Symantec Backup Exec

Hours in use

Displays the total number of hours that this media has been in use.

Used capacity

Displays the amount of raw capacity on the media that has been used. Used capacity is calculated by subtracting available capacity from total capacity.

Used capacity may or may not equal bytes written.

Available capacity

Displays the amount of expected raw capacity on the media that remains unused. Some tape devices support the ability to read the amount of remaining capacity of the media that is currently loaded in the device. If a tape device supports reading of the remaining capacity amount, then available capacity is derived from the remaining capacity amount. Otherwise, available capacity is calculated by subtracting bytes written from total capacity.

Because free space is reported in terms of unused raw capacity, review bytes written and compression ratio to better estimate if there is enough free space to accommodate a specific job.

Total capacity

Displays the amount of expected total raw capacity of the media. Some tape devices support the ability to read the amount of total capacity of the media that is currently loaded in the device. If a tape device supports reading of the total capacity amount, then total capacity is derived from the total capacity amount. Otherwise, total capacity is estimated based on past usage of the media.

Compression ratio

Displays the ratio of bytes written to used capacity. Compression ratio will show the overall effect that data compression and media flaws are having on the amount of data that is being stored on the media.

Bytes written

Displays the amount of data that has been written into blocks on the media. Bytes written may differ from used capacity due to the effects of data compression and media flaws. Data compression will tend to increase bytes written when compared to used capacity. Media flaws will decrease bytes written when compared to used capacity.

Bytes read

Displays the number of bytes that have been read from this media.

Mounts

Displays the number of times this media has been mounted.

Seeks

Displays the total number of seek operations that have been performed on this media. Seek operations run to locate a specific piece of information on the media.

Seek errors

Displays the number of errors encountered while trying to locate data.

Soft write errors

Displays the number of recoverable write errors encountered. If you receive soft errors, it may indicate the beginning of a problem. If you receive excessive errors for your environment, check the media for damage.

Hard write errors

Displays the number of unrecoverable write errors encountered. If you receive hard errors, check the media for damage.

Soft read errors

Displays the number of recoverable read errors encountered. If you receive soft errors, it may indicate the beginning of a problem. If you receive excessive errors for your environment, check the media for damage.

Hard read errors

Displays the number of unrecoverable read errors encountered. If you receive hard errors, check the media for damage.