<DRB1239>
36
Hard Disk Caching
Caching Settings
To specify the settings, follow these steps:
1. Start your Web browser
2. Enter the name or Internet address of your DRM-6NX
in the location/address field
3. Click
Administration
The Network Cache Changer DRN-6NX has
hard disk
for caching
which means that discs in the Changer
may be copied to a hard disk drive. The caching system
involves directory caching and complete mirroring.
It allows the networked discs to run at hard disk speed.
The DRM-6NX Changer also supports hard disk caching
for externally connected CD/DVD-ROM drives. See page 10.
Disc Changers
Because of the relatively long time needed to change
discs in a disc changer, the data transfer rate may
become unacceptably low when two users
simultaneously attempt to read different discs. Hard
disk caching significantly increases the access speed
if you are using changers.
Persistent Use
The hard disk caching facility allows you to make the
cached discs persistent, (i.e. allow users to access the
copies even if the original discs are ejected from the
drives). Persistent discs that are currently not inserted
will always remain cached on the hard disk. This means
that if the hard disk becomes full, the DRM-6NX does
not overwrite data which is no longer available on to
an inserted disc.
Capacity
The number of discs that can be cached depends on the
size of the hard disk as well as the size of the individual
discs. For example, a 4.3 Gbyte hard disk allows six 650
Mbyte CD-ROMs to be cached. However, if each disc
contains only 100 Mbyte, about 40 discs can be cached
on the hard disk.
NOTE:
7
This product does not support cachingDVD discs.
Managing Hard Disk Caching
You manage the hard disk caching facility via the DRM-
6NX web interface.
6. Specify caching level:
None –
No caching
Normal –
Only the directory structure will be cached
on new CDs
Mirror –
Complete caching ; the hard disk contains a
complete copy of the mirrored disc. This method
allows faster user access, but takes more time
to complete when a new disc is inserted. If the
disc drives are frequently changed then automatic
mirroring is not recommended.
As it takes between 2 and 20 minutes to copy one
CD-ROM, performance decreases if the DRM-6NX
is constantly busy copying discs to a hard disk drive.
Persistent –
Complete caching
The persistent disc will be accessible to the users
even if the original disc is ejected from the drive.
NOTES:
7
You can change the default settings for particular discs later on the
Discs & Drives
page.
7
If an access request is received from the network while the DRM-
6NX is caching (copying discs to the hard disk), the network
request is given priority, to allow data transmission to take place.
During this time, the caching is interrupted, and resumes about
one minute after complection of the network access.
7
The caching level of factory default is
Mirror
.
If you want to set the normal caching mode, you have to change
the caching level before you insert the magazine.
7.Click
Set
then click
Close
to exit the setup menu
4. Click
Edit
on the
This sever
page (The
Server
Settings
dialog box appears)
5
.
Open the
Caching
page
