Hello, Mr. Shawn
now I implement and done almost everything ;
1- I configured the HPE MSA Array to 2 LUNs: 9TB for LUN 1 and 12TB for LUN 2.
2- I mapped the LUNs to all 2 servers connected to SAN directly through HBA fiber connection in DUAL Path Mode.
3- I scanned the fiber connection hosts on the servers and Linux Detect The LUNs with no problems.
4- I configured the DM-Multipath for Linux and I've got 2 Paths for the LUNs (/dev/mapper/mpathb) and (/dev/mapper/mpathc).
until now everything is fine ok, what I do next is :
- from the first server, I directly make a filesystem on each LUN without making any partitions by formatting the LUN into ext4 file system ( # mkfs.ext4 /dev/mapper/mpathb) , ( # mkfs.ext4 /dev/mapper/mpathc) . then I make a mounting point to each path and mount them to it. everything working fine for me and I try to copy data to the LUNs and the data copied without problems.
is this OK, or I've done any mistake here ?!!! by not creating partitions? (it is backup storage only)
then I moved to the second server and scan Fiber Connection and applying the Multipath and added the same LUNs to mounting points , also the server here detected the LUNs and added them properly and can write data on them.
the main question here is: when I copied data from any server to the detected LUNs and go to the other server I didn't find anything !!!! is this OK that every server sees its own data only in the same LUN ???
how do the SAN array deal with data from each server ? or I have to partition LUNs again after Multipath ?
any help would;d be appreciated.