
Pathlight VX User’s Guide 105
• If Storage Policies is selected:
a. Decide whether you want to create an application window to suspend storage policies on the
Pathlight VX.
• If you want to create an application window, specify values in the Enter Start Time, Enter
End Time, and Select Days parameters and click Next.
• If you do not want to create an application window, check the No Application Window box
and click Next.
The Add Unknown Media to Disk Extension Media Pool screen appears and lists unknown
media that are available to add as Disk Extension media and use for storage policies. For each
media, its barcode and media type are listed.
b. Select one or more media to add as Disk Extension media.
• To select one or more media, check the box next to each media’s barcode.
• To select all media, check the box next to Barcode.
c. Click Next.
The Modify Default Storage Policy - default policy screen appears and lists the default
storage policy. The following parameters can be modified.
• Copies to Disk Extension Pool - The number of physical copies of virtual media to be
created. Multiple copies of virtual media protects against physical media failures. If multiple
copies are created, each copy is created on separate physical media so the loss of one
tape does not result in total data loss. This parameter can be set from 1 to 4.
• Minutes Before Copy - The number of minutes that virtual media must be idle before the
Pathlight VX backup application is done using it. For example, if media is used for multiple
backup jobs, but it might be unloaded between jobs, then this parameter should be set to
30 minutes. If the media is usually filled during a single job or is only used for a single job,
then this parameter should be set to a low value. For virtual media that does not need to be
copied to physical media (tape), check the Never Copy box.
• Virtual Media on Disk - Specifies whether data should ever be removed from the Pathlight
VX disk. If data should always reside on disk, check the Never Remove box. If data should
be removed from disk when the disk threshold (watermark) is reached, do not check this
box.
Note
Data removal from disk only occurs when the disk fills to more than
85% capacity. When this internal threshold is reached, Pathlight VX
clears out virtual media until the disk usage falls to less than 75% of
capacity. To determine if specific virtual media is still on disk, refer to
the On Disk parameter of the Detail Media Report, accessed from
the Virtual Media Summary Report. Refer to Viewing the Virtual
Media Summary Report on page 119.
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