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HR20-700 RAID EXTERNAL DRIVES. THIS IS THE ONE.

Discussion in 'DIRECTV Tips and Resources' started by ItsMeJTO, Dec 29, 2006.

  1. ItsMeJTO

    ItsMeJTO AllStar

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    Dec 21, 2006
    http://www.cooldrives.com/harasaiipomu.html

    Want HUGE external drives, this above link is for you.
    A 5 bay, hardware raid-0 (recomended for max storage) or raid-1 mirror for 1/2 the capacity with duplicated data safety (auto rebuild on errors).
    Running with 5 Seagate ST3750640as-rk (SATA II) (compusa/bestbuy $319.00) 750GB drives in raid-0 produces a massive 3.75 TerraBytes. Will also work with smaller drives.
    now starting to record HD movies as fast as I can, may take a while to see if the HR20-700 can/will address it all.
    Setup must be completed via a pc or mac with external E-SATA port so you can choose which raid level before hooking it up to the hr20-700.
    So far it seems to support dual recordings and play with no glitches or pixelation.

    More info to come later.
     
  2. Jan 2, 2007 #2 of 35
    jedster

    jedster Legend

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    Sep 19, 2006
    What are the acoustics like on that beast? Does it have any sound dampening / anti-vibration properties? If anyone is serious about doing eSATA raids I would strongly recommend using Samsung Spinpoint T 500 (the 166 platter). I have tried several others -- Seagate, Maxtor, WD. Only the WD comes close in terms of noise, but the Samsung seeks are clearly quieter.

    If HD idle noise and seeks don't annoy you, then the Seagate would be a good drive (they have excellent performance).
     
  3. Jan 4, 2007 #3 of 35
    Cyrus

    Cyrus Godfather

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    Oct 22, 2006
    ItsMeJTO. are you using the full 3.75TB setup with hr20?
     
  4. Jan 8, 2007 #4 of 35
    ItsMeJTO

    ItsMeJTO AllStar

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    Dec 21, 2006
    I hope so, still trying to fill it up . pheeeeewww !!! it's gunnah be a while.
    Pages and pages of HD recordings and it's only just hit 80% available.
    Stay tuned.
     
  5. Jan 8, 2007 #5 of 35
    ItsMeJTO

    ItsMeJTO AllStar

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    Dec 21, 2006
    .

    I have the Seagate 750 Barracudas and they are internally dampened so the blurb says, with 5 of em spinning and stepping it's acceptable and can only be heard close up. As they are in a cabinet under the TV with glass doors the only noise i can hear are the extra cooling fans I had to install in the back of the cabinet. Overall, it's acceptable and makes no more noise than the average computer.
     
  6. DaHound

    DaHound Legend

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    Nov 20, 2006
    Are you guys with esata having any of the problems others are reporting without esata?
     
  7. ItsMeJTO

    ItsMeJTO AllStar

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    Dec 21, 2006
    Best way to boot with an external drive I've found so far is to plug up everything correctly, then turn off both the drive and receiver (pull the 110 plug) as the receiver never actually powers down with the front switch button or remote off. Wait 15 minutes and then power everything back up at the same time, mine now boots this way every time.
     
  8. P Smith

    P Smith Mr. FixAnything

    21,623
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    Jul 25, 2002
    W.Mdtrn Sea
    There is no way to boot HR20 from internal or external disk.
    Only from flash - so, no Linux or TiVo ports .:(
     
  9. ItsMeJTO

    ItsMeJTO AllStar

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    Dec 21, 2006
    I guess I meant to say, the external drives are recognised every time by the IRD if booted this way.
     
  10. houskamp

    houskamp New Member

    8,636
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    Sep 14, 2006
    Hows it going? I figuired it would hold 11 weeks on 2 mpg2 hd channels...
     
  11. ItsMeJTO

    ItsMeJTO AllStar

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    Dec 21, 2006
    like the energizer bunny.
    still going !!
     
  12. Cyrus

    Cyrus Godfather

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    Oct 22, 2006
    That's really cool. One thing to note is if you ever have to reboot and find the playlist empty (hopefully that won't happen), don't reformat. It seems that multiple reboots may fix that problem.
     
  13. houskamp

    houskamp New Member

    8,636
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    Sep 14, 2006
    It's great having too much $$ on hand ain't it :)
     
  14. brownram

    brownram AllStar

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    Jan 18, 2007
    [/QUOTE] Want HUGE external drives, this above link is for you.
    A 5 bay, hardware raid-0 (recomended for max storage) or raid-1 mirror for 1/2 the capacity with duplicated data safety (auto rebuild on errors).
    Running with 5 Seagate ST3750640as-rk (SATA II) (compusa/bestbuy $319.00) 750GB drives in raid-0 produces a massive 3.75 TerraBytes. Will also work with smaller drives.
    now starting to record HD movies as fast as I can, may take a while to see if the HR20-700 can/will address it all.
    Setup must be completed via a pc or mac with external E-SATA port so you can choose which raid level before hooking it up to the hr20-700.
    So far it seems to support dual recordings and play with no glitches or pixelation.

    More info to come later.[/QUOTE] i thought that you could only use an enclosure with hardware raid built in. the enclosure you have listed has port multiplication built in. if you have this working that means the esata port on the hr20 supports port multiplying. if it didn't the hr20 would only run 1 of the 5 drives can you confirm that all 5 drives are active
     
  15. GollyGee

    GollyGee AllStar

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    Feb 5, 2007
    The enclosure has the Sil 4726 chip, which is both a port multiplier ("JBOD") and hardware RAID controller ("BIG", "SAFE", or "FAST").

    I successfully used one with four concatenated 250 GB drives and it worked. The four drives appeared as a single terabyte drive. I'm going to try larger drives in a day or two. But you're right that, if you use the enclosure in "JBOD" mode, the DVR will only recognize the first drive.

    I don't think that RAID striping offers any advantages over concatenation, in this kind of case.
     
  16. P Smith

    P Smith Mr. FixAnything

    21,623
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    Jul 25, 2002
    W.Mdtrn Sea
    'striping':
    - in RAID-0 decrease access time (good), no safety (minus)
    - in RAID-5 increase acc. time (minus), but add a protection in case of one disk failure (big plus), same time you'll lost 1/n user space (minus) and need 3+ disks same size (not a model !)

    So technically speaking RAID-O does have advantage over concatenated disks.
     
  17. GollyGee

    GollyGee AllStar

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    Feb 5, 2007
    You're right, except, in this case, I don't think the additional speed of RAID-0 is used. Another benefit of concatenation is that the drives don't have to be the same size. For example, you could probably pull the internal 250 GB drive out of the DVR and use it in your array, even if your other drives are different.

    Future DVR's may be "concatenation-aware", and operate seamlessly when additional concatenated storage is added, but that's not the case with this DVR.
     
  18. ItsMeJTO

    ItsMeJTO AllStar

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    Dec 21, 2006
    Sorry I didn't see this thread was expanding with interest.
    I'll keep it short. The drive enclosure with 5 - 750gb drives and the silicon image 4726 chipset as in the above mentioned 5 bay case, does work with the hr20-700 in true raid-0 mode. I have sucessfully filled the drive to 1% available now with a whole shootload of data/movies. The setup utilities must be used connected to a pc or mac to initiate the raid-0 modes, but then just disconnect and fire it up on the hr20-70. Power everything down for 15 minutes, attatch all cables etc, then power everything up at the same time.
    Yes it's expensive, but you get oodles of space (3.75TBytes)
    You could start with two drives and build up as you need it (loosing all data if you add a drive)

    http://www.siliconimage.com/docs/SiI4726_Manager_User's_Guide_v2.6.pdf
     
  19. Spanky_Partain

    Spanky_Partain Active Member

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    Dec 7, 2006
    Thanks for the update. I have been watching for this post!
     
  20. GollyGee

    GollyGee AllStar

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    Feb 5, 2007
    How is Fast Play working for you? I tried switching from Concatenation to RAID-0 (Fast), and Fast Play looks much smoother to me.

    Have you noticed this improvement?
     

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