IBM DS3000 Introduction And Implementation Manual page 79

System storage

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7065DS3KBasicConfig.fm

Draft Document for Review August 30, 2007 12:59 am

Figure 4-4 RAID 5

As stated above, RAID 1 can only be configured on exactly two disk drives. RAID 10 is a way

to expand mirroring onto four or more disk drives. It is actually a combination of mirroring and

RAID 0 (striping), as shown in Figure 4-5 on page 48. RAID 10 provides excellent data

availability. If a disk drive fails, all the data can still be accessed. Performance is also

excellent, as the data is striped in a way similar to RAID 0. The only drawback is that the

usable capacity is only 50% of total storage capacity.

Chapter 4. Basic configuration

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