DELL U7021 ユーザーズマニュアル

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Setting Up and Using Your Computer
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If a drive failure occurs, subsequent read and write operations are directed to the surviving drive. A 
replacement drive can then be rebuilt using the data from the surviving drive. Also, because data is 
duplicated on both drives, two 120-GB RAID level 1 drives collectively have a maximum of 120-GB 
on which to store data.
Configuring Your Computer for RAID
At some point you may want to configure your computer for RAID if you did not select a RAID 
configuration when you purchased your computer. You must have at least two hard drives installed 
in your computer to set up a RAID configuration. For instructions on how to install a hard drive, 
see page 91.
You can use one of two methods to configure RAID hard drive volumes. One method uses the 
Intel(R) Option ROM utility, and is performed before you install the operating system onto the 
hard drive. The second method uses the Intel Application Accelerator, or Intel Storage Utility, and 
this method is performed after you have installed the operating system and the Intel Storage 
Utility. Both methods require that you set your computer to RAID-enabled mode before starting 
any of the RAID configuration procedures in this document.
Setting Your Computer to RAID-Enabled Mode
Enter system setup (see page 120).
2 Use the up- and down-arrow keys to highlight Drives, and press <Enter>.
3 Use the up- and down-arrow keys to highlight Drive Controller, and press <Enter>.
4 Use the left- and right-arrow keys to highlight RAID On, press <Enter>, and then 
press <Esc>.
hard drive 1
segment 1
segment 2
segment 3
hard drive 2
segment 4
segment 5
segment 6
segment 1 duplicated
segment 2 duplicated
segment 3 duplicated
segment 4 duplicated
segment 5 duplicated
segment 6 duplicated
serial ATA RAID 
configured for 
RAID level 1