How to restore LTO1 or 2 on LTO 3 Drive

For many reason, I re-post again about this issue; How to restore LTO1 or 2 on LTO 3 Drive…

The procedure is as follows:

  1. Inject the tape into the ACS library, then perform a robot inventory of the ACS library.

  2. After the volume database is updated, the RobotType of the media will change to “ACS” and the tapes should be recognized as “hcart”.

  3. Run “vmchange -new_mt <new density> -m <media ID>” to change the density. <new density> should be “hcart3” for the LTO Gen-3 drive and <media ID> refers to the media barcode. An eg would be “vmchange -new_mt hcart3 -m dx0333”

  4. Run “vmquery -m <mediaID>” to check that the density have been updated to “hcart3” from “hcart”.

  5. Run “bpmedia -changeden -new <density> -ev <mediaID>”

  6. eg “bpmedia -changeden -new hcart3 -ev dx0333” Note: This command will take some time to complete. Please be patient and let it complete on it’s own. If terminated halfway, strange things may occur later.

  7. Run “bpmedialist -m <mediaID>” to check that the density have been updated.

  8. Run the normal restoration procedure to restore the data from the LTO Gen1 tapes using the ACS library.

  9. Once, we have completed the restoration, the tape should be ejected from the ACS library to prevent it from being used for future backups. If necessary, will need to execute the commands in Step 3 and 5 to change the density back to “hcart”.