The general information about a media, including the barcode, unique ID for
the media in the CommCell, the current library, last written library, location
in the library (slot number, or if mounted on a drive, the drive number), export
location if the media is exported, the previous export location if the media was
previously exported, the storage policy and storage policy copy accessing the
media, the stream number (of the storage policy) that was used to write to the
media and the CommCell ID are displayed.
The general information about a media can be viewed from the
General tab of
the Media Properties dialog box. |
The general information about a media, including the recording format, the
media type, discovery date and time, whether the media is required for auxiliary
Copy, whether the media is appendable or not, export date and time (if
exported), and the condition of the media and the data and time on which it was
marked as prevent export, if the media was marked as prevent export is
displayed.
The media information can be viewed from the Media Info tab of
the Media Properties dialog box.
See View the Condition of a Media for
step-by-instructions.
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The media information about a media, including information about the amount
of data stored in the media and the usage information. The usage information is
used to compare against the thresholds established for the media.
Information about the specific media can be viewed from tab that displays the
unique ID of the media in the Media Properties dialog box. For optical media,
two tabs representing the sides of the media the will be displayed. You can also
view information on the data available in the media by clicking the
Show Data Information button.
The media is cycled through the following stages:
- When new media is imported and discovered in a library, it is assigned
to a scratch pool.
- When a job requires a media, a media is logically reassigned to the
Assigned Media pool.
- Subsequent jobs write data into the media until it is full. At this
point, although the media cannot be written to, it remains in the Assigned
Media pool, available for restore operations.
- When all of the data on the media exceeds its retention criteria and is
pruned, the system returns the media to a scratch pool for reuse.
- Occasionally, a job may encounter hardware or software errors while
attempting to write to or read from a media. In these cases, the system may
mark the affected media as BAD so that the problem can be diagnosed and, if
possible, fixed. (For additional information on scratch pools, see
Master Drive Pools, Drive Pools and Drives.)
Status information about individual media is provided in the CommCell
Console. Note that if a media is double-sided (e.g., an optical disk), each side
has its own status. The table that follows lists the various media status with a
brief description of each status:
Active |
The media is available for writing. In
other words, when data is sent to the storage policy copy associated
with the media group containing this media, the data is written to this
media. |
Full |
The MediaAgent can no longer write to this
media, either because it contains no free space or because the media has
been marked as full, either by the user or by the MediaAgent. The
MediaAgent will mark a media full if it is unavailable for a data
protection operation. However, the media will remain in the Assigned
Media pool as it contains un-pruned data. (See
Mark a Media Full
for step-by-step instructions on marking media volumes full, .) |
Idle |
This media belongs to a scratch pool rather
than to the Assigned Media pool. New media should have
Idle status after they are imported and
discovered. |
Read Only |
The MediaAgent may mark a media as
Read Only when an error is encountered while
attempting to write to the media. Although data cannot be written to a
Read Only media, it will be possible to restore data from the
media. |
Bad |
The MediaAgent can no longer read from nor
write to this media. Media with Bad
status will be moved to the
Retired Media pool after it is recycled. |
Appendable |
An Appendable media typically has room left
on it. The MediaAgent can write to this media, if the Mark Media
Appendable option and
Use Appendable Media for (n) Days option are enabled in the
Media tab of Library Properties.
(For more information on this option, see
Library Properties.)
Media is marked as Appendable in the following situations:
- When a media is found to be exported by a data protection or Auxiliary
Copy job.
- When a media is stuck in a drive, by a data protection or Auxiliary Copy
job.
- If the number of streams are reduced for a Storage Policy copy.
- If the Start New Media option is enabled
for a backup from the
Advanced Backup Options dialog box.
- If the Start New Media option is enabled
for an auxiliary copy job from the Auxiliary Copy
dialog box.
- Marked as full by the job to perform a LAN free data protection
operation.
- If an alternate data path is used in a Storage Policy Copy.
- Marked as full by the user.
- Marked as Full to create a Synthetic Full.
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