none
DPM 2012 Tape Backup - Expired Tapes reuse issue RRS feed

  • Question

  • Hello,

    We have DPM 2012 with short-term and long-term recovery goals.

    Our retention policy is as follows:

    - Protection Groups of same retention policies to be co-located on the same tape

    - A daily backup should happen for all days of the week except on Saturdays where we do a Weekly backup

    - A monthly backup to occur on the last day of each month

    - We want to make use of the same tapes used in the daily backup of the first week for the days in the second week by expiring them and reusing them

    In total, we would require 7 tapes for the daily backup, 4 tapes for the weekly, and 12 tapes for the monthly and did setup the recovery goals accordingly as shown in the screenshots below:

    Recovery Goals

    Tape Optimization Setup

    We then tried backing up on a daily basis using new tapes for each day, and after 7 days, the tapes expired as per our setup. We are now facing an issue related to re-using the expired tapes where DPM is not able to re-use them automatically and generates the following alert for expired tapes that are being loaded for re-use:

    Event Description: The back up to tape job failed for the following reason: (ID 3311)

    Event Details:

    The tape in Tape Library IBM TotalStorage 3576 Modular Tape Library at Drive IBM ULTRIUM III 3580 TAPE DRIVE has been written to by another tape backup application using an unsupported physical block size. DPM supports a physical block of 65536 bytes for writing and a physical block size ranging from 1024 bytes to 65536 bytes for reading. So DPM will not be able to read or overwrite the contents of this tape. (ID 24084 Details: When accessing a new tape of a multivolume partition, the current block size is incorrect (0x80070452))

    Go to the Libraries tab in the Management pane, select the tape, and click on Erase tape to erase the content of this tape. After erasing this tape, DPM will be able to use it for backups.

    To note that these tapes were not written on by another backup application since they are new.

    Thanking you in advance.

    Saturday, June 23, 2012 9:23 AM

All replies

  • Hi,

    Can you do a restore from these tapes ?  

    Download and run this utility and see if the tape library certification test shows anything strange when reading / writing to one of those tapes.

    http://cid-885774776d4f197a.office.live.com/self.aspx/Public/DPMTapeLibraryCompatibilityCheckerTool-Beta.zip

    If you erase the tape as suggested, does that allow the tapes to be reused ?


    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Regards, Mike J. [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.

    Saturday, June 23, 2012 8:25 PM
    Moderator
  • Hi Mike, thank you for your support.

    Kindly note that we are in the process of testing restore from expired tapes, and trying DPMEraseTape to erase the tapes.

    Meanwhile, please find the output of the DPMTapeLibraryCompatibilityCheckerTool with all tests except cleaning:

    DPM Library Detection Test ...Succeeded

    Running DPM Mount/Dismount Test ...Succeeded

    Running Inject/Eject Test ...Failed
    Error Code: 0x8099900d, Error Message: I/E port reported as open before moving t
    ape medium to I/E port. Make sure I/E port is closed and rerun the tool.

    Running Read/Write Test ...Succeeded

    Result: 3 tests completed successfully, 1 failed


    Update 1: Tried restoring from an expired tape, DPM has now marked the tape as 'Unrecognized' and the following error appeared (to note that non-expired tapes allow successful restore):

    Unexpected tape detected in Drive IBM ULTRIUM III 3580 TAPE DRIVE in Tape Library IBM TotalStorage 3576 Modular Tape Library (ID 24061)


    Update 2: Tried erasing tapes from mytape.exe, but only short erase works. Selecting long erase gives the following error:

    \\.\Tape0>TapeConsole_1.0>erasetape s
    Short erase / Long Erase [s/l]:Status: Erasing the tape...Success

    \\.\Tape0>TapeConsole_1.0>erasetape l
    Short erase / Long Erase [s/l]:Status: Erasing the tape...Failed
    Error_Id reported: 23



    Monday, June 25, 2012 9:21 AM
  • Hi,

    Interesting, the long erase reported error 23 = Data error (cyclic redundancy check)

    You may want to try using the Mytape.exe Writeforspanning, then readtillend commands and see if you get any errors.


    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Regards, Mike J. [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.

    Monday, June 25, 2012 9:39 PM
    Moderator
  • \\.\Tape0>TapeConsole_1.0>Writeforspanning

    Status: Writing onto tape...Failed !!!
    Error_ID reported: 23
    Number of bytes written: 0
    Giving up
    Time taken: 2269362ms
    Wednesday, June 27, 2012 5:51 AM
  • Hi,

    C:\>net helpmsg 23

    Data error (cyclic redundancy check).

    Botta-Bing, Botta-Bang, perhaps dirty / bad drive or tapes.


    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Regards, Mike J. [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.

    Wednesday, June 27, 2012 4:59 PM
    Moderator