bplabel: What is difference between "dlt" and "dlt2"density? - Veritas Net Backup

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Thread: bplabel: What is difference between "dlt" and "dlt2"density?

  1. bplabel: What is difference between "dlt" and "dlt2"density?


    Another undocumented NBU mystery:

    When using Netbackup with a DLT tape drive in Solaris,
    what is the difference
    between the density parameters "dlt" and "dlt2" in the
    bplabel command?
    Which density parameter is correct? Assume Solaris 2.7
    and a DLT tape
    device "/dev/rmt/0ubn".

    bplabel -ev 000000 -d dlt
    vs
    bplabel -ev 000000 -d dlt2

    TIA,

    -wsanders


  2. Re: bplabel: What is difference between "dlt" and "dlt2" density?

    The tape cartridge definition has to the drive definition, if the
    drive type is set to DLT3 in Media and Device Manager, then the tapes
    associated with that drive must also be set to DLT3. This is to issue that
    the proper style, not density of tape is used with the proper drive. The
    DLT, DLT2, DLT3 do not set the density of the tape. They are used to set
    the maximum throughtput of the drive itself.

    DLT, DLT2, DLT3 defintions are for if your robot has mixed drive types
    (DLT4000 and DLT7000). This allows you manage the tape usage for each drive.
    If you had DLT4000 defined as DLT and a DLT7000 defined as DLT2, you could
    force NetBackup to use the DLT IV cartridges only in the DLT7000 by setting
    the DLT IV cartridges to a type of DLT2. The DLT4000 could only use tapes
    defined as DLT.




    Wiley Sanders wrote in message
    news:3A525074.3E14F4E5@NOwsandersSPAM.net...
    >
    > Another undocumented NBU mystery:
    >
    > When using Netbackup with a DLT tape drive in Solaris,
    > what is the difference
    > between the density parameters "dlt" and "dlt2" in the
    > bplabel command?
    > Which density parameter is correct? Assume Solaris 2.7
    > and a DLT tape
    > device "/dev/rmt/0ubn".
    >
    > bplabel -ev 000000 -d dlt
    > vs
    > bplabel -ev 000000 -d dlt2
    >
    > TIA,
    >
    > -wsanders
    >




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