Topic
7 replies Latest Post - ‏2012-09-19T09:35:42Z by FPLAZAVI
FPLAZAVI
FPLAZAVI
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Pinned topic VTL FALCONSTOR

‏2012-09-14T10:24:07Z |
Hi all,

Anybody uses VTL Falconstor for tapes on i?

We want change the block Size when create a tape ...

Any idea?

Fernando
Updated on 2012-09-19T09:35:42Z at 2012-09-19T09:35:42Z by FPLAZAVI
  • SystemAdmin
    SystemAdmin
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    Re: VTL FALCONSTOR

    ‏2012-09-14T14:44:55Z  in response to FPLAZAVI
    Hi Fernando, what block size do you use now and what do you want it to be?

    The block size on saves is controlled by the type of drive you are using or emulating.
    On the IBM i, you can specify the 'Use Optimum block' (USEOPTBLK) parameter. If *YES is specified, it will use the maximum block size the tape drive can use. Most newer tape drives use a block size of 256K. When you specify *NO, it will change the block size to 32K. Those are the only 2 choices

    Here's the help text for the parameter :

    *YES
    The optimum block size supported by the device is used
    for Save commands. If the block size that is used is
    larger than a block size that is supported by all
    device types, then:

    o Performance may improve.

    o The tape file that is created is only compatible
    with a device that supports the block size used.
    Commands such as Duplicate Tape (DUPTAP) do not
    duplicate files unless the files are being
    duplicated to a device which supports the same
    block size that was used.

    o The value for the DTACPR parameter is ignored.

    *NO
    The optimum block size supported by the device is not
    used. Save commands use the default block size
    supported by all device types. The tape volume can be
    duplicated to any media format using the Duplicate
    Tape (DUPTAP) command.
    Here's the block sizes different tape drives use. The Falconstore is not listed but it depends on the drive you are emulating

    Tape Drive Model Format/Density Uses Optimum Block Maximum Optimum Block Size
    MLR3 - 25GB *MLR3 Yes 256K
    SLR60 *SLR60 Yes 256K
    SLR100 - 50GB *SLR100 Yes 256K
    Model 3590 *FMT3590 Yes 256K
    Model 3590E *FMT3590E Yes 256K
    Model 3590H *FMT3590H Yes 256K
    Model 3570-Bxx *FMT3570 Yes 256K
    Model 3570-Cxx *FMT3570E Yes 256K
    Model 3592 J1A *FMT3592A1 Yes 256K
    Model 3592 E05 *FMT3592A1/A2 Yes 256K
    Model 3592 E06 *FMT3592A2/A3 Yes 256K
    Model 3592 E07) *FMT3592A3/A4 Yes 256K
    LTO 1/2/3/4/5 *ULTRIUM1/2/3/4/5 Yes 256K
    ProtecTIER *ULTRIUM3 Yes 256K
    3490 F-18 track *FMT3480 Yes 64K
    3490 F-36 track *FMT3490E Yes 256K
    7208 Model 342 *FMT20GB Yes 240K
    7208 Model 345 *FMT60GB Yes 240K
    VXA-2 *VXA2 Yes 240K
    VXA-3 *VXA2/3 Yes 240K
    Dat 72 - 4mm *DAT72 Yes 256K
    Thanks Mervyn
    • FPLAZAVI
      FPLAZAVI
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      Re: VTL FALCONSTOR

      ‏2012-09-17T07:40:40Z  in response to SystemAdmin
      HI Mervyn ....

      Our problem is that we don't manage the configuration on the FlaconStor side ...

      We change from POWER6 to POWER7 ... V6R1M1 ... new HW FC from 4 to 8 Gb ... and our tape drives are slow ... I can see on Iseries Navigator -configuration & service - tape resources ...propierties on Capabilities that the block size is 32768 and the save is make with USEOPTBLK *yes ...

      Any idea ...

      Can we do something on iseries side for optimize this backups?

      Fernando
  • SystemAdmin
    SystemAdmin
    353 Posts
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    Re: VTL FALCONSTOR

    ‏2012-09-17T17:42:14Z  in response to FPLAZAVI
    Hi Fernando, the first problem I see is that the Falconstor is not supported on Power 7 hardware. Power 7 only uses IOPless IOAs and if you look at the following URL, you will see that the Falconstor is not listed as supported ( It also goes out of service in March 2013)

    https://www.ibm.com/developerworks/ibmi/media

    I would suggest making sure you have all these PTFs applied and then test

    MF54231 and MF52471 (or superseding PTFs) and MF49848, MF52325, MF52423, MF52653, MF54265, MF54671, MF55016, MF55017, MF55018, MF55032, MF55406, MF55407 and MF55408.

    The smaller block size is what is causing the backups to be slow

    Thanks
    Mervyn
    • FPLAZAVI
      FPLAZAVI
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      Re: VTL FALCONSTOR

      ‏2012-09-18T07:16:27Z  in response to SystemAdmin
      Hi Mervin,

      We had opened a PMR and IBM don't tell us nothing about Falconstor is not supported on POWER7 ...

      Fernando
      • SystemAdmin
        SystemAdmin
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        Re: VTL FALCONSTOR

        ‏2012-09-18T15:18:35Z  in response to FPLAZAVI
        Hi Fernando, sorry about that....
        .
        Looking at the PMR, this is not a IBM Falconstor but Sun. I think they need to verify that the tape drives are emulating 3580's correctly. It does not look like they are.

        Thanks
        Mervyn
        • FPLAZAVI
          FPLAZAVI
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          Re: VTL FALCONSTOR

          ‏2012-09-19T06:41:39Z  in response to SystemAdmin
          Don't worry Mervyn, Yes we must ask SUN to confirm the compatibility ...

          I will keep you informed ;-)

          Fernando
          • FPLAZAVI
            FPLAZAVI
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            Re: VTL FALCONSTOR

            ‏2012-09-19T09:35:42Z  in response to FPLAZAVI
            Hi Mervyn ... finally the problem was that the version of VTL is low ...

            Thanks a lot ...

            Fernando