Waffles_old
Banned
RAID GUIDE
RAID- Redundant Array of Independent Disks
Raid is quite handy. It involves combining two or more hard drives to create either more space or more security. with certain arrays however, you can have both
There are 11 different arrays available presently.
Also, a few other terms need to be defined as well before I begin the listing of RAID arrays.
Fault Tolerance- When one disk fucks up, so do the rest of them in your RAID array. The more backups you have of your information, the more fault tolerant you are.
Parity- The quality of being either odd or even. The fact that all numbers have a parity is commonly used in data communications to ensure the validity of data.
Ok, now we can start on the fun stuff, RAID J
RAID 0- Striped Disk Array without Fault Tolerance: 2 identical hard drives grouped together to make one big 1.
RAID 1- Mirroring and Duplexing: Provides disk mirroring. RAID 1 provides twice the read transaction rate of single disks and the same write transaction rate as single disks. 2 identical hard drives. 1 automatically backs up everything place on the first hard drive. Provides a small amount of fault tolerance.
RAID 2- Error-Correcting Coding: Not a common RAID array, RAID 2 stripes data at the bit level as opposed to the block level. RAID 2 is VERY expensive and requires MANY drives…
Either 10 data disks and 4 ECC disks, or 32 data disks and 7 ECC disks, which ends up being a lot of money…
RAID 3- Bit-Interleaved Parity: Provides byte-level striping with a dedicated parity disk. RAID 3, which cannot service simultaneous multiple requests, is also not utilized very often for this exact reason.
RAID 4- Dedicated Parity Drive: A common RAID configuration, RAID 4 uses block-level striping (like RAID 0) with a parity disk. If a data disk fails, the parity data is used to create a replacement disk. A disadvantage to RAID 4 is that the parity disk can create write bottlenecks.
RAID 5- Block Interleaved Distributed Parity: Uses data striping at the byte level and stripe error correction information. This produces excellent performance and good fault tolerance. RAID 5 is one of the most popular implementations of RAID.
RAID 6- Independent Data Disks with Double Parity: Uses block-level striping with parity data distributed across all disks.
RAID 7- A common configuration among Storage Computer Corporations that adds caching to RAID 3 or 4.
RAID 0+1- A Mirror of Stripes: 2 raid 0 configurations in raid 1
RAID 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. Quite similar to RAID 0+1
RAID S- EMC Corporation's proprietary striped parity RAID system used in its Symmetrix storage systems.
RAID- Redundant Array of Independent Disks
Raid is quite handy. It involves combining two or more hard drives to create either more space or more security. with certain arrays however, you can have both
There are 11 different arrays available presently.
Also, a few other terms need to be defined as well before I begin the listing of RAID arrays.
Fault Tolerance- When one disk fucks up, so do the rest of them in your RAID array. The more backups you have of your information, the more fault tolerant you are.
Parity- The quality of being either odd or even. The fact that all numbers have a parity is commonly used in data communications to ensure the validity of data.
Ok, now we can start on the fun stuff, RAID J
RAID 0- Striped Disk Array without Fault Tolerance: 2 identical hard drives grouped together to make one big 1.
RAID 1- Mirroring and Duplexing: Provides disk mirroring. RAID 1 provides twice the read transaction rate of single disks and the same write transaction rate as single disks. 2 identical hard drives. 1 automatically backs up everything place on the first hard drive. Provides a small amount of fault tolerance.
RAID 2- Error-Correcting Coding: Not a common RAID array, RAID 2 stripes data at the bit level as opposed to the block level. RAID 2 is VERY expensive and requires MANY drives…
Either 10 data disks and 4 ECC disks, or 32 data disks and 7 ECC disks, which ends up being a lot of money…
RAID 3- Bit-Interleaved Parity: Provides byte-level striping with a dedicated parity disk. RAID 3, which cannot service simultaneous multiple requests, is also not utilized very often for this exact reason.
RAID 4- Dedicated Parity Drive: A common RAID configuration, RAID 4 uses block-level striping (like RAID 0) with a parity disk. If a data disk fails, the parity data is used to create a replacement disk. A disadvantage to RAID 4 is that the parity disk can create write bottlenecks.
RAID 5- Block Interleaved Distributed Parity: Uses data striping at the byte level and stripe error correction information. This produces excellent performance and good fault tolerance. RAID 5 is one of the most popular implementations of RAID.
RAID 6- Independent Data Disks with Double Parity: Uses block-level striping with parity data distributed across all disks.
RAID 7- A common configuration among Storage Computer Corporations that adds caching to RAID 3 or 4.
RAID 0+1- A Mirror of Stripes: 2 raid 0 configurations in raid 1
RAID 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. Quite similar to RAID 0+1
RAID S- EMC Corporation's proprietary striped parity RAID system used in its Symmetrix storage systems.
Reps!
ooo well format it will be for me.
