LTO-7 Format options: Default formated size is only 5,7 TB, have i manually set it to 15TB (DP 9.08)

Hi,

we just replaced our two HP Ultrium 4 Tape Drives to two newer Ultrium 7 15000 Tape Drives. - When we now format the new LTO 7 tapes with the "default size"-option in dataprotector 9.08, each tape is formatted automatically with 5,7 TB capacity ( 5722045 MB ).

Now my colleague suggests, we should format all tapes manually to 15TB capacity, because that is the compressed capacity the tape is considered for. - Is that the correct way how to reach the 15TB per tape, or is formatting the tapes with 5,7 TB already correct and we have to enable the compression elsewhere in data protector ? - I am not sure if manually format the lto 7 tapes to 15TB is the correct way...

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  • Hello,

    Hope to make a comment.

    When you format a media, you just initialize it to make it as a Data Protector Tape, which is basically information on the medium in the media header. This is why format a media will just be a few seconds.

     

    About Formatting Media
    Formatting (initializing) media prepares it for use with Data Protector by saving the information about the media (media IDs, description, and location) in the IDB and by writing this information on the medium (media header), also. When you format media, you also specify to which media pool it belongs.

     

    When to format media - You need to format media before you use them for backup. <===== you would normally do it only one time throughout the time you use a media but it is also possible to "re-format" an existing DP media.

     

    Upon formatting, Data Protector labels each medium with a unique media label and medium ID. Both are stored in the IDB and allow Data Protector to manage the medium. The media label is a combination of the user-defined description and the barcode of the medium (if the Use barcode as medium label on initialization option).

     

    Once you have formatted a medium, you cannot change the medium label and location written on the medium itself unless you format it again (which results in overwriting the data). Modifying medium properties only changes this information in the IDB.

     

    The tape will be used up to the very end and so it's capacity will be dependent on the drive (if it supports compression) and what type of tape you have..

    Hope this helps

    Rgds,

    Sherman

    HPE DP Support

Reply
  • Hello,

    Hope to make a comment.

    When you format a media, you just initialize it to make it as a Data Protector Tape, which is basically information on the medium in the media header. This is why format a media will just be a few seconds.

     

    About Formatting Media
    Formatting (initializing) media prepares it for use with Data Protector by saving the information about the media (media IDs, description, and location) in the IDB and by writing this information on the medium (media header), also. When you format media, you also specify to which media pool it belongs.

     

    When to format media - You need to format media before you use them for backup. <===== you would normally do it only one time throughout the time you use a media but it is also possible to "re-format" an existing DP media.

     

    Upon formatting, Data Protector labels each medium with a unique media label and medium ID. Both are stored in the IDB and allow Data Protector to manage the medium. The media label is a combination of the user-defined description and the barcode of the medium (if the Use barcode as medium label on initialization option).

     

    Once you have formatted a medium, you cannot change the medium label and location written on the medium itself unless you format it again (which results in overwriting the data). Modifying medium properties only changes this information in the IDB.

     

    The tape will be used up to the very end and so it's capacity will be dependent on the drive (if it supports compression) and what type of tape you have..

    Hope this helps

    Rgds,

    Sherman

    HPE DP Support

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