I am building a NAS in RAID 1 (Mirror) mode. Should I buy 2 of the same drive from the same manufacturer? or does it not matter so much?
You can use different manufacturers, just make sure they are the SAME size and speed. You can also get the same ones from the same vendor, just from different online shops to try and offset getting a bad batch.
vegivamp@feddit.nl 11 months ago
Quite the opposite. Use drives from as many different manufacturers as you can, especially when buying them at the same time. You want to avoid similar lifecycles and similar potential fabrication defects as much as possible, because those things increase the likelihood that they will fall close to each other - particularly with the stress of rebuilding the first one that failed.
duncesplayed@lemmy.one 11 months ago
To the best of my knowledge, this “drives from the same batch fail at around the same time” folk wisdom has never been demonstrated in statistical studies. But, I mean, it’s certainly not going to do any harm.
Hopfgeist@feddit.de 11 months ago
It may, performance-wise, but usually not enough to matter for a small self-hosting servers.
Overspark@feddit.nl 11 months ago
If everything went fine during production you’re probably right. But there have definitely been batches of hard disks with production flaws which caused all drives from that batch to fail in a similar way.
SupraMario@lemmy.world 11 months ago
I know it’s only what I’ve experienced but I’ve been on a 2 weeks of hell from emc drives failing at the same time because dell didn’t change up serials. Had 20 raid drives all start failing within a few days of each other and all were consecutive serials.
empireOfLove@lemmy.one 11 months ago
If I had a dollar for every time rebuilding a RAID array after one failed drive caused a second drive failure in the array in less than 24 hours… I’d probably buy groceries for a week.
avidamoeba@lemmy.ca 11 months ago
When using drives from the same model and batch?
teawrecks@sopuli.xyz 11 months ago
I don’t know if you’re talking about the sample of cases you’ve personally witnessed, or the population of all NASes in the world. If the former, that sounds significant. If the latter, it sounds like it’s probably not something to worry about.