Almost all high-end desktop motherboards now ship with the ability to run multiple hard drives in various RAID formats. Usually, it's the south bridge, or I/O controller hub that enables this capability, though some boards add a third party storage controller for added flexibility.
Intel's latest IO controller hub, ICH10R, supports a variety of RAID formats, including RAID 0 (something of a misnomer), RAID 1, RAID 5, and RAID 10. Both ICH10R and ICH9R support volumes as large as 256 terabytes, as long as you have an updated BIOS and the most recent Intel matrix storage driver.
We're not going to get too heavily into which format is suitable for you. You know your applications best. What we're doing today is taking a look at the performance on the multiple RAID formats available with ICH10R. We'll also take a look at some different stripe sizes on RAID 0.
RAID 0, which has no redundancy, gangs multiple drives by striping reads and writes across them. RAID 0 is mostly for increasing capacity and performance. RAID 1 is pure redundancy—two drives combine to give you the capacity of one drive in one logical volume, but with data written identically onto both physical drives. RAID 5 gives you more capacity than RAID 1, with a reasonable level of data security, by creating a parity stripe that allows reconstruction of the data should one drive go down. Finally, RAID 10 is RAID 0 and RAID 1 combined, to yield both increased performance as well as data redundancy.
Note that we're looking at RAID for desktop systems; while there's some useful information here for people looking to capture or edit video, these aren't good tests for understanding server performance. With that thought in mind, let's look at our test system.
SOURCE:http://www.extremetech.com/article2/0,2845,2334984,00.asp
0 comments:
Post a Comment