User Guide
97
www.bull.com
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RAID 5
RAID level 5 organizes data across the disk drives of the logical drive, and
distributes parity information across the disk drives along with the data blocks.
This organization allows increased performance by accessing multiple disk drives
simultaneously for each operation, as well as fault tolerance by providing parity
data. In the event of a disk drive failure, data can be re-calculated by the RAID
system based on the remaining data and the parity information.
The adjustable block size of the RAID 5 logical drive allows for performance
tuning based on the typical I/O request sizes for your system. The block size must
be set at the time the logical drive is created and cannot be adjusted dynamically.
RAID 5 makes efficient use of hard drives and is the most versatile RAID Level. It
works well for file, database, application and web servers.
The capacity of a RAID 5 logical drive is the smallest disk drive size multiplied by
the number of disk drives, less one. Hence, a RAID 5 logical drive with four 100
GB disk drives will have a capacity of 300 GB. A logical drive with two 120 GB
disk drives and one 100 GB disk drive will have a capacity of 200 GB.
Содержание NovaScale T840
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Страница 11: ...User Guide 11 www bull com Specifications 290 Equipment Log 292 Hardware 293 Software 298 ...
Страница 187: ...User Guide 187 www bull com Figure 105 SAS Cable 1 to 4 A Backplane connector B Motherboard connectors ...
Страница 222: ...User Guide 222 www bull com Collecting the Memory Dump If applicable set to collect the memory dump debug information ...
Страница 283: ...User Guide 283 www bull com Error Manager Menu The Error Manager Menu displays any errors encountered during POST ...
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Страница 302: ...BULL CEDOC 357 AVENUE PATTON B P 20845 49008 ANGERS CEDEX 01 FRANCE REFERENCE 86 A1 97EV 01 ...