Appendix D Raid Quick Reference; Comparing Raid Levels - Adaptec 5325302057 User Manual

RAID Quick Reference
This appendix provides quick-reference information about the RAID levels
supported by your iSCSI Storage Appliance.

Comparing RAID Levels

Use this table to select the RAID levels that are most appropriate for the pools on
your IP SAN, based on the number of available disk drives and your requirements
for performance and reliability. Only the RAID levels supported by your iSCSI
Storage Appliance are listed.
RAID
Level Redundancy
RAID 0
RAID 1
RAID 1E
RAID 10
RAID 5
RAID 50
RAID 6
RAID 60
Spanned
Volume
Disk drive usage, read performance, and write performance depend on the number
of drives in the pool. In general, the more drives, the better the performance. More
information about each RAID level is available in the Glossary on page 211.
None of the RAID levels listed include a built-in hot spare.
Note
Disk
Drive
Usage
No 100%
Yes 50%
Yes 50%
Yes 50%
Yes 67% – 94%
Yes 67% – 94%
Yes 50% – 88%
Yes 50% – 88%
No 100%
Read Write
Performance Performance
✱ ✱ ✱ ✱ ✱ ✱
✱ ✱
✱ ✱
✱ ✱
✱ ✱ ✱
✱ ✱ ✱
✱ ✱
✱ ✱
✱
Snap Server 700i Series User's Guide
Appendix D
Minimum
Disk Drives
2
2
✱ ✱
✱ ✱ 3
✱ ✱ 4
✱ 3
6
✱
✱ 4
✱ 8
2
✱
199