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10. Move the Clear CMOS /Recovery jumper back to the standard position (pin 1 and pin 2).
11. Repeat step 6 and step 7. Then, turn on your computer.
BIOS level
An incorrect BIOS level can cause false errors and unnecessary FRU replacement. Use the following
information to determine the currently installed BIOS level, the latest BIOS level available, and where to
obtain the latest BIOS level.
• To determine the currently installed BIOS level, start the Setup Utility program and view the BIOS
Revision Level on the Main page.
• Sources for obtaining the latest BIOS level available
– Lenovo support Web site:
– Lenovo Customer Support Center
– Levels 1 and 2 Support
To update the BIOS, see "Updating and recovering the BIOS" on page 71.
Note: BIOS settings vary by operating system. Change the BIOS settings before installing a new operating
system. See "Changing the BIOS settings before installing a new operating system" on page 68.
Configuring RAID
This chapter provides information about how to configure Redundant Array of Independent Disks (RAID) for
your computer.
An Introduction to RAID
RAID is a technology that provides increased storage functions and reliability through redundancy.
When a group of independent physical storage drives is set up to use RAID technology, they are in a RAID
array. This array distributes data across multiple storage drives, but the array appears to the host computer
as one single storage unit. Creating and using RAID arrays provides high performance, such as the expedited
I/O performance, because several drives can be accessed simultaneously.
RAID drive groups configured according to certain RAID levels also improve data storage reliability and fault
tolerance compared with single-drive storage systems. Data loss resulting from a drive failure can be
prevented by reconstructing missing data from the remaining drives.
Note: For RAID 0, the missing data resulting from a drive failure cannot be reconstructed.
RAID Level
Your computer must have the minimum number of SATA storage drives installed for the supported level of
RAID below:
• RAID 0: striped disk array
– Consists of at least two SATA storage drives
– Supported strip size: 4 KB, 8 KB, 16 KB, 32 KB, 64 KB, or 128 KB
– Better performance without fault tolerance
• RAID 1: mirrored disk array
– Consists of two SATA storage drives
– Improved reading performance and 100% redundancy
72
P330 Hardware Maintenance Manual
http://www.lenovo.com/support
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