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Discussion in 'DIRECTV Tips and Resources' started by houskamp, Jul 14, 2007.
I'm doubling your bet
Yep - fumble fingers again. 6TB it is.
My RAID5 setups work just fine, not slow at all.
Well, based on some research I should have done before I bought the box, those little self-contained RAID5 boxes have a general problem of being very slow when used in RAID5 mode, which stands to reason since there is a lot more calculation and data-shuffling going on. I suffered endless stuttering, jumping, freezing, program chunks missing, etc; and that was with 7200rpm drives! These maladies have all disappeared since I went with the two-drive mirrored box, even using slower drives.
It's certainly possible that you have gotten lucky with your choice of RAID5 boxes, and that they are indeed fast enough for your needs. Care to share your exact setup?
When considering a RAID setup, you must consider whether your enclosure is doing hardware RAID or software RAID. Many software RAID solutions are not fast enough to keep up with the demands of DVR use--especially the Genie. I have had a Promise technology DS4600 with 4 3TB WD red drives in RAID5 going strong for some 3 years. It just takes research as to the guts of the solution you intend to use...
HW RAID controller cards usually using in servers or workstation, you can use low cost card in your desktop though.
You are missing a fact DTV DVRs have no SW RAID support, so for the configuration you must take HW RAID capable enclosure with a internal controller.
Anyway RAID is mean "calculation" done by specialized controller of by general CPU. So, it will be software = FW [embedded software].
Actually it's all about the enclosure in general. We have seen single drive non raid enclosures have the same issues you describe with hr2xs so you can't lump anything into being bad. Also same with the individual hard drives. It's all about the particular enclosure. I believe he has a sanus enclosure for his 4 bay raid and he has in the past listed the exact model.
Your have in essence gotten just as lucky with your two bay raid enclosure as he did with his 4bay one.
No luck at all and no issues with speed, stuttering, jumping, freezing etc. Never had a single problem. My setup is somewhere in this thread.
Seems I might have spoken too soon. I've now had 3 lockups or spontaneous reboots in the last three days. Also noticed that each reboot dumps the guide data. I've tried doing a clearmybox, and I've tried the double reboot in 30 minutes trick, no joy. The new software on the HR44 has removed all of the diagnostic tests, so no help there.
It's possible that there was some data corruption in the copy process from the old drive. I'm hoping the problem will eventually work itself out over time. For the most part everything is working fine.
corruption is possible, but irrelevant for functioning DVR in your case
Incorrect... Corrupt files would be the cause of his reboots.
Only if FW [video decompression] incorrectly handling data errors.
No, not only then....
any other considerations ?
at least journaling system healing itself each boot...
I'm moving and upgrading my system a bit. I've been using an external eSata drive for a long time, but will ordering a new one for a new Genie install. I was planning on using the below system - anyone see any problems with the drive or the enclosure? Would appreciate any thoughts, particularly whether Purple is the right flavor of WD hard drive. I'm happy to spend more than the Green (that doesn't bother me) - I'm just wondering whether Purple is the best for the application or whether I'd be better with the Gold or Red flavors. Thanks for the input:
Rosewill Armer RX304-APU3-35B - External 3.5" SATA III 6 Gb/s Hard Drive Enclosure - http://www.newegg.com/Product/Product.aspx?Item=N82E16817182316
WD Purple WD40PURX 4TB SATA 6.0Gb/s 3.5" Internal Surveillance Hard Drive Bare Drive - http://www.newegg.com/Product/Product.aspx?Item=N82E16822236659
As a side note: I don't see a reason to spring for the more expensive Purple drive (here: http://www.newegg.com/Product/Product.aspx?Item=N82E16822236969) do you?
And by the way - I assume things haven't changed: All I need to do is plug the enclosure in the wall, unplug the Genie from the wall, plug the enclosure into the Genie, plug the Genie back into the wall, and I'm set, right? (No need to format, plug into a PC or do anything funky like that, right?)
I've never used anything but a Green drive since I found them several years ago. I use the EZRX models at the moment and I've had good luck with them. Had a 5 year old WD Green EADS (I think that's what it was) fail a month or two ago. I'm not a fan of the Rosewill line of external devices. I have used the ThermalTake line of docks for years. They also make good enclosures from what I've read.
Thanks for the reply. I've been using a green drive for a while and it is working fine. The purple is more expensive (which doesn't bother me much) but has more robust build - allegedly. On the enclosure, I also have been using a ThermalTake - I find the dust buildup to be sub-optimal (and their enclosures don't go above 2TB). I'll report back on the setup above.
By the way - it does look like 4TB works with the Genies, right? I've seen posts confirming but just double checking. Thanks.
I've been using this one for about a month without issues: WD40EZRX
Ditto that. See my earlier post in this thread - been running with this drive since September.
I think the TT docks will take a 3TB drive. Never tried it, I own all my equipment and prefer internal HDDs. But, yeah the 4TB will work internally with the Genies.