this post was submitted on 08 Jun 2025
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What the hell is RAID and NAS ? I have a bad ass DvD collection to the tune of 3k films ( no pineapple express bull shit ) that I've been wanting to back up. I don't know shit about computers but have a 2014 MacBook pro with a disk drive that has never been online just used to watch movies when the power is out and to load my cd collection to mp3 players.
Help me out here !!!
A RAID is essentially a way to have multiple "hard drives" connected in a way that looks as if it's one drive so you can have a ton of storage.
A NAS is a sort of like a remote storage device. Not quite a PC, but more than just a storage drive.
Not sure how you'd go about doing any of that with a MacBook.
Adding to that, depending on your RAID configuration you can have one or more drives fail and not lose any data.
Also you can install things like Plex media server or Immich and set up basically your own equivalent of Netflix server or google photos and look at your media from pretty much anywhere.
NAS stands for "Network Attached Storage", basically a computer whose sole purpose is storing and serving files in your home.
RAID stands for "Reduntant Array of Inexpensive Disks", and is broadly a way to merge multiple disks into one.
RAID 0 means that files are evenly distributed on all disks, which improves IO speed and extends a file system (≈ a partition) 's capacity, but it's useless against disk failure;
RAID 1(mirroring) means that all disks have the same data as a sort of real-time backup, and as long as one disk remains functional, all the other disks can fail without the data becoming inaccessible;
other RAID levels use clever math to offer a mix of the first two, spreading files among disks (like RAID 0) but still tolerating failures of a small number of disks (like RAID 1 but way less redundant).
Wikipedia has a less abridged explaination on its RAID page.
Ahh , I see , i still have no clue 😅. But at least the acronyms are kind of giving me an idea. Thanks !
So these are not like a physical 1 terabyte external storage thingy that I've seen on ebay etc.? Would one of those external drives work for backing up physical media collections, or are they a bad idea? Is that considered NAS?
I'm sorry I don't understand any of this stuff , I really should. I will check out the RAID wiki !
Removable storage isn't NAS, it's just good ol' storage, but a valid backup option nonetheless.
Removable HDDs and SSDs tend to be less reliable than their internal counterparts, I don't know to what degree, but if you make backups reasonably frequently, your OS will PROBABLY detect failures and point them out.
If you have extremely important data (like $9B worth of Bitcoin or something) you would need:
Speaking of encryption: do NOT store unencrypted sensitive data on removable storage.
Things like .kdbx files from KeePass should be fine, the application takes care of encryption for you, otherwise you should look for ways to encrypt each file or the storage device itself.
I personally have one 2TB external HDD and a RAID0 pair of 1TB HDDs, which I don't use exclusively as backup, and if an airplane crashes on my house then gg bb; cloud storage solutions are way more reliable than handling storage yourself, but then you'd be entrusting third parties with your stuff.