Chapter 11 - About archiving
11 About archiving
There are two reasons for archiving; to maintain sufficient file space to take new images and to provide a
backup in case the PC fails and the images need to be restored.
Each time you capture an image two copies are saved. The primary image (uncompressed) is stored in a
higher resolution format than the secondary file (compressed). Due to the higher resolution, the primary file
takes up a large amount of disk space.
The primary files are used for reviewing. The secondary files are used in thumbnails and when primary
images have been archived.
Caution
Your Optos representative will configure the Task Settings when the device is
installed. These settings should not be changed in the course of normal operation.
Please consult your Optos Representative before changing the Task Settings.
Your Optos representative will configure the Storage application to best suit the activity in your practice.
These configuration settings will define where archived files will be saved and when archived files will be
deleted from the system. Deleting archived files is necessary to clean out the space needed for new
images. The time set to retain images on the PC hard drive will depend upon your volume of imaging and
available capacity. The default settings of two weeks for primary (uncompressed) images and seven years
for secondary (compressed) images should be suitable for most cases.
When to Archive
When archiving to disk (CD or DVD) it is important to balance the risks involved in not backing up data with
the convenience of the practice. The recommended approach is to run an archive task when there is
sufficient data to fill a recordable disk media item. Since the Storage application should be run daily several
archiving approaches are available: CD for lower volume sites, DVD for average volume sites and network
for larger volume sites, see Archiving to disk on page 71.
It may occasionally be necessary to write two recordable disk media items rather than one. If the task is not
run daily, then it may be necessary to write multiple media items more often, and the hard disk is more
likely to become full.
When archiving to a NAS device
1
or network location ( see Archiving to a network on page 74.) you can
schedule the storage tasks to be run overnight, see Scheduling storage tasks on page 74. When archiving
to a network it is important to ensure that the network archive is backed up regularly.
Note
l
The Storage application should only be run from the computer that contains the image files and
database. Attempting to run the application where either the source or destination drives are on
different computers may result in frequent failures when archiving files.
l
The disk writer drive should be selected as the Archive Drive for both archive tasks or a network
location selected if the files will be archived on the network.
Changing the Archive Task Settings
Once files have been archived they can be removed from the hard disk to create space for new images.
Primary images are large and can quickly fill your hard disk. To create space for new images, while
keeping the image available, the system creates an additional lower resolution secondary image. When
you clean up the hard disk archived images within a defined time frame are removed. Typically, archived
primary images are removed after two weeks and archived secondary images are removed after seven
years.
You should always retrieve the archived primary image for diagnostic purposes.
1
A Network Attached Storage device is a hard disk, or Solid State Drive, that is attached to the network.
It has its own network address.
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