Using tapes (Tape Drives) in DPM 2010 – Part II
In this second post will discuss how to work with the tape drive and manage the tapes in DPM 2010. In the first post we discussed the work (Permanent Link to Using tapes (Tape Drive) in DPM 2010 – Part I)
Managing tapes in DPM is relatively simple, but important for the activities, especially when we talk about co-location robots with enabled.
Initially, in the image below we see a robo the TL2000 tape, Dell uses the IBM 3573 drive.
Note that we have a tape drive and a carrosel of 24 slots (the first is loaded in the drive) and each tape has a barcode and label indicating their use.
- Status – Obviously indicates if the tape is free or available. It is important that this field only shows if the tape is empty, available for use or damaged, but the State available (Tape available) does not indicate that the tape is free or empty, just that the tape is not with problems
- Tape Label – DPM uses this field to indicate what is inside the tape, in the case using the name of the protection group plus a sequential visual code as indicative for the backup administrator. Free State obviously indicates that the tape does not contain data or they have expired, according to the retention policy long-term of the protection group
- Barcode – Single indicator of each tape, the barcode allows you to identify the tape, but not affinity it, which is a limitation of DPM that many criticise, but it is important to note that DPM himself manages this automatically, primarily in robots
- Offisite Ready – Indicates that the tape is with the backup. In cases co-location that is enabled and there is the robo this data may not be available for letting the tape the hopes of other backups, however in the case of tape drives without robo this data would indicate that the tape has already been used for the backup and that should be taken, and when co-locationthe is enabled the tape already is full and cannot continue to use it
What is the Co-location?
This option allows the DPM better use tapes by combining backups. For example, an LTO-3 tape can be 800 GB and up data use only 200 GB, so the rest of the tape contains other backup sets and otimizariamos the need for more tapes.
To activate open DPM Management Shell and use the command:
Set-DPMGlobalProperty – <Servidor>-DPMServerName OptimizeTapeUsage $ True
When using the Co-location?
Where no robot, only the tape drive, this option will help you by allowing a same tape contains multiple backup.
On the other side the co-location can disrupt when a backup is not expired and the tape becomes full. For example, imagine that the same tape archived file server backup and SQL Server by 3 retention cycles (1 month with backups every 7 days). This tape filled and like the first two backups are expired but the last round, the tape is not free and cannot be reused until the third expires.
On the other hand, if you have this robo uses the tape to the end with multiple backup sets and skips to the next tape at the end.
Operations with Tape
The menu below lists the options that can be used with tapes:
- Inventory Library –This option makes the reading of all the tapes in the carrousel or tape in the drive if unico. In cases where a tape appears in the alerts as “suspect” or “unreadable” this option solves the problem by reinventaria all tapes
- Refresh and Rescan – Used for DPM to recognize new tape drives (tape drives)
- Clean Drive – Ask the cleaning tape drive
- Remove and Add Tape (I/E port) – Open the gate of the tape for removal or place new tapes
- View Tape Contents – returns the tape catalog, with backups that it contains and the expiration date
- Erase Tape -Deletes data from a tape, util when she still contains data that have not expired
- Mark the Cleaning Tape and Unmark Tape as Free – these options indicate that the tape is free or not, being that in the latter case is useful for when you want to permanently save the backup
With this second post we saw how to administer the tapes, in the third and last we’ll see how to create backup policies.
Read the first part in Permanent Link to Using tapes (Tape Drive) in DPM 2010 – Part I
Read the third part in https://msincic.wordpress.com/2011/07/21/using-tapes-in-dpm-2010-part-iii/