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I hope this is the right place to post this question.
I've been searching for a while, to find an answer to this. I'm trying to find out what is a better approach for our household.
- Buy two NAS devices, and have the main one backup to the other one every night. Both will have a 3TB hard drive.
- Get one NAS device, with two bays and RAID-1. And use two 3TB hard drives in them.
Both approaches result in 3TB being available for storage. The first prevents most data from being lost (a maximum of 24 hours can be lost if the main one crashes). The latter (in most cases) should avoid any data being lost altogether.
As far as I'm concerned, RAID-1 is the way to go. Because of these reasons:
- Faster (concurrent) access to data.
- More secure on drive failure.
- Easier to manage (only one device, not two)
- Easier integration from any device (only 1 IP address, no need to switch in order to read from the other one)
However, someone I'm having a discussion with about this subject thinks the two NAS devices approach is better. A friend recommended it to him. His only argument is that when one of the NAS devices dies, the other one can take over all functionality.
Note that in the case of having two NAS devices, they'll not be more secure from for example the house burning down. So location isn't an argument here.
Does either solution bring complications when it comes to compatibility. Such as playing from a PC, a media players, internet TV, etc.?
What are the pros and cons of either scenario? And which is the recommended one?
I'd go with the raid-1. there are some minor risks to either approach, but I'd rather trust drive mirroring than that the network backups complete successfully. the two nas approach would need extra infrastructure to fail over automatically either way. I'd guess it would probably be cheaper as well. also i love my synology NAS, so look into the DS212 or DS213 lines. – Frank Thomas – 2012-12-07T15:22:11.407
Synology was already the brand we were going for, and thank you for confirming what I expected :). – Aidiakapi – 2012-12-07T15:36:51.587
1RAID is not backup – Ƭᴇcʜιᴇ007 – 2012-12-07T15:37:46.873
1Nope, its redundancy. but then again, the only really pertinent attribute of a backup is its redundancy.... I get what you are saying, but it is a little pedantic. – Frank Thomas – 2012-12-07T15:53:11.017
@techie007 As true as that is, it's not about RAID-1 being a backup or not. We don't need a backup, we need secured storage. A backup is one way to guarantee that most of the data is stored securely. – Aidiakapi – 2012-12-07T18:12:11.897