Advanced Features
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RAID Level 1
RAID level 1 uses a data-redundancy storage technique known as "mirroring."
When data is written to the primary drive, the data is then duplicated—or
mirrored—on the other drive. A RAID level 1 configuration sacrifices high-data
access rates for its data redundancy advantages.
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.
RAID Level 5
RAID level 5 uses a data-staging storage technique known as "parity checking."
When a block of data is written to the RAID configuration, it is striped across all
of the drives in the RAID array except for one drive, to which is written parity
data. The parity data is information that allows for the entire block of striped
data to be calculated if one of the drives fails.
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
Содержание Precision NX046
Страница 1: ...w w w d e l l c o m s u p p o r t d e l l c o m Dell Precision T5400 User s Guide Model DCTA ...
Страница 18: ...18 Finding Information ...
Страница 43: ...About Your Computer 43 ...
Страница 44: ...44 About Your Computer ...
Страница 88: ...88 Securing Your Computer ...
Страница 120: ...120 Troubleshooting ...
Страница 140: ...140 Troubleshooting Tools ...
Страница 234: ...234 Adding and Replacing Parts 1 drive panel 2 sliding plate 3 sliding plate lever 1 2 3 Tower Orientation ...
Страница 238: ...238 Adding and Replacing Parts 1 drive panel tabs 2 drive panel 2 Tower Orientation 1 ...
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Страница 296: ...296 Getting Help ...
Страница 316: ...316 Glossary ...