Appendix
NVIDIARAID
RAID Arrays
This section describes the following types of RAID arrays that NVIDIA RAID supports:
vRAID 0
RAID 0 defines a disk striping scheme that improves the disk read and write times for many applications.
vRAID 1
RAID 1 defines techniques for mirroring data. vRAID 0+1
RAID 0+1 combines the techniques used in RAID 0 and RAID 1 arrays. vRAID 5
RAID 5 provides fault tolerance and better utilization of disk capacity. vSpanning (JBOD)
JBOD provides a method for combining drives of different sizes into one large disk.
Summary of RAID Configurations
Array | Advantages | Drawbacks | # Hard Disks Fault Tolerance |
RAID 0 High data throughput. | No fault tolerance. | ||||
RAID 1 100% data | redund- | Requires two drives | |||
| ancy. |
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| for the storage space |
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| of one drive. |
RAID | Optimized | for both | Requires two drives | ||
0+1 | 100% | data | redun- | for the storage space | |
| d a n c y | a n d | p e r - | of one drive - the same | |
| f or manc e. | A ll ows | as RAID level 1. | ||
| spare disks. |
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|
| |
RAID 5 Fault tolerance and | Decreased write per- | ||||
| better utilization of disk | formance due to parity | |||
| space. |
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| calculations. |
JBOD | ombines and uses the | Dec reas es perfor - | |||
| capacity of odd size | mance because of the | |||
| drives. |
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| difficulty in using drives |
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| concurrently or to op- |
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| timize drives for differ- |
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| ent uses. |
multiple | None |
2 | Yes |
4+ | Yes |
3+ Yes
multiple No
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