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4K drive problems

Discussion in 'TiVo Series3 HDTV DVRs' started by cuda74360, Jul 16, 2013.

  1. jmbach

    jmbach der Neuerer

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    Since you started out with a 1TB drive and you expanded the bootstrap partitions, what partition(s) did you short to get the extra space to expand the bootstrap partitions.

    A couple of things come to mind with your OP problem. One, the truncated backup could be damaged from the rebooting issue. Might try a backup from another source. The other might be capacitors that are going bad and need to be replaced. (That was my problem).

    One last thing. Some drive diagnostics program can/will 'recertify' a failing drive as it is testing it such that it may pass diagnostics again. See if you have a program that will check to see if a drive has been reassigning any sectors. There has to be enough reassigning of sectors for the SMART to trigger but the dynamic reallocation of sectors can also cause some of the same problems.
     
  2. cuda74360

    cuda74360 New Member

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    Partition #14, Apple_Free Extra, shrunk from 1390 to 1376.

    I restored the truncated backup to the original drive and it's been running great for the past 2 days. I don't think that backup is the issue.

    The capacitors are not bulging or leaking. Since it's working fine with the original drive, I'd guess that the capacitors are probably fine.

    I'll see what I can come up with.
     
  3. unitron

    unitron Active Member

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    semi-coastal NC
    Any reason for using the Series 1 "non-optimized" partition layout?
     
  4. jmbach

    jmbach der Neuerer

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    Interesting, did not realize that original HD XL drive had an apple_free partition at the end.
     
  5. nooneuknow

    nooneuknow TiVo User Since 2007

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    Cox Cable...
    DVR_DUDE's 2TB drives for the TCD746320 Premiere, and TCD652160 HD both have apple_free spaces on them as well.

    I wonder if there is a legitimate need for them...
     
  6. jmbach

    jmbach der Neuerer

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    Not really. I read in another post that the extra space came because they used a smaller swap partition when they image a drive. (64 instead of 128) In fact, one person had a replacement drive for their TiVo from one of them and JMFS expansion process was not recognized by the tivo until that apple_free partition was deleted and then jmfs expansion was performed. For TiVos that WinMFS and MFSLive work on, they recognize that the apple_free partition is really just free space and uses it to expand. JMFS does not and creates the expansion partition after the apple_free space (partition).
     
  7. nooneuknow

    nooneuknow TiVo User Since 2007

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    Cox Cable...
    Could the apple_free space, if not at the end of the drive, be used as a means to achieve 4K alignment (in partitions after the apple_free space)? Could you have multiple areas of apple_free space used as "spacers" to nudge alignment?

    I've been wondering this for a long time, and just now thought to post it.
     
  8. Worf

    Worf Active Member

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    Partially correct. XP left mainstream support on April 14, 2009. This means that XP will no longer get any feature updates at all. Right now, Microsoft is providing 5 extra years of "extended support" which means the only thing XP is getting is security updates.

    During mainstream support, it'll get feature improvements and security updates. After that phase passes, it's in extended support where there are no more feature improvements (including things like new IE versions and such) but it will still get security fixes.

    And that Apple_Free partition is leftover space that can't be used - it's not terribly big (about 768k or so), just the result of partitioning ending up with free space.

    I admit though, when I copied my TiVo drive to a new drive, I didn't bother realigning the partitions - the MFS data partition is written in such huge strips (1MB or so - about a second of video) that any performance loss due to the Read-Modify-Write will be minimal, if at all (because writes are cached, so if another write happens, it'll update the whole sector anyhow).

    Of course, the MFS application region is a bigger concern because the updates to it will be slower.

    Then again, the TiVo doesn't exactly demand a lot of performance from the hard drive...
     
  9. jmbach

    jmbach der Neuerer

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    That is a good use of the apple_free partition. However you don't need any apple_free partitions between partitions. The best approach is what was described in an earlier post. You can make the partitions bigger without causing problems, just cannot make them smaller. The extra space in the partitions is ignored.
     
  10. cuda74360

    cuda74360 New Member

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    The MFS Live CD's other way puts the MFS partitions at the end of the drive.

    The "optimized" way is what I chose, since it split the MFS partitions similarly to the way it was done on the factory drive.
     
  11. cuda74360

    cuda74360 New Member

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    Jul 12, 2013
    It didn't. That only showed up after restoring the truncated image from MFS Live. It worked though, as otherwise there was no free space to do the realignment.
     
  12. jmbach

    jmbach der Neuerer

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    Okay. Too bad we don't have a pdisk print out of the original partition structure to see what changed with MFSLive restore.
     
  13. cuda74360

    cuda74360 New Member

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    Jul 12, 2013
    I made a printout of the original pdisk output, but misplaced it.

    I'm not sure it matters though... as I tried a JMFS copy of the original drive to the new 4K drive and still experienced the same sluggish performance.

    The problems only occur with the 4K drive.
     
  14. jmbach

    jmbach der Neuerer

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    More for self education on how MFSLive works on a drive.

    Have you tried another 4k drive. Might be just the drive.
     
  15. cuda74360

    cuda74360 New Member

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    Jul 12, 2013
    Yes, you can. The Apple_Free partitions are just APM's way of marking free space.
     
  16. cuda74360

    cuda74360 New Member

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    Jul 12, 2013
    No, I haven't.
     
  17. bmgoodman

    bmgoodman Member

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    Dec 20, 2000
    Northern...
    At the risk of being totally off-base (having not kept up with state-of-the-art), aren't there jumpers on the WD10EURX drive dealing with Advanced Format? Is there any need to consider how the jumpers are set?
     
  18. cuda74360

    cuda74360 New Member

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    Jul 12, 2013
    From the WD website:

    "Early 3.5-inch WD drives with Advanced Format supported jumper pins 7 – 8. Placing a jumper on these pins adjusted the drive’s internal alignment for single partition XP installations. Support for this jumper setting is no longer needed on newer drives."

    So, this setting won't help since TiVo, and Linux in general, uses multiple partitions.
     
  19. unitron

    unitron Active Member

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    semi-coastal NC
    I realized later that I'd probably not looked at your partition map closely enough (or with enough sleep under my belt) and was probably mistaken in what I said, and sure enough, I was wrong.
     
  20. nooneuknow

    nooneuknow TiVo User Since 2007

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    Cox Cable...
    There's yet another thing you and I share, or have in common: Posting while sleep deprived. :D
     

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