CraigChrist8239
Dabbler
- Joined
- Feb 17, 2015
- Messages
- 27
But according to that presentation, that extra drive wouldn't have any protection as RAID-Z2 only operates within the vdev and not the zpool? I can wait just fine to get a 6th drive in. I'm kinda wondering if I can order 6 drives across 2 orders, one right after the other.What? why having 6 drives makes them spin more than having 5? besides, the paper from google (here) show no link between drive failure rate and drive usage.
No, you can't add drives to a vdev (but you can add a vdev to a zpool if you want to expand it), see Cyberjock's presentation (here) for the detailed explanation on that subject ;)
Other than that, any problems with the build? I'm probably going to order the parts tomorrow or the next day as thats when the WD discount expries.
Yes we've worked past that, see above. The problem I was having is that I was hearing I need unbuffered and buffered from different people so I was fairly confused. Luckly the T20 is pretty clear on what it supports, so this is no longer an issue.The kind of ECC RAM has to be that which the motherboard requires; read the specs for each particular motherboard. I am not certain, but the impression I get is that if a motherboard takes only 8GB memory modules it's going to require UNregistered/UNbuffered RAM and will not work with Registered RAM modules. On the other hand, some motherboards require Registered RAM modules.
Another thing: whether you're going to use 6TB or 4TB drives, compare the feedback ratings at NewEgg for the WD NAS drives and the corresponding HGST ones.
I didn't think I need to.... and I still don't think I needed to. Just as I thought, the WD drive has some bad reviews, but almost none are about the drive. For instance, this man gave 0 pros and 2 eggs because Newegg wouldn't ship it to him on Saturday, he couldn't pick it up at the warehouse, and he couldn't change the shipping address. Honestly none of these are my problem. The ones that had a problem with the drive itself seem to always get a comment from WD that they sincerely want to help. Lastly at the current price, the WD 4TB is cheaper than the comparable HGST 4TB. As previously stated I've used WD pretty much my whole life and only 1 old and cheap Green drive ever failed, so I see no reason to stop.
EDIT: Lastly I've seen the BackBlaze numbers that show the Red drives have an increased rate of failure, but I've also seen the BackBlaze storage pods, which far exceed the 8 bay NAS the Red drives are suggested for.