Hd6 is in stale condition


 
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Operating Systems AIX Hd6 is in stale condition
# 1  
Old 08-11-2014
Hd6 is in stale condition

Hi friends,

the paging lv hd6 is in stale condition

Code:
hd6                 paging     48    96    2    open/stale    N/A

And i'am getting the following alerts in the server
Code:
333BD283   0811044814 U S LVDD           Bad block detected with no relocation al
333BD283   0811041114 U S LVDD           Bad block detected with no relocation al
333BD283   0811040614 U S LVDD           Bad block detected with no relocation al
03913B94   0810230414 U H LVDD           HARDWARE DISK BLOCK RELOCATION ACHIEVED
E86653C3   0810230414 P H LVDD           I/O ERROR DETECTED BY LVM
49A83216   0810230414 T H hdisk1         DISK OPERATION ERROR
03913B94   0810200614 U H LVDD           HARDWARE DISK BLOCK RELOCATION ACHIEVED
E86653C3   0810200614 P H LVDD           I/O ERROR DETECTED BY LVM
49A83216   0810200614 T H hdisk1         DISK OPERATION ERROR

Also when i'am doing syncvg -v rootvg i'am getting the below error,

Code:
0516-1296 lresynclv: Unable to completely resynchronize volume.
        The logical volume has bad-block relocation policy turned off.
        This may have caused the command to fail.
0516-934 /usr/sbin/syncvg: Unable to synchronize logical volume hd6.


kindly suggest what i have to do to bring the hd6 to syncronized state.

Code:
sysdumpdev -l
primary              /dev/sysdmp_a
secondary            /dev/sysdmp_b
copy directory       /var/adm/ras
forced copy flag     TRUE
always allow dump    FALSE
dump compression     ON

The rootvg is in mirrored state.

Last edited by Don Cragun; 08-11-2014 at 01:27 AM.. Reason: Add CODE and ICODE tags.
# 2  
Old 08-11-2014
Quote:
Originally Posted by Mohamed Thamim
the paging lv hd6 is in stale condition
Just for the record: "stale" means you have two (or more) mirror copies of a logical volume of which one (or more) are missing.

Code:
333BD283   0811044814 U S LVDD           Bad block detected with no relocation al
333BD283   0811041114 U S LVDD           Bad block detected with no relocation al
333BD283   0811040614 U S LVDD           Bad block detected with no relocation al
03913B94   0810230414 U H LVDD           HARDWARE DISK BLOCK RELOCATION ACHIEVED

Now, this is most probably the cause of your problems: when a physical disk is being formatted several blocks are set aside as spare. Should one allocated disk block become unreliable for some reason (the magnetic coating becomes defective somehow), then the driver automatically marks this block as "bad" and uses one of the set aside spare blocks instead. The data from the old block are transferred to the new location if this is still possible. This is called "bad block relocation".

Code:
0516-1296 lresynclv: Unable to completely resynchronize volume.
        The logical volume has bad-block relocation policy turned off.
        This may have caused the command to fail.
0516-934 /usr/sbin/syncvg: Unable to synchronize logical volume hd6.

hd6 is your swap and swap is basically memory. You do not want to tinker with the memory while the system is running, so there is a rationale behind this. But because bad block relocation is turned off, the system in turn cannot reloctae the block and therefore you have a stale LV.

My suggestion is to remove the stale mirror from the LV and then remirror it. Once the bad block is not any more part of an LV it will simply be marked as bad and not be used again should the surrounding space be reallocated to another LV.

I hope this helps.

bakunin
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