Dell 341-7212 User Guide - Page 88

RAID 6, RAID Level, Raw Size

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RAID 6 RAID 6 uses data striping and dual parity across four or more disks (distributed parity) to provide high data throughput and data redundancy especially for applications that require random access. RAID 6 can survive the failure of two disk drives. The PERC 6/i controller supports RAID 6. RAID 10 RAID 10, a combination of RAID 0 and RAID 1, uses data striping across mirrored spans. It provides high data throughput and complete data redundancy. The PERC 5/i controller and the PERC 6/i controller support RAID 10. RAID 50 A combination of RAID 0 and RAID 5 that uses data striping across two disk groups with parity data. It provides high data throughput and complete data redundancy. The PERC 5/i controller and the PERC 6/i controller support RAID 50. RAID 60 A combination of RAID 0 and RAID 6 that uses data striping across two disk groups with parity data. It provides high data throughput and complete data redundancy. RAID 60 can survive the failure of two disk drives in each RAID set in the spanned array. The PERC 6/i controller supports RAID 60. RAID Level A set of techniques applied to disk groups to deliver higher data availability, and/or performance characteristics to host environments. Each virtual disk must have a RAID level assigned to it. A virtual disk property indicating the RAID level of the virtual disk. Dell PERC 5/i controllers support RAID levels 0, 1, 5, 10, and 50. Dell PERC 6/i controllers support RAID levels 0, 1, 5, 6, 10, 50, and 60. The Dell SAS 5/iR controller and the Dell SAS 6/iR controller support RAID levels 0 and 1. Raw Size A physical drive property indicating the actual full size of the drive, before any Coercion Mode is applied to reduce the size. 88 Glossary

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88
Glossary
RAID 6
RAID 6 uses data striping and dual parity across four or more disks (distributed
parity) to provide high data throughput and data redundancy especially for
applications that require random access. RAID 6 can survive the failure of two
disk drives. The PERC 6/i controller supports RAID 6.
RAID 10
RAID 10, a combination of RAID 0 and RAID 1, uses data striping across
mirrored spans. It provides high data throughput and complete data
redundancy. The PERC 5/i controller and the PERC 6/i controller support RAID
10.
RAID 50
A combination of RAID 0 and RAID 5 that uses data striping across two disk
groups with parity data. It provides high data throughput and complete data
redundancy. The PERC 5/i controller and the PERC 6/i controller support
RAID 50.
RAID 60
A combination of RAID 0 and RAID 6 that uses data striping across two disk
groups with parity data. It provides high data throughput and complete data
redundancy. RAID 60 can survive the failure of two disk drives in each RAID set
in the spanned array. The PERC 6/i controller supports RAID 60.
RAID Level
A set of techniques applied to disk groups to deliver higher data availability,
and/or performance characteristics to host environments. Each virtual disk must
have a RAID level assigned to it. A virtual disk property indicating the RAID
level of the virtual disk. Dell PERC 5/i controllers support RAID levels 0, 1, 5,
10, and 50. Dell PERC 6/i controllers support RAID levels 0, 1, 5, 6, 10, 50, and
60. The Dell SAS 5/iR controller and the Dell SAS 6/iR controller support RAID
levels 0 and 1.
Raw Size
A physical drive property indicating the actual full size of the drive, before any
Coercion Mode is applied to reduce the size.