Raid 50 Logical Drives - Adaptec ICP5045BL User Manual

RAID 50 Logical Drives

A RAID 50 logical drive is built from at least six disk drives configured as two or more RAID 5
logical drives, and stripes stored data and parity data across all disk drives in both RAID 5
logical drives. (For more information, see
The parity data provides data protection, and striping improves performance. RAID 50 logical
drives also provide high data transfer speeds.
Drive segment size is limited to the size of the smallest disk drive in the logical drive. For
example, three 250 GB disk drives and three 400 GB disk drives comprise two equal-sized
RAID 5 logical drives with 500 GB of stored data and 250 GB of parity data. The RAID 50
logical drive can therefore contain 1000 GB (2 x 500 GB) of stored data and 500 GB of parity
data.
1, 5, P
Drive 1
250 GB
In this example, P represents the distributed parity data.
RAID 50 Logical
Drive
=
1000 GB
plus Parity
Each RAID 5 Logical Drive has
RAID 5
500 GB Data Storage
A
250 GB Parity Data
3, P, 9 P, 7, 11
Drive 2 Drive 3
250 GB 250 GB
Appendix B: Selecting the Best RAID Level
RAID 5 Logical Drives on page
RAID 5
B
2, 6, P 4, P, 10 P, 8, 12
Drive 4 Drive 5 Drive 6
400 GB 400 GB 400 GB
146
●
144.)
Total Unused
Space = 150 GB