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.
Comment on Can I use two different drives?
vegivamp@feddit.nl 7 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.
empireOfLove@lemmy.one 7 months ago
avidamoeba@lemmy.ca 7 months ago
When using drives from the same model and batch?
empireOfLove@lemmy.one 7 months ago
Yup. Same age, same design, same failures… and array rebuilds are super intense workloads that often force a lot of random reads and run the drive at 100% load for many hours.
teawrecks@sopuli.xyz 7 months ago
I’ve heard just in general. The resilvering process is hard on all the remaining drives for an extended period of time.
avidamoeba@lemmy.ca 7 months ago
So you’re saying I should be running RAIDz2 instead of RAIDz1? You’re probably right. 😂
teawrecks@sopuli.xyz 7 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.
duncesplayed@lemmy.one 7 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 7 months ago
It may, performance-wise, but usually not enough to matter for a small self-hosting servers.
TheWoozy@lemmy.world 7 months ago
I wouldn’t mix 5400 rpm drives with 7200 rpm drives, but if the rpm & sizes are the same, there won’t be any measurable performance loss.
Overspark@feddit.nl 7 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 6 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.