What is the difference between Zoning and LUN masking?
Zoning:
Zoning controls access from one node to another. Zoning lets you isolate a single server to a group of storage devices or a single storage device, or associate a grouping of multiple servers with one or more storage devices, as might be needed in a server cluster deployment.
Zoning is implemented at the hardware level (by using the capabilities of Fibre Channel switches) and can usually be done either on a port basis (hard zoning) or on a World-Wide Name (WWN) basis (soft zoning).
Lun Masking:
LUN masking, performed at the storage controller level, allows you to define relationships between LUNs and individual servers
RAID 0 (Striping): This setup increases hard-drive performance by splitting, or striping, data across two drives. RAID 0 provides no data protection
RAID 1 (Mirroring): A RAID 1 setup protects data from drive failure by simultaneously writing the same data to two hard drives.
RAID 5 (Distributed Parity): It requires a minimum of three hard drives. Instead of using an entire hard drive as a backup, RAID 5 spreads redundancy information--called parity bits--across all of the array's drives. When one of the drives in a RAID 5 array fails, the data content of that failed drive is reconstructed using the parity bits on the surviving drives and written to a new, replacement drive.
RAID 1+0, 0+1, 10: Some adapters combine (referred to as nesting) RAID 0 and RAID 1 to provide both data redundancy and increased disk performance. This works by either striping data across a pair of drives then mirroring (0+1) them with another pair, or striping data across two mirrored pairs (1+0, aka 10). RAID 0+1, 1+0, and 10 require a minimum of four hard drives.
Zoning:
Zoning controls access from one node to another. Zoning lets you isolate a single server to a group of storage devices or a single storage device, or associate a grouping of multiple servers with one or more storage devices, as might be needed in a server cluster deployment.
Zoning is implemented at the hardware level (by using the capabilities of Fibre Channel switches) and can usually be done either on a port basis (hard zoning) or on a World-Wide Name (WWN) basis (soft zoning).
Lun Masking:
LUN masking, performed at the storage controller level, allows you to define relationships between LUNs and individual servers
RAID 0 (Striping): This setup increases hard-drive performance by splitting, or striping, data across two drives. RAID 0 provides no data protection
RAID 1 (Mirroring): A RAID 1 setup protects data from drive failure by simultaneously writing the same data to two hard drives.
RAID 5 (Distributed Parity): It requires a minimum of three hard drives. Instead of using an entire hard drive as a backup, RAID 5 spreads redundancy information--called parity bits--across all of the array's drives. When one of the drives in a RAID 5 array fails, the data content of that failed drive is reconstructed using the parity bits on the surviving drives and written to a new, replacement drive.
RAID 1+0, 0+1, 10: Some adapters combine (referred to as nesting) RAID 0 and RAID 1 to provide both data redundancy and increased disk performance. This works by either striping data across a pair of drives then mirroring (0+1) them with another pair, or striping data across two mirrored pairs (1+0, aka 10). RAID 0+1, 1+0, and 10 require a minimum of four hard drives.
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