Section 10: Hard Disk Caching
AXIS StorPoint CD E100 User’s Manual
97
Caching Options
Hard disk caching with the
StorPoint CD
has two main purposes:
•
Increasing performance
•
Archiving discs on the hard disk
Performance Caching
For performance caching, you specify the cache mode on the
This StorPoint |
Server Settings | Caching
page. These options are available:
•
None
- The disc will not be cached.
•
Partial
- Information about the directory structure and files are cached on to
the hard disk, but no actual data. This speeds up the directory browsing,
especially with the use of disc changers. Optionally select how much space
to allocate to file caching. The file cache is a separated part on a hard disk
where disc files may be cached. The more hard disk space allocated to file
caching, the larger files can be stored in the file cache.
•
Mirror
- A copy of the disc is created on the hard disk, and thus increasing
performance, especially with multiple users or frequent access of multiple
files. This method takes more time to carry out when a new disc is inserted.
The mirroring will be performed in the background. Until a disc has been
completely cached on the hard disk, the disc will be accessible from the disc
drive. If there is not enough room on the hard disk to mirror all required
discs, it is advisable to only mirror the most frequently used discs and enable
the file cache. The most frequently used non-mirrored disc files will then be
placed in the file cache. The file caching option is only available for Partial
caching.
For more information, see “
Using Hard Disk Caching for Increased Performance
”
on page 99.
Archiving Discs
The archiving option is only available from the
Discs & Drives
page:
•
Archive
- This option does the same as Mirror and in addition makes the
created image persistent on the hard disk. The archived disc will be
accessible to the users even if the original disc has been ejected from the
drive. Archiving can be performed manually or automatically for one or
more drives.
For more information, see “
Using Hard Disk Caching for Archiving Discs
” on
page 100.
