SVM metastat -- needs maintenance Post: 97104

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Operating Systems Solaris SVM metastat -- needs maintenance Post 97104 by pressy on Thursday 26th of January 2006 10:57:19 AM

01-26-2006

Registered User

just try the command metasync(1M)....

This may be caused by the "metasync -r" command not getting executed when the system boots, or if the system boots up only to single-user mode.

This metasync command is normally executed in one of the startup scripts run at boot time.

For Online: DiskSuite[TM] 1.0, the metasync command is located in the /etc/rc.local script. This entry is placed in that file by the metarc command.

For Solstice DiskSuite versions between 3.x and 4.2, inclusive, the metasync command is located in the /etc/rc2.d/S95SUNWmd.sync file.

For Solstice DiskSuite version 4.2.1 and above, the metasync command is located in the file /etc/rc2.d/S95lvm.sync.

In all cases, because this script is not run until the system transitions into run state 3 (multi-user mode), it is to be expected to have both submirrors in a "Needs maintenance" state until the command is run. I/O to these metadevices works just fine while in this state, so there is no need to worry.

if that doesn't help, you be in the situation discribed in bug 82642

When trying to run the metasync command, the c1t0d0s0 device reported errors in /var/adm/messages:

Sep 15 09:11:17 bobbob scsi: WARNING: /pci@8,600000/SUNW,qlc@2/fp@0,0/ssd@w2100002037f396c9,0 (ssd1):
Sep 15 09:11:17 bobbob Error for Command: read(10) Error Level: Retryable
Sep 15 09:11:17 bobbob scsi: Requested Block: 4057844 Error Block: 4057969
Sep 15 09:11:17 bobbob scsi: Vendor: SEAGATE Serial Number: 0107D1MVCF
Sep 15 09:11:17 bobbob scsi: Sense Key: Media Error
Sep 15 09:11:17 bobbob scsi: ASC: 0x11 (unrecovered read error), ASCQ: 0x0, FRU: 0xe4
Sep 15 09:11:19 bobbob scsi: WARNING: /pci@8,600000/SUNW,qlc@2/fp@0,0/ssd@w2100002037f396c9,0 (ssd1):
Sep 15 09:11:19 bobbob Error for Command: read(10) Error Level: Retryable
Sep 15 09:11:19 bobbob scsi: Requested Block: 4057844 Error Block: 4057969
Sep 15 09:11:19 bobbob scsi: Vendor: SEAGATE Serial Number: 0107D1MVCF
Sep 15 09:11:19 bobbob scsi: Sense Key: Media Error
Sep 15 09:11:19 bobbob scsi: ASC: 0x11 (unrecovered read error), ASCQ: 0x0, FRU: 0xe4

In this case, the same block is being reported as having problems.

Resolution:

The bad block can be fixed by running format --> analyze --> read on the c1t0d0 disk.

# format
Searching for disks...done

AVAILABLE DISK SELECTIONS:
0. c1t0d0 <SUN36G cyl 24620 alt 2 hd 27 sec 107>
/pci@8,600000/SUNW,qlc@2/fp@0,0/ssd@w2100002037f396c9,0
1. c1t1d0 <SUN36G cyl 24620 alt 2 hd 27 sec 107>
/pci@8,600000/SUNW,qlc@2/fp@0,0/ssd@w2100002037f8c663,0
Specify disk (enter its number): 0
selecting c1t0d0
format> analyze
analyze> read
Ready to analyze (won't harm SunOS). This takes a long time,
but is interruptable with CTRL-C. Continue? y

pass 0
Medium error during read: block 4057969 (0x3deb71) (1404/16/101)
ASC: 0x11 ASCQ: 0x0
Sep 15 09:26:59 bobbob scsi: WARNING: /pci@8,600000/SUNW,qlc@2/fp@0,0/ssd@w2100002037f396c9,0 (ssd1):
Sep 15 09:26:59 bobbob Error for Command: read(10) Error Level: Retryable
Sep 15 09:26:59 bobbob scsi: Requested Block: 4057969 Error Block: 4057969
Sep 15 09:26:59 bobbob scsi: Vendor: SEAGATE Serial Number: 0107D1MVCF
Sep 15 09:26:59 bobbob scsi: Sense Key: Media Error
Sep 15 09:26:59 bobbob scsi: ASC: 0x11 (unrecovered read error), ASCQ: 0x0, FRU: 0xe4
Repairing hard error on 4057969 (1404/16/101)...ok.

24619/26/53

pass 1
24619/26/53

Total of 1 defective blocks repaired.

Now running metasync completes.

# metasync d10
# metastat d10
d10: Mirror
Submirror 0: d0
State: Needs maintenance
Submirror 1: d1
State: Okay
Pass: 1
Read option: roundrobin (default)
Write option: parallel (default)
Size: 69078879 blocks

d0: Submirror of d10
State: Needs maintenance
Invoke: after replacing "Maintenance" components:
metareplace d10 c1t0d0s0 <new device>
Size: 69078879 blocks
Stripe 0:
Device Start Block Dbase State Hot Spare
c1t0d0s0 0 No Last Erred

d1: Submirror of d10
State: Okay
Size: 69078879 blocks
Stripe 0:
Device Start Block Dbase State Hot Spare
c1t1d0s0 0 No Okay

And then, metareplace can be executed.

# metareplace -e d10 c1t0d0s0
# metastat d10
d10: Mirror
Submirror 0: d0
State: Okay
Submirror 1: d1
State: Okay
Pass: 1
Read option: roundrobin (default)
Write option: parallel (default)
Size: 69078879 blocks

d0: Submirror of d10
State: Okay
Size: 69078879 blocks
Stripe 0:
Device Start Block Dbase State Hot Spare
c1t0d0s0 0 No Okay

d1: Submirror of d10
State: Okay
Size: 69078879 blocks
Stripe 0:
Device Start Block Dbase State Hot Spare
c1t1d0s0 0 No Okay

regards pressy

pressy

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