Asus 1U Rackmount Barebone Server RS120-E3 (PA4) User Manual

Contents

6 - 26 - 26 - 26 - 26 - 2 C h a p t e r 6 : R A I D c o n f i g u r a t i o nC h a p t e r 6 : R A I D c o n f i g u r a t i o nC h a p t e r 6 : R A I D c o n f i g u r a t i o nC h a p t e r 6 : R A I D c o n f i g u r a t i o nC h a p t e r 6 : R A I D c o n f i g u r a t i o n6.1 Setting up RAIDThe Intel ® ICH7R Southbridge chip comes with the L S I L o g i c E m b e d d e dL S I L o g i c E m b e d d e dL S I L o g i c E m b e d d e dL S I L o g i c E m b e d d e dL S I L o g i c E m b e d d e dS A T A R A I D U t i l i t yS A T A R A I D U t i l i t yS A T A R A I D U t i l i t yS A T A R A I D U t i l i t yS A T A R A I D U t i l i t y and the I n t e lI n t e lI n t e lI n t e lI n t e l ®®®®® M a t r i x S t o r a g e M a n a g e rM a t r i x S t o r a g e M a n a g e rM a t r i x S t o r a g e M a n a g e rM a t r i x S t o r a g e M a n a g e rM a t r i x S t o r a g e M a n a g e r. Theseutilities support SATA hard disk drives and allow creation of RAID 0, RAID 1,RAID 0+1, or software RAID 5 (Intel ® Matrix Storage Manager only)configuration.6.1.16.1.16.1.16.1.16.1.1 RAID definitionsRAID definitionsRAID definitionsRAID definitionsRAID definitionsR A I D 0R A I D 0R A I D 0R A I D 0R A I D 0(Data striping) optimizes two identical hard disk drives to read andwrite data in parallel, interleaved stacks. Two hard disks perform the samework as a single drive but at a sustained data transfer rate, double that of asingle disk alone, thus improving data access and storage. Use of two newidentical hard disk drives is required for this setup.R A I D 1R A I D 1R A I D 1R A I D 1R A I D 1(Data mirroring) copies and maintains an identical image of data fromone drive to a second drive. If one drive fails, the disk array management softwaredirects all applications to the surviving drive as it contains a complete copy ofthe data in the other drive. This RAID configuration provides data protection andincreases fault tolerance to the entire system. Use two new drives or use anexisting drive and a new drive for this setup. The new drive must be of the samesize or larger than the existing drive.R A I D 5R A I D 5R A I D 5R A I D 5R A I D 5 stripes both data and parity information across three or more harddisk drives. Among the advantages of RAID 5 configuration include betterHDD performance, fault tolerance, and higher storage capacity. The RAID 5configuration is best suited for transaction processing, relational databaseapplications, enterprise resource planning, and other business systems. Usea minimum of three identical hard disk drives for this setup.R A I D 0 + 1 ( R A I D 1 0 )R A I D 0 + 1 ( R A I D 1 0 )R A I D 0 + 1 ( R A I D 1 0 )R A I D 0 + 1 ( R A I D 1 0 )R A I D 0 + 1 ( R A I D 1 0 ) isdata striping anddata mirroring combined withoutparity (redundancy data) having to be calculated and written. With the RAID0+1 configuration you get all the benefits of both RAID 0 and RAID 1configurations. Use four new hard disk drives or use an existing drive andthree new drives for this setup.J B O DJ B O DJ B O DJ B O DJ B O D(Spanning) stands for J u s t a B u n c h o f D i s k sJ u s t a B u n c h o f D i s k sJ u s t a B u n c h o f D i s k sJ u s t a B u n c h o f D i s k sJ u s t a B u n c h o f D i s k s and refers to harddisk drives that are not yet configured as a RAID set. This configuration storesthe same data redundantly on multiple disks that appear as a single disk onthe operating system. Spanning does not deliver any advantage over usingseparate disks independently and does not provide fault tolerance or otherRAID performance benefits.If you want to boot the system from a hard disk drive included in a createdRAID set, copy first the RAID driver from the support CD to a floppy diskbefore you install an operating system to the selected hard disk drive.Refer to Chapter 7 for details.