Copy Tape to tape copy

Hi Alvian,

To some extent that is true if disk has deduplication. Because not all the data is written and for tape we have to write all the data.

Also tape speed depends on the hardware, to understand the speeds on the tape library, you can ran drive validation.

Procedure

1. From the navigation pane, go to Storage >Tape.

   The Tape page appears.

2. Click the tape_storage for which the drive has to be validated.

   The tape_storage page appears.

3. Under the Drives section, for the associated drive that has to be validated, click the Actions button  and then click Validate.

   The Validate Drive dialog box is displayed.

4. In the MediaAgent box, select the MediaAgent that must be used to perform the validation.

5. In the Drive pool box, select the drive pool that must be used to perform the validation.

6. in the Volume block size(KB) box, select the media bock size that must be used by the validation operation to write data on the media.

7. In the Chunk size box, select the chunk size that must be used by the validation operation to create a block.

8. In the Amount to Write options, choose one of the following options to write data chunks:

   • Select the Write chunks to end of media option to specify that the validation operation must write chunks to the end of the volume.

   • Select the Write the specific number of chunks option to specify that the validation operation must write only the specified number of chunks.

9. Click OK.

ref: Validating a Drive (commvault.com)