does performance effect after disk shating using same iscsi bus?

Hello Friends

I want to know that while writing on the same raw disk by different vm's at the same time using shared iscsi effects the performance.

Which one will give is better performace:

option 1:

let assume a 500GB LUN comming from storage as FC raw disk to the server mounted to Linux VM that LUN is further divided into 5 LVM(OS level) of 100GB each, name of lvm are for example ( lvm1, lvm2, lvm3, lvm4 and lvm5). this raw disk is now shared with 4 others linux vm's using same iscsi bus.

After doing this all 5 VM's can see same raw disk and can see all 5 lvms.

now if

VM1 is writing on LVM1

VM2 is writing on LVM2

VM3 is writing on LVM3

VM4 is writing on LVM4

VM5 is writing on LVM5

all using same iscsi bus.

Option 2:

to have 5 different FC LUN's of 100GB each from storage and only one is mounted on one VM.

that means 

VM1 on LUN1

VM2 on LUN2

VM3 on LUN3

VM4 on LUN4

VM5 on LUN5

now according to you does the performace of writing effects in option 1 as compaired to option 2

thanks