Done it !! Had to use Fdisk. Once I had removed the partition I then tried to add the storage again and this time it took !! At last !!! Very happy :-)
Thanks for your help.
/dev/disks # fdisk -u /vmfs/devices/disks/mpx.vmhba1:C0:T2:L0
***
*** The fdisk command is deprecated: fdisk does not handle GPT partitions. Please use partedUtil
***
The number of cylinders for this disk is set to 36468.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
(e.g., DOS FDISK, OS/2 FDISK)
Command (m for help): d
Partition number (1-4): 1
Command (m for help): d
Selected partition 2
Command (m for help): 2
2: unknown command
Command Action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition
l list known partition types
n add a new partition
o create a new empty DOS partition table
p print the partition table
q quit without saving changes
s create a new empty Sun disklabel
t change a partition's system id
u change display/entry units
v verify the partition table
w write table to disk and exit
x extra functionality (experts only)
Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table
/dev/disks # fdisk -lu
***
*** The fdisk command is deprecated: fdisk does not handle GPT partitions. Please use partedUtil
***
Found valid GPT with protective MBR; using GPT
Disk /dev/disks/mpx.vmhba32:C0:T0:L0: 15384576 sectors, 14.6M
Logical sector size: 512
Disk identifier (GUID): b2b8f66f-3dc1-4180-9622-f15de631db88
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 15384542
Number Start (sector) End (sector) Size Code Name
1 64 8191 8128 0700
5 8224 520191 499K 0700
6 520224 1032191 499K 0700
7 1032224 1257471 219K 0700
8 1257504 1843199 571K 0700
Disk /dev/disks/mpx.vmhba1:C0:T2:L0: 299.9 GB, 299966445568 bytes
255 heads, 63 sectors/track, 36468 cylinders, total 585871964 sectors
Units = sectors of 1 * 512 = 512 bytes
Device Boot Start End Blocks Id System
Found valid GPT with protective MBR; using GPT
Disk /dev/disks/mpx.vmhba1:C0:T1:L0: 71065440 sectors, 67.7M
Logical sector size: 512
Disk identifier (GUID): 61e9575b-efa5-462c-afed-9f6367755dfb
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 71065406
Number Start (sector) End (sector) Size Code Name
1 2048 71063551 67.7M 0700
Found valid GPT with protective MBR; using GPT
Disk /dev/disks/mpx.vmhba1:C0:T0:L0: 429925920 sectors, 410M
Logical sector size: 512
Disk identifier (GUID): 2f7deffd-5579-4684-8f2e-625aeb688044
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 429925886
Number Start (sector) End (sector) Size Code Name
1 2048 429924351 410M 0700