RAID. RAID (originally redundant array of inexpensive disks; now commonly redundant array of independent disks) is a data storage virtualization technology that combines multiple disk drive components into a logical unit for the purposes of data redundancy or performance improvement.[1] History[edit] Although not yet using that terminology, each of the five levels of RAID named in the paper were well established in the art prior to the paper's publications, for example: Around 1983, DEC began shipping subsystem mirrored RA8X disk drives (now known as RAID 1) as part of its HSC50 subsystem.[3]Around 1988, the Thinking Machines DataVault used error correction codes (now known as RAID 2) in an array of disk drives.[4] A similar approach was used in the 1970s on the IBM 3330.[5]In 1977, Norman Ken Ouchi at IBM filed a patent disclosing what was subsequently named RAID 4.[6]In 1986, Clark et al. at IBM filed a patent disclosing what was subsequently named RAID 5.[7] Concept[edit] Standard levels[edit]
RAID. History[edit] Each of the five levels of RAID named in the paper were well established in the art prior to the paper's publications, for example: Around 1983, DEC began shipping subsystem mirrored RA8X disk drives (now known as RAID 1) as part of its HSC50 subsystem.[7]Around 1988, the Thinking Machines DataVault used error correction codes (now known as RAID 2) in an array of disk drives.[8] A similar approach was used in 1970s on the IBM 3330.[9]In 1977, Norman Ken Ouchi at IBM filed a patent disclosing what was subsequently named RAID 4.[10]In 1986, Clark et al. at IBM filed a patent disclosing what was subsequently named RAID 5.[11] Standard levels[edit] A number of standard schemes have evolved. These are called levels. Originally, there were five RAID levels, but many variations have evolved—notably several nested levels and many non-standard levels (mostly proprietary).
RAID 0 comprises striping (but no parity or mirroring). RAID 1 comprises mirroring (without parity or striping). Standard RAID levels. The standard RAID levels are a basic set of RAID configurations that employ the techniques of striping, mirroring, or parity to create large reliable data stores from general purpose computer hard disk drives. The most common types today are RAID 0 (striping), RAID 1 and variants (mirroring), RAID 5 (distributed parity) and RAID 6 (dual parity). RAID levels and their associated data formats are standardized by the Storage Networking Industry Association in the Common RAID Disk Drive Format (DDF) standard.[1] RAID 0[edit] Diagram of a RAID 0 setup A RAID 0 (also known as a stripe set or striped volume) splits data evenly across two or more disks (striped) without parity information for speed. RAID 0 was not one of the original RAID levels and provides no data redundancy.
A RAID 0 can be created with disks of differing sizes, but the storage space added to the array by each disk is limited to the size of the smallest disk. Performance[edit] RAID 1[edit] Diagram of a RAID 1 setup RAID 2[edit] . Disk array controller. A disk array controller name is often improperly shortened to a disk controller. The two should not be confused as they provide very different functionality.
Front-end and back-end side[edit] A disk array controller provides front-end interfaces and back-end interfaces. Back-end interface communicates with controlled disks. A single controller may use different protocols for back-end and for front-end communication. Enterprise controllers[edit] Those external disk arrays are usually purchased as an integrated subsystem of RAID controllers, disk drives, power supplies, and management software. Simple controllers[edit] A simple disk array controller may fit inside a computer, either as a PCI expansion card or just built onto a motherboard.
As of February 2007[update] Intel started integrating their own Matrix RAID controller in their more upmarket motherboards, giving control over 4 devices and an additional 2 SATA connectors, and totalling 6 SATA connections (3Gbit/s each). History[edit] Standard RAID levels. In computer storage, the standard RAID levels comprise a basic set of RAID configurations that employ the techniques of striping, mirroring, or parity to create large reliable data stores from multiple general-purpose computer hard disk drives (HDDs).
The most common types are RAID 0 (striping), RAID 1 and its variants (mirroring), RAID 5 (distributed parity), and RAID 6 (dual parity). RAID levels and their associated data formats are standardized by the Storage Networking Industry Association (SNIA) in the Common RAID Disk Drive Format (DDF) standard.[1] RAID 0[edit] Diagram of a RAID 0 setup RAID 0 (also known as a stripe set or striped volume) splits data evenly across two or more disks (striped), without parity information and with speed as the intended goal. A RAID 0 setup can be created with disks of differing sizes, but the storage space added to the array by each disk is limited to the size of the smallest disk. Performance[edit] RAID 1[edit] Diagram of a RAID 1 setup RAID 2[edit] .
ICH10R Raid5 Help - Page 2 - Overclock.net - Overclocking.net. Sorry to revive an old thread but i have a continuation to this. I did eventually get the raid set up with 2 arrays instead of 2 partitions like suggested and ended up with a bootable raid 5 50gb for an os and a nonbootable 2.6tb raid 5 array for data, both set with a 64k stripe size. TBH things didnt impove a great deal, ever sinse ive had it loaded transfers have been very slow. 10-15mb cross gigabit network and 20-30mb from raid to esata drive which tbh i think is poor. i did a few things, played with jumbo frames, set all adapters to 4k like was suggested on a post i read which didnt seem to help. eventually i got tired of being able to redownload films faster than i could stabily stream them that i backed up my 2tb of data and flattened my raid completely.
Just out of curiosity i loaded freenas to a 4gb usb pen and fired it up. What troubles me is that a purpose designed server os like win2k8 cant seem to achieve this.