Toshiba Magnia Z500 - Manual (Page 180)

System Configuration Setup
Configuring MegaRAID IDE
161
The Factors you need to consider when selecting a RAID level are
listed below.
Configuring RAID
After you have attached all physical disk drives, perform the fol-
lowing actions to prepare a RAID disk array:
1 Press the + keys to run the MegaRAID IDE Setup
Utility.
2 Define and configure one or more logical drives.
See “Using the MegaRAID IDE Setup Utility” on page 162.
3 Create and configure one or more system drives (logical
drives). Select the RAID level, write cache policy, virus pro-
tection, and DMA transfers.
4 Save the configuration.
5 Initialize the system drives. After initialization, you can install
the operating system.
Creating Mirror Array From Existing Drive
A new mirror array can be built from an existing drive by connect-
ing the old and new drive to the MegaRAID IDE. Then follow the
given steps:
Level Description and Use Pros Cons
Max.
Drives
Fault
Tolerant
0 Data divided in blocks
and distributed sequen-
tially (pure striping).
Use for non-critical data
that requires high perfor-
mance. High data through-
put for large files. No fault tolerance.
All data lost if any
drive fails. One to
Two
No
1 Data duplicated on
another disk (mirror-
ing). Use for read-inten-
sive fault-tolerant
systems. 100 percent data
redundancy. Doubles disk
space consump-
tion. Reduced per-
formance during
rebuilds. Two Yes