the itjerk

my adventures with technology

Monthly Archives: May 2018

raid, again, and backup

I bought two 3TB drives to replace my 1TB RAID. Easy enough, because with hardware RAID 1 the disks are identical: you can pull one drive out, plug it into a USB enclosure, and provided your computer is compatible with the drive’s format — ext4 in my case — you will have two functioning backup drives to copy over to the new RAID (and eventually erase/shred).
sudo shred -v -nX -z /dev/sdX

A thing about buying a hard drive. I notice that the marketing has now shifted to “intended use” of the drive – Desktop, NAS, Surveillance, etc. Guess what, I call b.s. — they’re all the same drives, probably just the more expensive ones were tested more (to justify price/warranty). Please, let me know otherwise if you think I am wrong.

Maybe I should have got 4TB discs? I don’t know. Going from 70% used to 70% available is a jump. I do want to rip more of my CD library to my computer, because digital music is here to stay (and when I say “more” of my library, I mean a “curated” more of my library). I rip to FLAC, which is all the quality I require (considering the source is 16bit/44khz), so how much will I need? Figuring FLAC at level 5 is about 300-350 MB per CD, 2TB will hold a LOT of CDs.

2000000 MB / 330 MB = 6060 CDs

I should probably also mention that RAID 1 is not a backup. It’s a safety copy in case one drive fails. You want backup? You gotta have two of everything. One here, and one over there. More later.

The bigger question then is what do we do with all the data we have. If I really think about it, I need to back up my photos, SOME of my music, my data (book, website, etc), and what else? Do I really need all the crap on my computer? All the files on those backup drives and old hard disks? Probably not, because I don’t even know what I have most of the time and … p0rn should never be downloaded! 😉

My next project will be to organize all my “digitalia,” and what a project that will be!

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