST318203LSUN18G Revision: 034A Serial No: LRD9164600001037
Size: 18.11GB <18110967808 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 3 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c0t1d0 Soft Errors: 0 Hard Errors: 4 Transport Errors: 2
Vendor: FUJITSU Product: MAG3182L SUN18G Revision: 1111 Serial No: 02542399
Size: 18.11GB <18110967808 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 4 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c0t6d0 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: TOSHIBA Product: XM6201TASUN32XCD Revision: 1103 Serial No: 12/12/97
Size: 18446744073.71GB <-1 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
# 7  
Old 12-17-2008
That makes sense because for some reason d26 is no longer associated with d6. I can't advise you a safe method to reattach it to d6 because I don't have access to a Solaris system using SVM/DiskSuite any more.

If the disk is genuinely faulty (which it appears to be judging by the number of hard errors and the fact that metareplace fails) then you should physically replace it before attempting to rejoin it to the mirrors.

If you need to recover the data from d26 one option would be to simply mount that device instead of d6.
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