A few (mostly basic) storage questions

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So I've got 4 storage units, 2x 1TB HDDs that came with my PC about 3-3.5 years ago, 1x 500GB hybrid drive (about 1.5-2 years old) and 1x 120GB SSD (about the same age as the hybrid). Before I just kind of plugged them in and got on with it, now I seek some knowledge about them, hopefully a few of you might be able to help.

1) Ok, given how a lot of my documents, etc. are fairly time intensive (lot of 3D designs, simulations... video game saves :P... etc.) I recently decided to raid my two 1TB drives together in RAID1 and forgo the extra storage (it means a bit more spring cleaning, etc. but means I automatically have a backup if I put stuff on one of those drives). I've done this using Intel Rapid Storage Technology (no idea if that's the best thing to use but was the way I worked out how to do it!). It now lists them as drives merged in an array to form a single 1TB volume. So my question is, should one fail what would I need to do, if anything, to gain access to the remaining HDD? Would I be able to access it straight away or would I need to un-RAID it or something? Also would I be likely to get any indication that one of those HDD had failed? Or would it come down to looking at the program previously mentioned regularly to check on them? [On a side note if any of you know about this program I have an additional question but I'll save that for if anyone has dealt with it!]

2) Self Solved

3) As mentioned, until recently I never paid much attention to my storage, just plugged it in and got on with it. Now I'm starting to realise that this isn't the best policy! I recently saw that it's recommended to have SSDs using ahci. Until recently I wouldn't have even known what my system was using, but the other day I had an issue with my computer restarting during boot and a helpful person on this forum worked out a setting in BIOS had swapped to ahci. The other option was RAID and when I selected it my computer went back to normal. So basically, what's the difference? Should I swap over? If so how would I go about doing that? Would it involve reformatting all my drives?


Anyway, I THINK that's all for now! As I said they're probably very basic/naive questions, but hey we all had to start somewhere :D Any help will be much appreciated!
 
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To be honest I think you're making this far more complicated than it needs to be. An external disk is the easiest and most economic way of doing backups.

Don't, whatever you do, rely on RAID1 - it's a redundancy solution, not a backup. If you delete something by mistake it's gone, same as with a single disk.
 
To be honest I think you're making this far more complicated than it needs to be. An external disk is the easiest and most economic way of doing backups.

Don't, whatever you do, rely on RAID1 - it's a redundancy solution, not a backup. If you delete something by mistake it's gone, same as with a single disk.

Deleting things isn't something I'm particularly worried about, typically when I'm working on a project none of the files get deleted until I am finished and can confirm the final (and any key) copy is left whilst others are deleted. If anything I have too many extra copies as I'm paranoid of deleting the wrong file. What I'm looking for is protection should a disk fail.

I get your point about external disks and do agree with it. In the future I plan on having an external array to do backups to. However I'm currently on my masters year at Uni and can't afford to buy any new hardware, thus I'm having to make do with what I have until I finish my degree and get a job (when I'm most likely going to build a new PC).
 
If all you have is two disks, and you can't buy another, normal disk + backup will be more resilient than a raid 1. Raid 1 will look after a disk failing in some ways. If one disk starts to corrupt your data, the corruption is probably copied across. If the controller, motherboard, power supply fails, both disks die. If a disk fails, the raid "should" recover gracefully and allow you to access the remaining disk, but it might not.

Consider buying a usb stick. I'm currently using two hard drives in raid 1, with the files that genuinely matter to me (.pdf files and source code) written to a usb stick every week or so. Otherwise Dropbox is a sort-of viable backup, though I don't trust Dropbox since it ate my files.
 
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