| Data
files recorded by Embla take up a large
amount of space. It is therefore not feasible
to keep recordings on an acquisition workstation
for more than a few weeks.
The
solution is to move recordings to long
term high capacity storage (archive).
Somnologica supports archiving to any
media that can be accessed as a drive
from Microsoft Windows. Do the following
to set the Archiving location:
Select
"Options..." from the Tools
menu
Select the "Data storage" tab
Check "Allow Archiving to a special
folder"
Set the "Archive data storage location"
to your archiving drive.
When
the Archiving location has been set, a
recording can be archived by right-clicking
on the recording icon in the Recording
Organizer and selecting "Archive
Recording".
There
are three basic alternatives for archiving
methods and media. Within each category
there are different options to consider.
Remember that a standard polysomnographic
study usually takes from 50 to 100 MB.
CD
ROM
Writable (CD-R) or rewritable (CD-RW)
CDs are by far the most common and convenient
archiving media to use with Somnologica.
Each CD holds up to 650 MB (up to 10 studies
or more) and they are both cheap and easy
to obtain. CDs are durable with a shelf
life of up to 30 years and are likely
to be accessable for the forseable future.
Data can be read on any standard PC without
any special software. DVDs are a new form
of CDs with higher capacity per disk.
Removable
disks
Another option is archiving to removable
magnetic disks such as Zip or Jaz. These
disks are convenient, but the high price
of media and relatively short shelf live
of data make them unattractive in the
long term. Also, special drives are needed
to retrieve data. Capacity ranges from
100 MB to 2 GB per disk.
Magnetic
Tape
The final category is the magnetic tape.
These tapes are commonly used for backing
up large amounts of data from specialized
file servers. Special drives and software
are needed to retrieve the data. Data
can not be accessed directly from the
tape. The tapes are slightly more expensive
than CDs but the shelf life is much shorter.
This solution only makes sense for locations
with a high capacity file server for short
term archiving and tapes for long term
off-line storage. Capacity ranges from
4 Gb to 80 Gb per tape.
|
Archiving 