ASM DISK creation failed

Marking disk "ASMDATA26" as an ASM disk:                   [FAILED]

I tried to create ASM disk creation failed when you try to create ASM disk,

Kindly check the created Lun size ro correct or not.


[root@vsnlmmdb02 ~]# fdisk -l /dev/mapper/mpath_oradata26

Disk /dev/mapper/mpath_oradata26: 644.2 GB, 644245094400 bytes
255 heads, 63 sectors/track, 78325 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000

it is showing size is increasing .

check output file cat /var/log/oracleasm output

Disk "ASMDATA24" does not exist or is not instantiated
Writing disk header: oracleasm-write-label: Unable to clear device "/dev/mapper/mpath_oradata24": Input/output error
failed
Unable to label device "/dev/mapper/mpath_oradata24"
Disk "ASMDATA25" does not exist or is not instantiated
Writing disk header: done
Instantiating disk: done
Disk "ASMDATA26" does not exist or is not instantiated
Writing disk header: oracleasm-write-label: Unable to clear device "/dev/mapper/mpath_oradata26": Input/output error
failed
Unable to label device "/dev/mapper/mpath_oradata26"
Disk "ASMDATA24" does not exist or is not instantiated
Writing disk header: oracleasm-write-label: Unable to clear device "/dev/mapper/mpath_oradata24": Input/output error
failed
Unable to label device "/dev/mapper/mpath_oradata24"

and requested to system team to remove and create properly.