RAID

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Related to RAID 5: RAID 10

RAID

abbreviation for redundant array of inexpensive disks, a computer data storage system with rapid access time and enhanced fault tolerance.
References in periodicals archive ?
Following figure illustrates how the shadow section is created in the process of disk array recovery in the RAID 5 composed of 4 hard disks:
n] than by using conventional RAID 5, compound and "hot spare" configurations.
Jerry Namery, stated, "Our Enterprise RAID 6 products use dual hardware ASICs to speed RAID 6 parity calculations so that our RAID 6 arrays are about as fast as our RAID 5 arrays and faster than most RAID 5 offerings - yet cost less than RAID 5 from other companies.
An Enterprise RAID 6 storage system continues to provide RAID 5 protection after the first disk drive failure and closes the window of vulnerability.
Unlike a standard RAID 5 array, this method can withstand a minimum of three simultaneous drive failures and still continue to run properly--all transparently to system users.
For each RAID 5 write, it is, therefore, necessary to perform up to four data transfers before the write command has been fully completed and the parity information on the parity drive has been updated.
Traditionally in RAID 5 environments without BBU, manufacturers recommend setting controller cache to "write-through" and disabling "disk cache.
For example, a terabyte of RAID 5 storage consisting of fiftyeight 18GB disk drives can expect a drive to fail every 44 days
Write performance is typically slower, such that if your environment is skewed toward disk writes, you might consider changing the RAID level, say, from RAID 5 to RAID 1.
x (ext3) using the 8500 series considerably boosts RAID 5 reads by 125% at 408 MB/s and writes by 224% at 107 MB/s.
Competition in RAID 5 Sequential Reads and Writes -- Ideal for All