format the multipath raw partition and use for oracle asm without reboot the machine

Node-2
# fdisk /dev/mapper/myraw
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel. Changes will remain in memory only,
until you decide to write them. After that, of course, the previous
content won’t be recoverable.

The number of cylinders for this disk is set to 78325.
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)
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)

Command (m for help): u
Changing display/entry units to sectors

Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First sector (63-1258291199, default 63): 2048
Last sector or +size or +sizeM or +sizeK (2048-1258291199, default 1258291199):
Using default value 1258291199

Command (m for help): p

Disk /dev/mapper/myraw: 644.2 GB, 644245094400 bytes
255 heads, 63 sectors/track, 78325 cylinders, total 1258291200 sectors
Units = sectors of 1 * 512 = 512 bytes

Device Boot Start End Blocks Id System
/dev/mapper/myraw1 2048 1258291199 629144576 83 Linux

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.

WARNING: Re-reading the partition table failed with error 22: Invalid argument.
The kernel still uses the old table.
The new table will be used at the next reboot.
Syncing disks.
#

#/sbin/partprobe /dev/mapper/myraw

Node-1
#/sbin/partprobe /dev/mapper/myraw

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