brian
New Member
Posts: 1
|
Post by brian on Aug 10, 2008 22:20:27 GMT 7
I have just purchased a N4100+ and would like to use Western Digital 1TB hard drives in Raid 5.
Has anyone any experience of.
Western Digital Caviar Green 1TB SATA-II 16MB Cache (WD10EACS)
|
|
|
|
Post by travisdh1 on Sept 26, 2008 1:45:25 GMT 7
I have just purchased a N4100+ and would like to use Western Digital 1TB hard drives in Raid 5. Has anyone any experience of. Western Digital Caviar Green 1TB SATA-II 16MB Cache (WD10EACS) We're running two 4100+ units with 4 Western Digital Green 1TB drives each (currently running in RAID5 + hotspare in each system). They work great, if a little on the slow side (filling up terabytes across a network is the biggest problem). |
|
|
|
Post by jmirabil on Nov 7, 2008 1:52:41 GMT 7
I have just purchased a N4100+ and would like to use Western Digital 1TB hard drives in Raid 5. Has anyone any experience of. Western Digital Caviar Green 1TB SATA-II 16MB Cache (WD10EACS) We're running two 4100+ units with 4 Western Digital Green 1TB drives each (currently running in RAID5 + hotspare in each system). They work great, if a little on the slow side (filling up terabytes across a network is the biggest problem). IMPORTANT QUESTION: DO THESE WD10EACS DRIVES GO INTO SUSPEND MODE AFTER 30 MIN as the default specifies? I'd love to buy 4 for this NAS but need the spindown feature before doing so... Anyone know or tested this? Would you consider trying? thx... |
|
|
|
Post by travisdh1 on Nov 7, 2008 20:11:01 GMT 7
We're running two 4100+ units with 4 Western Digital Green 1TB drives each (currently running in RAID5 + hotspare in each system). They work great, if a little on the slow side (filling up terabytes across a network is the biggest problem). IMPORTANT QUESTION: DO THESE WD10EACS DRIVES GO INTO SUSPEND MODE AFTER 30 MIN as the default specifies? I'd love to buy 4 for this NAS but need the spindown feature before doing so... Anyone know or tested this? Would you consider trying? thx... Yes, they DO spin down. I assume it's around 30 minutes but I've never actually timed it. It can take up to 2 minutes for all the drives to wakeup on the first access after going into sleep mode, but that should only matter for stuff like automatic backups that time out to quickly. And just for further information that may or may not be relevant the 4100+ models seem to use about 55 watts at idle (we have 2 units and a UPS that draws 110 watts at idle.) |
|
|
|
Post by jmirabil on Nov 8, 2008 0:56:52 GMT 7
TravisDH, you are the bomb!
Thanks so much for the quick reply to verify that the WD10EACS drives do spin down. The default timer is indeed 30 min of disk inactivity. I have no issue with the "huge" 2 min delay, and I figure it's to be expected for a 4 drive array to fully fire up and synchronize--like it takes ~90 sec for the unit to fully "boot" per the specs and my timing it. I too run a ups with power-monitoring and it helps.
reference: Dropping from 4x 750gb Seagate "640AS" drives (2.1TB array)to the WD1000FYPS drives saved me 40 watts in the (2.76TB) Readynas NV+ array, and more importantly, the unit ran MUCH COOLER and the fan slowed down as a result and was quieter-multiple benefits, but no spindown.
GREAT INFO ON the 55watts at idle for the N4100+!:
Now the 55watts at idle is not that cool. I had three 500gb drives in individual enclosures that use about 65 watts per my "Watt's up" meter. They use a little more (about 75 watts) under load. So trading three separate (NOISY!) enclosures w/ 500gb drives for one N4100+ with 3TB raid5 capacity using WD10EACS drives is really more of a NOISE savings with a capacity gain. Though my work's ReadyNAS NV+ has four Enterprise WD1000FYPS drives and it is quiet and cool and low on energy but it cannot spin down, regrettably.
Frankly with 55 watts at idle I'd venture that the large fan on the N4100+ could be spun down some more, or they have a poorly designed power supply or PS fan. I'm going to bug Thecus over this. I expected more like 20-25 watts at suspended-idle with four greenpower drives like a DROBO uses. Well I paid $400 more for the readynas NV+ and I'm getting what I paid for. If I can't slow down the fan I might just rearrange other nearby devices to use that fan's circulation/cooling.
I also saw there was a S.M.A.R.T drive temperature add-on N4100+ module last I looked and I'll probably add that in to monitor individual drive temperatures, labeling them in the Linux conventions SDA,SDB,SDC,SDD.
GREAT info! thx much! Just need to get 4x WD10EACS drives now...
-Jonathan
|
|
