Characteristics of different RAID configs

By peter.stilgoe









RAID 0 (Stripe set without parity)

•No Fault Tolerance
•Best read and write performance
•I/O per disk calculation: (reads + writes) / number of disks

RAID 1 (Mirrored Volume)

•Fault Tolerance: 1 Disk may fail
•Performance: Good read, Acceptable write
•I/O per disk calculation: [(Reads + (2 x Writes)] / 2

RAID 5 (Stripe set with parity)

•Fault Tolerance: One disk may fail
•Performance: Excellent read, fairly poor write
•I/O per disk calculation: [(Reads + (4 x Writes)] / Number of Disks

RAID 10 (Stripe of Mirrors)

•Fault Tolerance: Half of the disks may fail (but not both disks in any mirrored pair)
•Performance: Excellent read and write
•I/O per disk calculation: [(Reads + (2 x Writes)] / Number of Disks




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About... peter.stilgoe

peter.stilgoeThis author published 482 posts in this site.
Sharepoint, InfoPath, K2, Nintex, Business Process Mapping, Business Intelligence, Automation, ECM, Document Management, Document Imaging, Internet Marketing & Online Business Consultant Email / MSN: pstilgoe@hotmail.com LinkedIn: Pete Stilgoe - Sharepoint Consultant









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