Technology Talks

Studying for an Information Systems exam tomorrow. This is what I have learned in the last 3 minutes:

RAID: Hard Drives Working Together

Two or more hard drives work together as an array of drives
--Improves fault tolerance
--Improves performance

Most common RAID levels
--RAID 0, RAID 1, RAID 5

Spanning or JBOD (Just a Bunch of Disks)
--Two hard drives configured as a single volume

RAID is accomplished using hardware or software

Just a bunch of disks, huh.

Krellyn wrote:Studying for an Information Systems exam tomorrow. This is what I have learned in the last 3 minutes:

RAID: Hard Drives Working Together

Two or more hard drives work together as an array of drives
--Improves fault tolerance
--Improves performance

Most common RAID levels
--RAID 0, RAID 1, RAID 5

Spanning or JBOD (Just a Bunch of Disks)
--Two hard drives configured as a single volume

RAID is accomplished using hardware or software

Just a bunch of disks, huh.

RAID = Redundant Array of Inexpensive Disks.

Raid 0 - Block level Striping.
- All data split between disks.
- Zero fault tolerance. If data is corrupt on one drive, goodbye!
- Best Read/Write performance
Raid 1 - Mirror.
- All data copied onto the disks.
- Highest fault tolerance.
- If Data isn't corrupt on one drive, you can rebuild it all.

Raid 5 - Block-level striping with distributed parity.
- Requires (N-1) drives.
- (If you have 3, you have the performance of 2 If you have 6, you have performance of 5, etc..)
- Allows 1 drive to fail. If more than 1 fails, data loss will happen.

JBOD = Just a Bunch Of Drives. Refers to multiple drives in any format.

Onlyme wrote:

Krellyn wrote:Studying for an Information Systems exam tomorrow. This is what I have learned in the last 3 minutes:

RAID: Hard Drives Working Together

Two or more hard drives work together as an array of drives
--Improves fault tolerance
--Improves performance

Most common RAID levels
--RAID 0, RAID 1, RAID 5

Spanning or JBOD (Just a Bunch of Disks)
--Two hard drives configured as a single volume

RAID is accomplished using hardware or software

Just a bunch of disks, huh.

RAID = Redundant Array of Inexpensive Disks.

Raid 0 - Block level Striping.
- All data split between disks.
- Zero fault tolerance. If data is corrupt on one drive, goodbye!
- Best Read/Write performance
Raid 1 - Mirror.
- All data copied onto the disks.
- Highest fault tolerance.
- If Data isn't corrupt on one drive, you can rebuild it all.

Raid 5 - Block-level striping with distributed parity.
- Requires (N-1) drives.
- (If you have 3, you have the performance of 2 If you have 6, you have performance of 5, etc..)
- Allows 1 drive to fail. If more than 1 fails, data loss will happen.

JBOD = Just a Bunch Of Drives. Refers to multiple drives in any format.

Pretty much sums up the chapter hahaha.

I just love the name "Just a Bunch of Drives."