User guide

Supported RAID configurations
All workstation platforms have Intel controllers, as follows:
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LSI 2308 controllers — HP Z820 Workstations
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LSI 9212-4i controllers — HP Z420 and Z620 Workstations (optional)
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LSI 9260-8i controllers — HP Z420, Z620, and Z820 Workstations (optional)
The following RAID configurations are supported:
Table B-2 RAID configuration details
Configuration Description Controllers
RAID 0
Integrated striped disk
array
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Requires a minimum of two drives.
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Provides improved I/O performance.
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Provides no fault tolerance.
●
Loses all data if any disk in the array fails.
●
Increases disk performance.
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Intel with RSTe or RST
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LSI 2308
●
LSI 9212-4i
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LSI 9260-8i
RAID 1
Mirrored disk array
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Supports a minimum of two drives..
●
Provides 100% redundancy: all data from one
drive is duplicated on a second drive.
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Recovers from a single-drive failure.
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Serves as a good entry-level redundant system.
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Intel with RSTe or RST
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LSI 2308
●
LSI 9212-4i
●
LSI 9260-8i
RAID 5
Striped disk array with
distributed parity
●
Supports three or more drives.
●
Provides fault tolerance and I/O performance
improvement, especially for write-biased
applications.
●
Retains all data if a single drive fails but
performance is compromised until the failed
drive is replaced and the array rebuilt.
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Intel with RSTe or RST
●
LSI 9260-8i
RAID 10
Striped and mirrored
disk array
●
Supports four or more drives.
●
Provides excellent.
●
Uses several drives to stripe data, then copies the
striped drives to provide redundancy.
●
Offers high data transfer of striped arrays and
provides increased data accessibility (reads).
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Intel with RSTe or RST
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LSI 2308
●
LSI 9212-4i
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LSI 9260-8i
RAID 1E
Two-way mirroring
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Provides benefits comparable to RAID 10.
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Requires an odd number of drives.
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Delivers improved read performance.
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LSI 2308
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LSI 9212-4i
168 Appendix B Configuring RAID devices