Operating System

  RAID Level 50 requires a minimum of 6 drives to implement Recommended Products JetStor 826FXD JetStor 824FX JetStor 816FX JetStor 812FX Featured Product JetStor 826FXD Characteristics & Advantages RAID 50 should have been called "RAID 03" because it was implemented as a striped (RAID level 0) array whose segments were RAID 3 arrays (during mid-90s) Most current RAID 50 implementation is illustrated above RAID 50 is more fault tolerant than RAID 5 but has twice the parity overhead High data transfer rates are achieved thanks to its RAID 5 array segments High I/O rates for small requests are achieved thanks to its RAID 0 striping Maybe a good solution for sites who would have otherwise gone with RAID 5 but need some additional performance boost Disadvantages Very expensive to implement All disk spindles must be synchronized, which limits the choice of drives Failure of two drives in one of the RAID 5 segments renders the whole array unusable

  RAID Level 10 requires a minimum of 4 drives to implement Recommended Products JetStor 824iX JetStor 826iXD JetStor 816iX JetStor 812iX Featured Product JetStor 812iX Characteristics & Advantages RAID 10 is implemented as a striped array whose segments are RAID 1 arrays RAID 10 has the same fault tolerance as RAID level 1 RAID 10 has the same overhead for fault-tolerance as mirroring alone High I/O rates are achieved by striping RAID 1 segments Under certain circumstances, RAID 10 array can sustain multiple simultaneous drive failures Excellent solution for sites that would have otherwise gone with RAID 1 but need some additional performance boost Disadvantages Very expensive / High overhead All drives must move in parallel to proper track lowering sustained performance Very limited scalability at a very high inherent cost Recommended Applications Database server requiring high performance and fault tolerance

  Two independent parity computations must be used in order to provide protection against double disk failure. Two different algorithms are employed to achieve this purpose. RAID Level 6 requires a minimum of 4 drives to implement Recommended Products JetStor 826FXD JetStor 824FX JetStor 816FX JetStor 812FX Featured Product JetStor 812FX Characteristics & Advantages RAID 6 is essentially an extension of RAID level 5 which allows for additional fault tolerance by using a second independent distributed parity scheme (dual parity) Data is striped on a block level across a set of drives, just like in RAID 5, and a second set of parity is calculated and written across all the drives; RAID 6 provides for an extremely high data fault tolerance and can sustain multiple simultaneous drive failures RAID 6 protects against multiple bad block failures while non-degraded RAID 6 protects against a single bad block failure while operating in a degraded mode Perfect solution for mission critic...

  Each entire data block is written on a data disk; parity for blocks in the same rank is generated on Writes, recorded in a distributed location and checked on Reads. RAID Level 5 requires a minimum of 3 drives to implement Recommended Products JetStor 826FXD JetStor 824FX JetStor 816FX JetStor 812FX Featured Product JetStor 826FXD Characteristics & Advantages Highest Read data transaction rate Medium Write data transaction rate Low ratio of ECC (Parity) disks to data disks means high efficiency Good aggregate transfer rate Disadvantages Disk failure has a medium impact on throughput Most complex controller design Difficult to rebuild in the event of a disk failure (as compared to RAID level 1) Individual block data transfer rate same as single disk Recommended Applications File and Application servers Database servers Web, E-mail, and News servers Intranet servers Most versatile RAID level

  Each entire block is written onto a data disk. Parity for same rank blocks is generated on Writes, recorded on the parity disk and checked on Reads. RAID Level 4 requires a minimum of 3 drives to implement  Recommended Products JetStor 824iX JetStor 826iXD JetStor 816iX JetStor 812iX Featured Product JetStor 816iX Characteristics & Advantages Very high Read data transaction rate Low ratio of ECC (Parity) disks to data disks means high efficiency High aggregate Read transfer rate Disadvantages Quite complex controller design Worst Write transaction rate and Write aggregate transfer rate Difficult and inefficient data rebuild in the event of disk failure Block Read transfer rate equal to that of a single disk

  The data block is subdivided ("striped") and written on the data disks. Stripe parity is generated on Writes, recorded on the parity disk and checked on Reads. RAID Level 3 requires a minimum of 3 drives to implement Recommended Products JetStor 826FXD JetStor 824FX JetStor 816FX JetStor 812FX Featured Product JetStor 816FX Characteristics & Advantages Very high Read data transfer rate Very high Write data transfer rate Disk failure has an insignificant impact on throughput Low ratio of ECC (Parity) disks to data disks means high efficiency Disadvantages Transaction rate equal to that of a single disk drive at best (if spindles are synchronized) Controller design is fairly complex Very difficult and resource intensive to do as a "software" RAID Recommended Applications Video Production and live streaming Image Editing Video Editing Prepress Applications Any application requiring high throughput