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Dvr Backup And Restore Software for Windows (DvrBARS)

Discussion in 'TiVo Upgrade Center' started by ggieseke, Apr 13, 2013.

  1. Jan 15, 2014 #401 of 1472
    avunc

    avunc New Member

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    Hi ggieseke,

    I can't PM you (too few posts for this forum), but I was hoping you could PM me with how to access an image of a Tivo Premiere XL.
     
  2. Jan 16, 2014 #402 of 1472
    ggieseke

    ggieseke Active Member

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    May 30, 2008
    PM sent.
     
  3. Jan 16, 2014 #403 of 1472
    joebrod

    joebrod New Member

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    Sep 25, 2005
    Burbank, CA
    I was refered to this thread.

    I have a failed (previously merged with expander) OEM 320GB drive for a Premiere TCD746320. Not interested in trying to clone this drive just want to install a fresh 2TB.

    I did it once before with my S3 box years ago so I'm game to give it a try. I'm told I need an image. Is there someone who could PM me one?
     
  4. Jan 16, 2014 #404 of 1472
    avunc

    avunc New Member

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    Aug 5, 2004
    Great, thanks much. I got it down and put it on disk no problem at all. Am keeping it in reserve to see how my rescued disk will do.
     
  5. Jan 16, 2014 #405 of 1472
    ThAbtO

    ThAbtO TiVoholic by the bay

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    SF Bay Area
    You cannot just put a BLANK new drive into a Tivo and expect it to work (except for the Roamio.) It needs an image for the right model.
     
  6. Jan 17, 2014 #406 of 1472
    joebrod

    joebrod New Member

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    Sep 25, 2005
    Burbank, CA

    Is there someone who could PM me a link to an drive image for a Premiere TCD746320 that I could use on a new 2TB drive installed in that Tivo
     
  7. Jan 17, 2014 #407 of 1472
    ggieseke

    ggieseke Active Member

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    May 30, 2008
    PM sent.
     
  8. Jan 18, 2014 #408 of 1472
    dougdingle

    dougdingle HD Tech

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    Jul 4, 2007
    West Coast
    Really? How does the Roamio deal with that?
     
  9. Jan 18, 2014 #409 of 1472
    ThAbtO

    ThAbtO TiVoholic by the bay

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    Apr 6, 2000
    SF Bay Area
  10. Jan 18, 2014 #410 of 1472
    dougdingle

    dougdingle HD Tech

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    Jul 4, 2007
    West Coast
    Holy crap:eek:. I had no idea.

    Not wanting to read all 56 pages of that thread, can you summarize it?

    Will it take a 4TB drive?

    With the OS in flash, can you simply take a small drive with recordings, DDRescue or two-step DvrBARS it to a bigger drive, and have the box install what is needed and expand it?

    Have people found it to be much faster in terms of menus, guide, search, etc.?

    It's the next logical step, but kind of amazing nonetheless...:up:
     
  11. Jan 18, 2014 #411 of 1472
    jmbach

    jmbach der Neuerer

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    Jan 1, 2009
    Only WK can give it a 4TB drive at this time. Ggeiseke is working on the ability to do the same.
    Not sure about the copy and expand. In theory it should work but not sure if current tools can do this. It would be interesting if a person with a base Roamio copy their 500GB drive to a 1TB and see if JMFS can expand it and put it back in to see if it works.
    It is much faster from what I have read.

    Sent from my SPH-L710 using Tapatalk
     
  12. Jan 18, 2014 #412 of 1472
    lpwcomp

    lpwcomp Active Member

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    May 6, 2002
    John's...
    I doubt that JMFS would even recognize the drive as a TiVo drive.
     
  13. Jan 18, 2014 #413 of 1472
    jmbach

    jmbach der Neuerer

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    That maybe. Will only know if either someone tries or if someone with JAVA experience examines the code. I have no JAVA experience so I am learning OJT so to speak but I think it just might work. From my examination and testing of JMFS, it does not seems to care about anything other than the MFS partitions. All of those are created on the drive when the Roamio prepares it. So JMFS might be just fine with it.

    Sent from my SPH-L710 using Tapatalk
     
  14. Jan 18, 2014 #414 of 1472
    lpwcomp

    lpwcomp Active Member

    8,075
    2
    May 6, 2002
    John's...
    Not according to ggieseke. I'm fairly certain that he posted an analysis of a Roamio drive and the actual structure of the partitions is different.
     
  15. Jan 18, 2014 #415 of 1472
    jmbach

    jmbach der Neuerer

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    Yes it uses a different byte order apparently. Now whether JMFS can handle it, I don't know. There is an altered version of MFS tools that is modified to work on the S4 series. It does have some byte swapping code built into it. Using that, the user will have to manually coalesce the extended partitions if it works.
    I am not saying with certainty that it will work. I am saying it is worth a try. What is someone going to lose by trying. Nobody thought the S4s could be expanded beyond 2TB until someone tried it and succeeded.

    Sent from my SPH-L710 using Tapatalk
     
  16. Jan 18, 2014 #416 of 1472
    unitron

    unitron Active Member

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    Apr 28, 2006
    semi-coastal NC
    When you say "byte swapping", do you mean what the Series 1s had to do to accomodate their processor that read everything in wrong end first?
     
  17. Jan 19, 2014 #417 of 1472
    ggieseke

    ggieseke Active Member

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    It's not byte-swapping in the sense of a Series 1 where every two bytes were reversed. That's easy to handle by reading one or more whole sectors at a time and running swab (in C or C++) on the buffer.

    On Roamios Block0, the APM and all of the MFS headers use Intel byte order (least significant byte first) for all of the values whether they're 16, 32 or 64 bit. All of the older models used Motorola byte order (most significant byte first). It's harder to read when you're looking at a hex dump, but easier to deal with from a programming standpoint on most modern CPUs.

    A few fields in the MFS structures have also been moved around, so none of the existing tools like MFSLive will work correctly even if you rewrite them to compensate for the byte order.

    MFSLive, WinMFS, jmfs and DvrBARS won't even recognize a Roamio drive. I started to patch DvrBARS but since the VHD file format that it uses can only handle 2TB drives I scrapped that attempt and I'm starting over from scratch.
     
  18. Jan 19, 2014 #418 of 1472
    jmbach

    jmbach der Neuerer

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    Jan 1, 2009
    Ah I see clearer now. I really need to get a Roamio to delve into it more. Too bad etailz cancelled my order. Been concentrating more on getting a DIY 4TB premiere going than examining the Roamio.

    Would take a major rewrite then of JMFS to work on the Roamio. Of course to get JMFS to work on a 4TB drive for a Premiere will take some rewriting as well.

    Technically at this time, until the 64bit APM gets perfected, the Roamio can only go up to 4TB so you could split up the drive into two 2TB VHDs. Not sure what would be easier.
     
  19. Jan 19, 2014 #419 of 1472
    ggieseke

    ggieseke Active Member

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    May 30, 2008
    If it comes to that I'll probably treat each partition as a separate drive instead of trying to force the existing code into two VHDs, but either way there's a LOT of "out with the old and in with the new" involved. I wrote BARS with one goal in mind, and that was to be able to create a truncated image of a Premiere that would fit on a single-layer DVD or 4GB flash drive. Mission accomplished and the other features like Modified Full backups and S1-S3 support were gravy, but it will probably never exceed its current limitations.

    Roamios and Premieres over 2TB will need all-new tools. I'm working on it.
     
  20. Jan 22, 2014 #420 of 1472
    azdvr

    azdvr New Member

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    Jan 22, 2014
    I managed to screw up my first drive . It just shows a TiVo welcome screen than starts over . I have tcd746500 500gb drive. Any one have access to a vhd backup of it
     

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