I see people talking about RAIDing drives in many of these threads and I've heard the term before, but what is RAID? What does it do to your drives? Is it better than just using a drive by itself? Thanks!
(rād) Short for Redundant Array of Independent (or Inexpensive) Disks, a category of disk drives that employ two or more drives in combination for fault tolerance and performance. RAID disk drives are used frequently on servers but aren't generally necessary for personal computers. There are number of different RAID levels: Level 0 -- Striped Disk Array without Fault Tolerance: Provides data striping (spreading out blocks of each file across multiple disk drives) but no redundancy. This improves performance but does not deliver fault tolerance. If one drive fails then all data in the array is lost. Level 1 -- Mirroring and Duplexing: Provides disk mirroring. Level 1 provides twice the read transaction rate of single disks and the same write transaction rate as single disks. Level 2 -- Error-Correcting Coding: Not a typical implementation and rarely used, Level 2 stripes data at the bit level rather than the block level. Level 3 -- Bit-Interleaved Parity: Provides byte-level striping with a dedicated parity disk. Level 3, which cannot service simultaneous multiple requests, also is rarely used. Level 4 -- Dedicated Parity Drive: A commonly used implementation of RAID, Level 4 provides block-level striping (like Level 0) with a parity disk. If a data disk fails, the parity data is used to create a replacement disk. A disadvantage to Level 4 is that the parity disk can create write bottlenecks. Level 5 -- Block Interleaved Distributed Parity: Provides data striping at the byte level and also stripe error correction information. This results in excellent performance and good fault tolerance. Level 5 is one of the most popular implementations of RAID. Level 6 -- Independent Data Disks with Double Parity: Provides block-level striping with parity data distributed across all disks. Level 0+1 – A Mirror of Stripes: Not one of the original RAID levels, two RAID 0 stripes are created, and a RAID 1 mirror is created over them. Used for both replicating and sharing data among disks. Level 10 – A Stripe of Mirrors: Not one of the original RAID levels, multiple RAID 1 mirrors are created, and a RAID 0 stripe is created over these. Level 7: A trademark of Storage Computer Corporation that adds caching to Levels 3 or 4. RAID S: EMC Corporation's proprietary striped pairty RAID system used in its Symmetrix storage systems. Info from: http://www.webopedia.com/TERM/R/RAID.html
Thanks! I also found some more info about it here - http://www.pcguide.com/ref/hdd/perf/raid/index.htm Is this really necessary for home use? For gaming maybe? Would there be any improvement if you had this setup and you did video editing?
I got a buddy with a RAID 1 set-up, yes it is very noticeably faster on reads. But if your not a power user, it is really not necessary for the personal home use. Sure it would help gaming, but for that it's really the video card nowadays. You wouldn't notice that much difference in video editing (writing to the disk(s)) It improves drive read speeds which improves access times basically. My next machine will be set-up RAID 1, I hope!! Weycraze
