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Drive Expansion and Drive Upgrade FAQ

Discussion in 'TiVo Series3 HDTV DVRs' started by bkdtv, Oct 19, 2007.

  1. Dec 10, 2012 #9241 of 10248
    unitron

    unitron Active Member

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    Apr 28, 2006
    semi-coastal NC
    Considering that they call it low impedence rather than low equvalent series resistance, I'd look for something that specifically calls itself Low ESR.

    Check the capacitor threads around here and see if someone doesn't mention getting a replacement for that cap from Mouser or Digi-Key.
     
  2. Dec 10, 2012 #9242 of 10248
    unitron

    unitron Active Member

    16,387
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    semi-coastal NC
    In your case, already upped to a 1TB, willing to risk partition larger than 1TB, you probably could have done it all in WinMFS.

    Click on mfscopy, tell it to use a custom swap size (going onto a 2TB I'd have gone with 1000MB instead of 512 myself), and when it finishes, if it asks if you want to expand, great, otherwise, click on mfsadd, and either way tell it you do not want to limit partition size.

    It should then take that already existing 15th 3rd MFS Media partition and made it bigger to fill the 2TB drive.

    This is in theory, I'm still trying to get the time and bench space to experiment with the 648 I recently acquired.
     
  3. Dec 10, 2012 #9243 of 10248
    jmbach

    jmbach der Neuerer

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    Since I am waiting on capacitors before I close up my box, I'll give it a try and report back. Will make a 1024mb swap size and allow it to optimize the partitions.

    Jim
     
  4. Dec 10, 2012 #9244 of 10248
    ac3dd

    ac3dd New Member

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    Mar 2, 2002
  5. Dec 10, 2012 #9245 of 10248
    unitron

    unitron Active Member

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    I don't know if it is or not, but 1GB is only about 15 minutes of analog cable at best quality, so I just think of it as cheap insurance.
     
  6. Dec 10, 2012 #9246 of 10248
    ac3dd

    ac3dd New Member

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    Mar 2, 2002
    I considered running the copy again to expand the swap ... but the "cost" I cared about which made me not do it was the time and hassle to rerun the copy and expand procedure, not the few gigs of disk space.

    And apparently there could be other problems that could be caused by the larger swap:
    http://www.tivocommunity.com/tivo-vb/showthread.php?p=3612772&&#post3612772
    http://www.tivocommunity.com/tivo-vb/showthread.php?p=4372670&&#post4372670
     
  7. Dec 11, 2012 #9247 of 10248
    jmbach

    jmbach der Neuerer

    1,544
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    Jan 1, 2009
    Finished the test. From and an already 1TB expanded drive you can use WinMFS MFSCopy to copy to a 2TB drive. If you click on expand drive after the copy it seems to pause. Nothing happens and the copy screen is still up. If you click on close it asks you if you want to terminate this operation. I waited for about 30 minutes and finally clicked close and then click yes to terminate this process. Then I used MFSAdd to expand the drive. Put it in the unit and everthing seems to be working just fine. I did opt for 1024 swap drive and optimized partitions. Put the drive in the unit and everything seems to be working. I would suggest if someone does it this way that they click no to expand the drive after MFSCopy is done and use MFSAdd to expand the drive.
    Here is my new partition table:

    Partition Maps
    #: type name length base ( size )
    1 Apple_partition_map Apple 63@1 ( 31.5K)
    2 Image Bootstrap 1 1@485366126 ( 512.0 )
    3 Image Kernel 1 8192@485366127 ( 4.0M)
    4 Ext2 Root 1 524288@485374319 ( 256.0M)
    5 Image Bootstrap 2 1@485898607 ( 512.0 )
    6 Image Kernel 2 8192@485898608 ( 4.0M)
    7 Ext2 Root 2 524288@485906800 ( 256.0M)
    8 Swap Linux swap 2097152@486431088 ( 1.0G)
    9 Ext2 /var 524288@488528240 ( 256.0M)
    10 MFS MFS application region 589824@489052528 ( 288.0M)
    11 MFS MFS media region 216747657@268618469 ( 103.4G)
    12 MFS MFS application region 2 589824@489642352 ( 288.0M)
    13 MFS MFS media region 2 268618405@64 ( 128.1G)
    14 MFS MFS App by Winmfs 2048@490232176 ( 1.0M)
    15 MFS MFS Expanded by Winmfs 3416780800@490234224 ( 1.6T)

    Total SA SD Hours: 2082 Total DTV SD Hours: 1817 50 % Free
    Software: 11.0k-01-2-648 Tivo Model: TCD648250B

    And BTW after researching capacitors it appears that Low ESR = Low Impedence. Different manufacturers use different nomenclature. I ended up getting the ZLH series of rubycon capacitor (25ZLH2200MEFC12.5X30). Its physical size, capacitance, and voltage matched the best and is low impedence. http://www.rubycon.co.jp/en/catalog/e_pdfs/aluminum/e_ZLH.pdf

    Jim
     
  8. Dec 11, 2012 #9248 of 10248
    unitron

    unitron Active Member

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    I found a Rubycon product sheet with more than one series of capacitors listed that indicates that they do differentiate between low ESR and low Impedence.
     
  9. Dec 11, 2012 #9249 of 10248
    MikeAndrews

    MikeAndrews Registered abuser

    14,222
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    Jan 17, 2002
    Northern...
    I'd get a spare unsubbed TiVo from Craigslist and just swap the power supply.

    I picked up enough TiVos that I have a spare for every one of mine.
     
  10. Dec 11, 2012 #9250 of 10248
    jmbach

    jmbach der Neuerer

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    There appears to be subtle differences and they are related. It seems that one implies the other. Here is a definition I found.
    Impedance (Zc) is the total opposition offered to alternating or pulsating current measured in ohms. Impedence is the vector sum of the resistive and reactive components of a capacitor expressed mathematically as Zc=sqrt(ESR^2 + (Xl - Xc)^2)

    So low impedence implies low ESR but low ESR does not necessarily imply low impedence. Discussed it with the DigiKey gurus and they agree.

    Jim
     
  11. Dec 11, 2012 #9251 of 10248
    jmbach

    jmbach der Neuerer

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    I agree about the cost of time it takes to do that. Not sure it is worth it if everything is working just fine. Since I have mine apart waiting on capacitors, I did not mind trying different things. The reference posts that you shared are about 6 years or more old and may or may not be completely valid anymore with the upgraded OS the units are running now. It would be interesting what the 1TB (or 2TB) premieres use as their swap size. Have not searched for that one yet. If the 1TB (or 2TB) premieres still use a small swap size than it makes a good argument that enlarging the swap size not important and more of a waste of space. It really depends on how the OS is written, how much memory the system has, and how the OS manages memory on whether a larger swap is needed or not.

    Jim
     
  12. Dec 12, 2012 #9252 of 10248
    dlfl

    dlfl Cranky old novice

    6,991
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    Near...
    This might be explained by the inductive reactance component of the cap equivalent circuit, as shown in Figure 3.2 of this Rubycon Technical Note:
    http://www.rubycon.co.jp/en/products/alumi/pdf/Performances.pdf
    Equation 3.7 shows the corresponding impedance equation. Note that the resistive component R is the ESR. Note in Figure 3.4 that the inductive reactance dominates impedance for higher frequencies. Perhaps "low impedance", as opposed to low ESR, is important for applications involving these higher ripple frequencies. Applying this circuit model is complicated by the fact that electrolytics are very nonlinear devices, i.e., the values of the circuit elements vary with temperature, DC voltage, age, amount of ripple current etc., as detailed in the tech note.
     
  13. Dec 14, 2012 #9253 of 10248
    scottsh

    scottsh New Member

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    I just had to replace (for the second time) a failed HD in my S3 and used a WD20EURS as well. As I didn't have a backup, I used Unitron's WinMFS backup (many thanks! Already have dropbox or I'd let you refer me!).

    I put it in, did a complete erase, and when it came back up I find I've lost the animated backgrounds (loop sets). I can't figure out what that could be?

    Anybody have any ideas?

    My part table ended up like this after a restore + mfsadd:

    Partition Maps
    #: type name length base ( size )
    1 Apple_partition_map Apple 63@1 ( 31.5K)
    2 Image Bootstrap 1 1@485364800 ( 512.0 )
    3 Image Kernel 1 8192@485364801 ( 4.0M)
    4 Ext2 Root 1 524288@485372993 ( 256.0M)
    5 Image Bootstrap 2 1@485897281 ( 512.0 )
    6 Image Kernel 2 8192@485897282 ( 4.0M)
    7 Ext2 Root 2 524288@485905474 ( 256.0M)
    8 Swap Linux swap 262144@486429762 ( 128.0M)
    9 Ext2 /var 524288@486691906 ( 256.0M)
    10 MFS MFS application region 589824@487216194 ( 288.0M)
    11 MFS MFS media region 216747008@268617792 ( 103.4G)
    12 MFS MFS application region 2 589824@487806018 ( 288.0M)
    13 MFS MFS media region 2 268617728@64 ( 128.1G)
    14 MFS MFS App by Winmfs 2048@488395842 ( 1.0M)
    15 MFS MFS Media by Winmfs 3418624000@488397890 ( 1.6T)

    Total SA SD Hours: 2083 Total DTV SD Hours: 1818 100 % Free
    Software: 11.0g-01-2-648 Tivo Model: TCD648250B
     
  14. Dec 14, 2012 #9254 of 10248
    jmbach

    jmbach der Neuerer

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    I see you have revision 11.0g. I have revision 11.0k. Consider going through the kickstart portal and force a software upgrade if it doesn't do it by itself.
    Jim

    Sent from my SPH-L710 using Tapatalk 2
     
  15. Dec 14, 2012 #9255 of 10248
    unitron

    unitron Active Member

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    I got that image from someone else, or else I got the .bak version from them, put it on a drive, and used WinMFS to make a .tbk version, but anyway, at the time I'd never even been in the same room as a 648, so I don't know what was or was not on it to begin with.
     
  16. Dec 15, 2012 #9256 of 10248
    scottsh

    scottsh New Member

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    Apr 13, 2003
    Thanks unitron, that makes sense then.

    I was able to restore from IC which worked properly. I fought with it due to the challenges with working on a new PC (based on UEFI/SATA only) but brought an old PC out retirement and it finally worked. I was trying to avoid that by using WinMFS. That's OK though.

    I restored 9.2, waited for the Tivo to update itself to 11k, then popped the drive out and took a new backup with WinMFS. You can get it here.

    http://dl.dropbox.com/u/10685537/Tivo S3 648250B.tbk
     
  17. Dec 19, 2012 #9257 of 10248
    ac3dd

    ac3dd New Member

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    Mar 2, 2002
    Two weeks since the upgrade, and despite the bulging capacitor there's been no reboots. I'm presuming it's still true that 30-second skip goes away with a reboot; it's still active so that must mean it hasn't rebooted.
     
  18. Dec 19, 2012 #9258 of 10248
    mattack

    mattack Active Member

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    sunnyvale
    I'm almost positive that they fixed the 30 second skip going away on reboot.. I had a S3 & TivoHD for years (the TivoHD is still working), and I can't remember the last time I had to reset 30 second skip.
     
  19. Dec 19, 2012 #9259 of 10248
    unitron

    unitron Active Member

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    Congratulations and you still need to deal with that power supply problem before it bites you in the backside.
     
  20. Dec 19, 2012 #9260 of 10248
    lpwcomp

    lpwcomp Active Member

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    May 6, 2002
    John's...
    Yeah, 30-second skip was made non-volatile a long time ago.
     

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