Toshiba Magnia 560S - Manual (Page 124)

Configuring Arrays and Logical Drives 106
MegaRAID BIOS Configuration Utility
Easy Configuration
In Easy Configuration, each physical array you create is associated with exactly one
logical drive, and you can modify the following parameters:
•
RAID level
•
Stripe size
•
Cache write policy
•
Read policy
•
I/O policy
If logical drives have already been configured when you select Easy Configuration, the
configuration information is not disturbed. See Section "Using Easy Configuration,"
for instructions on Easy Configuration.
New Configuration
In New Configuration, you can select the following logical drive parameters:
•
RAID level
•
Stripe size
•
Cache write policy
•
Read policy
•
I/O policy
•
Logical drive size
•
Spanning of arrays
If you select New Configuration, the existing configuration information on the selected
controller is destroyed when the new configuration is saved. See Section "Using New
Configuration," for instructions on New Configuration.
View/Add Configuration
View/Add Configuration allows you to control the same logical drive parameters as
New Configuration without disturbing the existing configuration information. You can
also select Configuration on Disk or Configuration on NVRAM, in case of a
configuration mismatch detected and reported by the firmware at boot time.
Designating Drives as Hot Spares
Hot spares are physical drives that are powered up along with the RAID drives and
usually stay in a standby state. If a disk drive used in a RAID logical drive fails, a hot
spare will automatically take its place and the data on the failed drive is reconstructed
on the hot spare. Hot spares can be used for RAID levels 1, 5, 10, and 50. Each
MegaRAID controller supports up to eight hot spares.
The methods for designating physical drives as hot spares are:
•
Press <F4> while creating arrays in Easy, New or View/Add Configuration mode.
•
From the Objects/Physical Drive menu, select a physical drive and press <Enter>.
Select Make HotSpare.