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NAS or desktop HDD for RAID 1 (or windows software raid)
hi, I want to buy two new HDD for my RAID 1 (mirror) in desktop to store my data. i have onboard RAID (ASrock H77M) but also contemplate to use the windows raid on other SATa ports (in case I want two Raid-1). size would be 3 TB or so. this is to keep data until i backup or for the backup (mirroring gives me some added safety)
I want Hitachi for the better reliability (I have WD and happy with them, but it seems Hitachis is a tad better). also want 7200 rpm.
I noticed newegg mainly sells the NAS version of the Deskstar. I read all about the 7-second timeout for NAS drives and how a RAId would drop a normal desktop HDD etc. so normally for a desktop i woudl buy the non-NAS version (which are barely available).
On the other hand the RAId 1 (on-board and windows) may benefit from the NAS version? Or am I overthinking this for RAID 1? Is the NAS version slower? Price-wise it seems more to depend on where to buy them. I don't mind spending $10 or $20 more for the right HDD while i weigh reliability higher than speed.
Currently I have two 750 GB WD Black Caviar in RAID 1 and a WD green as backup (which is terribly slow... never buy a green drive!). My OS (w7 Pro 64) is on a Samsung SSD. So speed is secondary, but I do weekly virsuscan of all my data etc, and noticed the Green drive takes half a day.So i definitely don't want a slow HDD. My case has front fans for the HDD.
What's the advice? The more I read about NAS, the more my head spins and it seems at some point all HDD will be labelled NAS. I know the NAS have less vibration etc. but the fact they give up looking for data after 7 seconds unlike desktop drives makes me nervous.
Edit: the reason I don't want a regular NAS is that if my PC fails i want to be able to pull out the HDD and install it in any PC without fuss and get my data. Actual RAID is not an option since rebuilding depends on the controller and if that fails my RAID would be gone. all i read about NAS is they are not good for backup and expensive compared what i get for a normal PC.
Here the NAS link, here the desktop link . The NAS version talks about 1 mio MTBF, so i assume it lasts longer since the desktop version doesn't mention MTBF?