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mount I/O error

 
Fauziah Mahdan
Super Advisor

mount I/O error

Hi all,
Need help regarding mount issue.
Last few weeks I do online extension without going to single user mode.
I extend for my vg03 logical volume.
All the extension are sucess but I only realise recently week when I run bdf another directory in diff vg was given I/O error.

bdf: /oraclecd: I/O error

check from fstab
/dev/vg_oracle/lvol2 /oraclecd vxfs rw,suid,nolargefiles,delaylog,datainlog 0 2

I try to mount the space but the same error still appear.

Pls advice
7 REPLIES 7
Asif Sharif
Honored Contributor

Re: mount I/O error

Hi Mahdan,
It seems you have a media error on the disk in the area that the /oraclecd filesystem exists.

You can try to unmount it & run fsck on it also send the output of the below commands.

#ioscan -funC disk
#strings /etc/lvmtab

Is there any message in the syslog ?

Regards,
Asif Sharif
Regards,
Asif Sharif
Fauziah Mahdan
Super Advisor

Re: mount I/O error

ioscan -funC disk
Class I H/W Path Driver S/W State H/W Type Description
===========================================================================
disk 0 0/0/1/1.0.0 sdisk CLAIMED DEVICE HP 18.2GMAN3184MC
/dev/dsk/c1t0d0 /dev/rdsk/c1t0d0
disk 1 0/0/1/1.2.0 sdisk CLAIMED DEVICE FUJITSU MAJ3182MC
/dev/dsk/c1t2d0 /dev/rdsk/c1t2d0
disk 2 0/0/2/0.0.0 sdisk CLAIMED DEVICE HP 18.2GMAN3184MC
/dev/dsk/c2t0d0 /dev/rdsk/c2t0d0
disk 3 0/0/2/0.2.0 sdisk CLAIMED DEVICE HP 18.2GMAP3367NC#HJ
/dev/dsk/c2t2d0 /dev/rdsk/c2t2d0
disk 4 0/0/2/1.2.0 sdisk CLAIMED DEVICE HP DVD-ROM 305
/dev/dsk/c3t2d0 /dev/rdsk/c3t2d0
disk 7 0/8/0/0.2.16.0.0.0.0 sdisk CLAIMED DEVICE HP A6188A
/dev/dsk/c10t0d0 /dev/rdsk/c10t0d0
disk 13 0/8/0/0.2.16.0.0.0.1 sdisk CLAIMED DEVICE HP A6188A
/dev/dsk/c10t0d1 /dev/rdsk/c10t0d1
disk 14 0/8/0/0.2.16.0.0.0.2 sdisk CLAIMED DEVICE HP A6188A
/dev/dsk/c10t0d2 /dev/rdsk/c10t0d2
disk 15 0/8/0/0.2.16.0.0.0.3 sdisk CLAIMED DEVICE HP A6188A
/dev/dsk/c10t0d3 /dev/rdsk/c10t0d3
disk 25 0/8/0/0.2.16.0.0.0.4 sdisk CLAIMED DEVICE HP A6188A
/dev/dsk/c10t0d4 /dev/rdsk/c10t0d4
disk 8 0/12/0/0.1.16.0.0.0.0 sdisk CLAIMED DEVICE HP A6188A
/dev/dsk/c9t0d0 /dev/rdsk/c9t0d0
disk 16 0/12/0/0.1.16.0.0.0.1 sdisk CLAIMED DEVICE HP A6188A
/dev/dsk/c9t0d1 /dev/rdsk/c9t0d1
disk 17 0/12/0/0.1.16.0.0.0.2 sdisk CLAIMED DEVICE HP A6188A
/dev/dsk/c9t0d2 /dev/rdsk/c9t0d2
disk 18 0/12/0/0.1.16.0.0.0.3 sdisk CLAIMED DEVICE HP A6188A
/dev/dsk/c9t0d3 /dev/rdsk/c9t0d3
disk 26 0/12/0/0.1.16.0.0.0.4 sdisk CLAIMED DEVICE HP A6188A
/dev/dsk/c9t0d4 /dev/rdsk/c9t0d4

# strings /etc/lvmtab
/dev/vg00
/dev/dsk/c1t2d0
/dev/dsk/c2t2d0
/dev/vg01
/dev/dsk/c9t0d1
/dev/dsk/c10t0d1
/dev/vg02
/dev/dsk/c9t0d2
/dev/dsk/c10t0d2
/dev/vg03
/dev/dsk/c9t0d3
/dev/dsk/c10t0d3
/dev/vg_cl
/dev/dsk/c9t0d4
/dev/dsk/c10t0d4
/dev/vg_oracle
/dev/dsk/c2t0d0
/dev/dsk/c1t0d0


from syslog
latest msg

Jun 10 08:21:58 cgcdb1 vmunix: LVM: VG 64 0x080000: PVLink 31 0x020000 Failed! The PV is not accessible.
Jun 10 08:21:58 cgcdb1 vmunix: LVM: VG 64 0x080000: PVLink 31 0x020000 Recovered.


pls advice
Asif Sharif
Honored Contributor

Re: mount I/O error

Hi Mahdan,

your disk c2t0d0 or c1t0d0 failed and recovered. You can do "ll /dev/*/group" and see which VG has group with that number.

Check disk with stm or dd commands.

A dd test would tell you if disk is OK or not.

dd if=/dev/rdsk/cxtxdx of=/dev/vnull bs=4k

Regards,
Asif Sharif

Regards,
Asif Sharif
Devender Khatana
Honored Contributor

Re: mount I/O error

Hi,

The error in syslog clearly indicates this is a disk failure. Just confirm that the disk it is mentioning belongs to the failed file system only and the message is not because of the excessive I/O on some other disk.

Even after failure of the disk the I/O error will be there if it is not mirrored.
If not mirroed recovery and dd will not do much, get the disk replaced, create file system and get it restored.

#lvdisplay -v /dev/vg_oracle/lvol2

lvdisplay will give you the number of PEs in stale state which are cauisng this.

HTH,
Devender
Impossible itself mentions "I m possible"
Fauziah Mahdan
Super Advisor

Re: mount I/O error

I have checked and run the command looks like everything normal.
cgcdb1:/# ll /dev/vg_oracle
total 0
crw-rw-rw- 1 root sys 64 0x080000 Jul 8 2002 group
br--r----- 1 root sys 64 0x080001 Jul 8 2002 lvol1
brw-r----- 1 root sys 64 0x080002 Sep 8 2006 lvol2
br--r----- 1 root sys 64 0x080003 Aug 21 2002 lvol3
cr--r----- 1 root sys 64 0x080001 Jul 8 2002 rlvol1
crw-r----- 1 root sys 64 0x080002 Sep 8 2006 rlvol2
cr--r----- 1 root sys 64 0x080003 Aug 21 2002 rlvol3


cgcdb1:/# lvdisplay -v /dev/vg_oracle/lvol2
--- Logical volumes ---
LV Name /dev/vg_oracle/lvol2
VG Name /dev/vg_oracle
LV Permission read/write
LV Status available/syncd
Mirror copies 0
Consistency Recovery MWC
Schedule parallel
LV Size (Mbytes) 2048
Current LE 512
Allocated PE 512
Stripes 0
Stripe Size (Kbytes) 0
Bad block on
Allocation strict
IO Timeout (Seconds) default

--- Distribution of logical volume ---
PV Name LE on PV PE on PV
/dev/dsk/c2t0d0 512 512

--- Logical extents ---
LE PV1 PE1 Status 1
00000 /dev/dsk/c2t0d0 00500 current
00001 /dev/dsk/c2t0d0 00501 current
00002 /dev/dsk/c2t0d0 00502 current
00003 /dev/dsk/c2t0d0 00503 current
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00301 /dev/dsk/c2t0d0 00801 current
00302 /dev/dsk/c2t0d0 00802 current
00303 /dev/dsk/c2t0d0 00803 current
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00309 /dev/dsk/c2t0d0 00809 current
00310 /dev/dsk/c2t0d0 00810 current
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00320 /dev/dsk/c2t0d0 00820 current
00321 /dev/dsk/c2t0d0 00821 current
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00326 /dev/dsk/c2t0d0 00826 current
00327 /dev/dsk/c2t0d0 00827 current
00328 /dev/dsk/c2t0d0 00828 current
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00364 /dev/dsk/c2t0d0 00864 current
00365 /dev/dsk/c2t0d0 00865 current
00366 /dev/dsk/c2t0d0 00866 current
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00368 /dev/dsk/c2t0d0 00868 current
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00370 /dev/dsk/c2t0d0 00870 current
00371 /dev/dsk/c2t0d0 00871 current
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00373 /dev/dsk/c2t0d0 00873 current
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00426 /dev/dsk/c2t0d0 00926 current
00427 /dev/dsk/c2t0d0 00927 current
00428 /dev/dsk/c2t0d0 00928 current
00429 /dev/dsk/c2t0d0 00929 current
00430 /dev/dsk/c2t0d0 00930 current
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00480 /dev/dsk/c2t0d0 00980 current
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00490 /dev/dsk/c2t0d0 00990 current
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00495 /dev/dsk/c2t0d0 00995 current
00496 /dev/dsk/c2t0d0 00996 current
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00498 /dev/dsk/c2t0d0 00998 current
00499 /dev/dsk/c2t0d0 00999 current
00500 /dev/dsk/c2t0d0 03500 current
00501 /dev/dsk/c2t0d0 03501 current
00502 /dev/dsk/c2t0d0 03502 current
00503 /dev/dsk/c2t0d0 03503 current
00504 /dev/dsk/c2t0d0 03504 current
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00506 /dev/dsk/c2t0d0 03506 current
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00508 /dev/dsk/c2t0d0 03508 current
00509 /dev/dsk/c2t0d0 03509 current
00510 /dev/dsk/c2t0d0 03510 current
00511 /dev/dsk/c2t0d0 03511 current
Devender Khatana
Honored Contributor

Re: mount I/O error

Hi,

Something to check now is if the errors in syslog and dmesg are still scrolling and it is for the disk which belongs to this LVOL.

Just give the minor number of the disk device file /dev/dsk/c2t0d0.

"#ll /dev/dsk/c2t0d0" will provide this.

HTH,
Devender
Impossible itself mentions "I m possible"
Fauziah Mahdan
Super Advisor

Re: mount I/O error

ll /dev/dsk/c2t0d0
brw-r----- 1 bin sys 31 0x020000 May 16 2002 /dev/dsk/c2t0d0