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HR34 and 4TB External Drive

Discussion in 'DIRECTV HD DVR/Receiver Discussion' started by docderwood, Sep 28, 2012.

  1. Nov 26, 2012 #81 of 132
    Rich

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    Thanx. That isn't where I saw it, but what I saw said the same thing. That website is really something to navigate thru.

    Let me read that.

    Rich
     
  2. Nov 26, 2012 #82 of 132
    BAHitman

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    I just moved from 4x750G RAID5 to 4x3TB RAID5 in my Promise SmartStor DS4600 enclosure (I have 2 of these enclosures)... I moved all the recordings over and went from 2% free to 76% free.

    The 750's were some old WD's I had lying around, the 3TB's are the WD RED drives.

    My observations: The RED drives are ALOT quieter and cooler than the 750's were... and the fan on the RAID box is either on it's lowest speed or off. these are some of the coolest HDD'S I have seed. No performance differences noticed thus far...
     
  3. Nov 27, 2012 #83 of 132
    Podkayne

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    So, what then is the external drive storage limit on the HR 34? 3TB, 9TB, whatever you want?
     
  4. Nov 27, 2012 #84 of 132
    Davenlr

    Davenlr Geek til I die

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    WD Red drives? Their website only shows Black and Green and a couple other names without colors. What is the "red" drive all about?
     
  5. Nov 27, 2012 #85 of 132
    RunnerFL

    RunnerFL Well-Known Member

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    I've tested up to 12TB.
     
  6. Nov 27, 2012 #86 of 132
    RunnerFL

    RunnerFL Well-Known Member

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  7. Nov 27, 2012 #87 of 132
    CCarncross

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  8. Nov 28, 2012 #88 of 132
    unixguru

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    Cutting through the Intelli* marketing, the GREEN and RED are 5400 rpm. Your old drives were probably 7200. That does a lot to reduce noise and heat (and power consumption!).

    The number of DVR streams supported today really have no use for faster rpm.
     
  9. Nov 29, 2012 #89 of 132
    Rich

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    Wonderful website isn't it? I damn near went nutz trying to find the warning about using Green Caviars in RAID boxes. If it wasn't for unixguru I'd still be looking for it.

    Rich
     
  10. Nov 29, 2012 #90 of 132
    Rich

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    Ever figure out why the Green Caviars aren't recommended for RAID setups?

    Rich
     
  11. Nov 29, 2012 #91 of 132
    dpeters11

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    I believe it's because of issues like time required to wake up, or if it hits a bad sector and goes into a longer recovery scan. This can cause the drive to get dropped from the array. I don't think they support Time Limited Error Recovery.

    This may not be an issue with all RAID controllers etc, but they pretty much have to make a blanket statement.
     
  12. Nov 29, 2012 #92 of 132
    Rich

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    Whoosh!!! Went right over my head with that one! But at least I can see some reasoning for the warning, I guess.

    Rich
     
  13. Nov 29, 2012 #93 of 132
    RunnerFL

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    It wouldn't be wake up, RAID never sleeps. If a drive is in a RAID array it never spins down. Bad sector recovery is plausible though.

    It probably has more to do with the quality of the parts in the drive itself. Since Green are the bottom of the line WD drives putting them in a RAID array probably shortens their lifespan.
     
  14. Nov 29, 2012 #94 of 132
    dpeters11

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    Basically, if the drive hits a bad sector, it can spend up to 30 seconds trying to repair it, move data off etc. I don't think it really responds to the controller during this period, so at least potentially the array could think the drive had failed, dropping it.
     
  15. Nov 29, 2012 #95 of 132
    RunnerFL

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    That depends on the controller and whether or not there is a write caching battery. This leads back to you saying it's probably a blanket statement. I think you're right there. The green drives may be just fine with a higher quality RAID controller with write caching but to be safe they just said no to RAID for the green drives.
     
  16. Dec 1, 2012 #96 of 132
    unixguru

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    Unlikely that the kind of controllers we are talking about, 2-4 drives, would have any kind of battery.

    Even if they did, it wouldn't help. Every RAID controller is going to decide a drive is dead when it doesn't respond after some period of time. Once it decides it isn't going to automatically change it's mind. Even if it did keep retrying access after it has marked a drive dead it isn't going to automatically bring it back if it starts working again. The logic is if the drive didn't respond reasonably then there is something wrong with it. You don't want to start using a questionable drive again - and likely have it fail again. The longer you play games like that the higher the probability that other drive(s) in the RAID group will develop a problem which increases the risk of losing all integrity of your data. RAID is about reliability and one errs on the conservative side. Of course a manual intervention can tell the RAID controller to bring the drive back - with cheap no-knob RAID this is done by ejecting the drive and reinserting it.

    My guess is that a "RED" drive is basically the same as a "GREEN" drive with some firmware tweaks (i.e. a few of the enterprise-class options).

    I'd speculate that most/all the models are mostly the same physical device. Maybe the platters are graded/sorted. Possibly different speeds of the controller chip. Different cache RAM sizes. Different firmware (rpms, options, etc). The only reason to do all this complexity is price (to customer). Basically the physical device is mostly the same cost to manufacture no matter what model.
     
  17. Dec 4, 2012 #97 of 132
    franklin_planner

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    Can anyone confirm that the Thermaltake BlacX ST0005U will recognize all 3TB of a Western Digital WD AV-GP WD30EURS 3TB drive connected to an HR34?

    I have had good luck with that enclosure with the 2TB version on my HR24.

    Thanks for any help.
     
  18. Dec 4, 2012 #98 of 132
    Rich

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    Let us know how it works. Info is sketchy right now on what works with the 34s.

    Rich
     
  19. Jan 8, 2013 #99 of 132
    ScottBRLa

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    I subscribed to DirecTV yesterday, and the installer will be bringing my new HR34 next Friday. I apologize for an elementary question, but I'm not incredibly tech savvy. If I buy the items you referenced, I can pretty much "plug and play"? And take advantage of 9TB of DVR storage on my HR34? Or, do the hard drives require some setup?

    Thanks for any advice you can give.
     
  20. Jan 8, 2013 #100 of 132
    Laxguy

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    I'd suggest you take your time. The Genie has, for me, plenty of space. All depends on your viewing habits. I personally don't want a large library, and I never keep sporting events. Just movies and a few series. Mileage varies, but RunnerFL's set up is quite sophisticated.
     

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