Copyright@1993~2013 Advanced Computer & Network Corp. All Rights Reserved.
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SAS 712 U Series User Manual
712U 10G / 712U 10G+ (2 x 10GbE + 2 x GbE ports):
RAID Concepts
RAID is the abbreviation of Redundant Array of Independent Disks. The basic idea of RAID is to
combine multiple drives together to form one large logical drive. This RAID drive obtains
performance, capacity and reliability than a single drive. The operating system detects the RAID
drive as a single storage device.
RAID Levels
There are various RAID levels with different degrees of data protection, data availability, and
performance. A description of supported RAID levels follow:
Type
Description
Min. No. of Drives
RAID 0
Disk striping.
1
RAID 1
Disk mirroring over two disks.
2
RAID 5
Striping with interspersed parity over the member disks.
3
RAID 6
2-dimensional parity protection over the member disks.
4
RAID 50
Striping over the member RAID 5 volumes.
6
RAID 60
Striping over the member RAID 6 volumes.
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NAS Concepts
NAS (Network-Attached Storage) is file-level computer data storage connected to a computer
network providing data access to heterogeneous clients. NAS uses file-based protocols such as NFS
(popular on UNIX systems), SMB/CIFS (Server Message Block/Common Internet File System) (used
with MS Windows systems), or AFP (used with Apple Macintosh computers). NAS units rarely limit
clients to a single protocol.
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Summary of Contents for SAS 712U
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