Caching And Archiving Using The Hard Disk; Caching - HP J3278B - SureStore CD-ROM Server/Tower 7 NAS Server User Manual

8

Caching and Archiving Using the Hard Disk

Only for
The hard disk drive included with the HP J4150A SureStore
HP J4150A CD-ROM Server Plus is operated automatically for caching and
archiving CDs. Disc data that is cached on the hard drive will be
SureStore
used automatically to speed up user access when the disc in a
CD-ROM
physical CD-ROM drive is accessed. A disc that is archived on the
Server Plus
hard drive can be accessed without the disc being present in a
physical CD-ROM drive.
The location of the disc data on the hard drive rather than on a
CD-ROM drive is transparent to the users.

Caching

What is
Caching uses the hard drive to automatically copy disc data, to
Caching? increase access performance (speed) when a user accesses the disc.
(Caching aids in disc and file access; it does not affect data
throughput or network performance.)
When the disc is removed from the CD-ROM drive, the disc is no
longer accessible from the cache. As long as there is space available,
however, the cached data remains and will be used if the disc is
again inserted. The cached data is aged and deleted when the space
is needed for more frequently accessed files and for archives.
See also the section "Disk Space for Caching and Archiving" on
page 8-6.
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