Quantum Pathlight VX Guide de l'utilisateur Page 115

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Pathlight VX User’s Guide 109
Defining Policy Parameters: Policy parameters based on user requirements for specific data sets.
# of Copies - This parameter is configured based on concerns about physical media. While tape
has a low risk of media errors, a user may want to make multiple copies of virtual media to
protect against physical media failures. If multiple copies are created, they will always be
created on separate physical media so the loss of a single tape does not result in total data loss.
This parameter can be set from 1 to 4.
Media Count - This parameter is configured based on the number of barcodes associated with
a selected storage policy.
Minutes Before Copy - This parameter is configured based on how long a virtual media (tape)
must be idle before the backup application is done using it. For example, if a tape is used for
multiple backup jobs, but it might be unloaded between jobs, then the Time Until Copy
parameter should be set to 30 or so minutes. If a tape is usually filled during a single job, or only
used for a single job, the idle time could be very low. For virtual media that does not need to be
copied to physical media (tape), check the box to set this parameter to 'Never'.
Virtual Media on Disk - This parameter is configured based on whether data should ever be
removed from disk. If data should always reside on disk, check the box to set this parameter to
Never Remove. If data should be removed from disk when the disk threshold (watermark) is
reached, do not check the box.
Note
The Virtual Media on Disk parameter does not actually remove virtual
media from disk once the residency period is met: it makes virtual media
a candidate for removal. Actual removal of data from disk only occurs
when the disk fills to over 85% of capacity. To determine if a virtual media
is still on disk, look at the On Disk parameter of the Viewing the Virtual
Media Summary Report on page 119.
Note
You can only manage storage policies if you are licensed for this
Advanced Feature and it has been enabled on the Pathlight VX. For more
information, refer to Enabling Advanced Features
on page 103.
Note
Once a storage policy has been created, it can only be modified. Storage
policies cannot be deleted.
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