Adaptec 7220ss User Guide
A-10
Storage Concepts
Applications Suitable for Striped Sets
Compared to RAID arrays, striped sets are not well-suited for
online storage of important data. They can, however, be useful for
storing the following:
online storage of important data. They can, however, be useful for
storing the following:
■
Program image libraries or run-time libraries
■
Large tables or read-only data structures
The above applications can be backed up on tape or on other
RAID arrays for security, while a copy on a striped array can
provide rapid application access.
RAID arrays for security, while a copy on a striped array can
provide rapid application access.
■
Data collected from external sources at a very high transfer rate
This is best suited for situations where the data can be restored
or is reproducible by repeating the process which produced it.
or is reproducible by repeating the process which produced it.
■
Page files or swap files
Mirror Set (RAID 1)
A mirror set is an array made up of two equal-sized partitions that
reside on two different disk drives. A mirror set stores and
maintains the same (redundant) data on each of the two drives.
Since a mirror set is an independent access array, it supports
multiple simultaneous read and write operations.
reside on two different disk drives. A mirror set stores and
maintains the same (redundant) data on each of the two drives.
Since a mirror set is an independent access array, it supports
multiple simultaneous read and write operations.
drive is not used.
Figure A-5 Mirror set
Free Space (2 GB)
Mirror Set A
4 GB
4 GB
Drive A
4 GB
Drive A (Redundant)
4 GB
Blocks 1, 2, 3, ...
4 GB
Blocks 1, 2, 3, ...