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Chapter 3
Interface Boards and Mass-Storage
Drivers
HP FastRAID2
Read/write caching is an advantageous option, but the primary function of the FastRAID2
solution is to provide enhanced hard drive performance through two supported modes:
• Raid0 (default configuration): This configuration provides data read/write acceleration
using one or two hard drives (of the same capacity and speed) through disk striping. In
general terms, data blocks are divided and stored between two hard drives using a
method called disk striping. It is important to point out that there is no redundancy of
data storage, and the RAID 0 mode does not, in any way, reduce the necessity of backing
up stored data.
NOTE
To obtain the benefits of read/write caching using the ARO2 adapter in a
system with only one hard drive, it is necessary to select the RAID0 mode.
• Raid1 configuration: This configuration provides software mirroring and caching. Data
is mirrored (duplicated) using a hard disk pair. If one disk fails, the data is still
available on the mirrored drive. The RAID 1 configuration also provides an
improvement in performance using the cache on the ARO2 adapter. It does not,
however, provide the same throughput as the RAID 0 configuration. In addition,
because data is mirrored, the storage capacity of your drives is only half of the physical
capacity of the drives.
One of the above modes may be selected using the ArrayConfig utility. This utility is
described in detail in the User’s Guide supplied with the Personal Workstation.
The ARO2 adapter and hard drive(s) come pre-configured for maximum performance
(RAID 0) but may also be configured to provide protection against data loss (RAID 1).
CAUTION
Configurations RAID5 and RAID10 are not supported.
The ARO2 adapter is supplied with 16 MB SIMM installed in the adapter memory slot. If
the adapter must be replaced, do not remove the SIMM because the replacement adapter
will be supplied with its own SIMM. In addition, no re-configuration of the FastRAID2 I/O
subsystem is necessary following the replacement of the ARO2 adapter, as all information
concerning the FastRAID2 configuration is stored on the hard disk drive(s).
Содержание X Class 500/550MHz
Страница 6: ...6 Contents ...
Страница 8: ...8 Figures ...
Страница 15: ...15 1 System Overview ...
Страница 66: ...66 Chapter2 System Board Devices on the ISA Bus ...
Страница 96: ...96 Chapter3 Interface Boards and Mass Storage Drivers Connectors and Sockets ...
Страница 134: ...134 Chapter5 Tests and Error Messages Beep Codes ...
Страница 135: ...135 A Regulatory Information and Warranty ...
Страница 146: ...146 AppendixA Regulatory Information and Warranty HP Hardware Warranty ...