Advantages / Disadvantages of RAID 0 vs. RAID 1 

Compliments of AC&NC Strategic and Innovative RAID solutions

RAID 0, 1

M-Tech now offers another version of RAID 0, is it called RAID 10 or 1+0 or 0+1. Only one laptop in the world can do RAID 10. M-Tech has made modifications to the MTECH D9F to allow for four internal hard drives which is key to having a RAID 10 laptop.

RAID 0: Striped Disk Array without Fault Tolerance   RAID Level 0 requires a minimum of 2 drives to implement

	Characteristics/Advantages RAID 0 implements a striped disk array, the data is broken down into blocks and each block is written to a separate disk drive   I/O performance is greatly improved by spreading the I/O load across many channels and drives   Best performance is achieved when data is striped across multiple controllers with only one drive per controller   No parity calculation overhead is involved   Very simple design   Easy to implement				Disadvantages Not a "True" RAID because it is NOT fault-tolerant   The failure of just one drive will result in all data in an array being lost   Should never be used in mission critical environments Recommended Applications   Video Production and Editing Image Editing Pre-Press Applications Any application requiring high bandwidth
	RAID 1: Mirroring and Duplexing For Highest performance, the controller must be able to perform two concurrent separate Reads per mirrored pair or two duplicate Writes per mirrored pair.   RAID Level 1 requires a minimum of 2 drives to implement     Characteristics/Advantages One Write or two Reads possible per mirrored pair   Twice the Read transaction rate of single disks, same Write transaction rate as single disks   100% redundancy of data means no rebuild is necessary in case of a disk failure, just a copy to the replacement disk   Transfer rate per block is equal to that of a single disk   Under certain circumstances, RAID 1 can sustain multiple simultaneous drive failures   Simplest RAID storage subsystem design       Disadvantages Highest disk overhead of all RAID types (100%) - inefficient   Typically the RAID function is done by system software, loading the CPU/Server and possibly degrading throughput at high activity levels. Hardware implementation is strongly recommended   May not support hot swap of failed disk when implemented in "software" Recommended Applications   Accounting Payroll Financial Any application requiring very high availability