LSI 1600 Manual De Usuario
MegaRAID Enterprise 1600 Hardware Guide
44
Planning the Array Configuration
Answer the following questions about this array:
Question
Answer
Number of MegaRAID SCSI channels
4
Number of physical disk drives in the array
Purpose of this array. Rank the following factors:
Maximize drive capacity
Maximize the safety of the data (fault tolerance)
Maximize hard drive performance and throughput
How many hot spares?
Amount of cache memory installed on the MegaRAID
Are all of the disk drives and the server that MegaRAID is
installed in protected by a UPS?
Purpose of this array. Rank the following factors:
Maximize drive capacity
Maximize the safety of the data (fault tolerance)
Maximize hard drive performance and throughput
How many hot spares?
Amount of cache memory installed on the MegaRAID
Are all of the disk drives and the server that MegaRAID is
installed in protected by a UPS?
Using the Array Configuration Planner The following table lists the possible RAID levels, fault tolerance, and
effective capacity for all possible drive configurations for an array consisting of one to eight
drives.
drives.
The following table does not take into account any hot spare (standby) drives. You should always
have a hot spare drive in case of drive failure.
have a hot spare drive in case of drive failure.
RAID 1requires two drives. RAID 10 requires at least four drives. RAID 30 and RAID 50 require
at least six drives.
at least six drives.