In my understanding LUN security starts in step by step
1) In Storage Array
2) In Fabric Switch Zoning
3) Using a Host software
LUN Security in a Storage Array:
Lun (Logical Unit Number) Security starts in Storage array through
1) Registering HBA in a storage array.
2) In Raid Group (for Data security)
3) Lun Masking:
Registering HBA in a Storage Array: A SCSI cable or a fiber channel cable is connected to the storage array front end port directly from the HBA card or through the Fabric switch. We can register a HBA in a manual way or storage array host agent will automatically identify the HBA WWN number. For every storage array there will be fail over mode to avoid single path ...view middle of the document...
Lun will be created across the disks. There will be no security for the data. If a disk fails then the entire data will be lost from array. The only main advantage of this is performance will be more.
RAID 1: RAID 1 is worked by mirroring process. If you select RAID 1 type while creating a RAID group (Example RAID Group 0) then 2 disks will be reserved for that raid group. When we create a lun from RAID Group 0 the incoming written data will be written one disk and the same data will be copied (mirrored) over to the second disk. When host requests to read a data then data will be read from disk 1. If a harm happened to disk 1 then automatically disk 2 comes into picture. Replacing disk1 automatically hot spare disk will work as disk2 until the disk is replaced.
RAID 3: RAID 3 worked on a dedicated parity. Lun will be written across the disks and the other disk will reserve for parity. If a disk goes down then the replaced disk will be rebuild using parity.
RAID 5: It is same as RAID 3 but in this parity is distributed across the disks instead of a fixed disk. It support one dual disk failure.
RAID 6: It is same as RAID 5 but in this it will support dual parity and will with stand up two two disk failures.
Lun Masking: Lun masking in a storage system like clariion is done by using a storage group. In process of mapping a lun to server HBA firstly a storage group needs to be created. Required host HBA nodes and luns are added to the storage group. The main role of a storage group is the hosts which are in that particular storage group can only see the luns in same storage group. They can’t see or access other luns. Another main important aspect is one lun can be part of many number of storage groups but a HBA node cannot be part of more than one storage group. Server team will identify the lun by...