It’s a concern as if you start at 80% or more, he couldn’t afford a second parity disk so it’s more than 80% full thusly, then, where is the room for snapshots, additional data over time, etc? You mentioned the SLC and higher capacities.
Of course 80% is not a magic number. But when you do reach 80%, it’s time to start thinking about more space. I’ve never filled a nvme pool to 90%, so, not sure of that impact. I suspect it indeed is better than rust. But I wouldn’t fill it that high anyway.
We’re really all guessing as to what this data is, what the backup plan is, etc.
Learning a new term from above, it’s a WORM pattern for media storage mostly. It’s backed up to the cloud. There’s nothing “important” or valuable on there in any case.
I’d obviously prefer not to lose stuff, and I’d prefer not to have recover from the cloud.
I currently have 17TB written, 12TB remaining == 60% usage level. I’m not really sure of my growth rate exactly, but when I say I need at least 10 drives for data, I mean I want this system to last a good few years before it fills up and I need to upgrade all the drives.
Anyway, my question is, fingers crossed, hopefully moot because I’m now running on an SSD flash drive which did not throw up the usual USB-related errors during boot up. If the system stays up for a week, I’ll go with RAIDZ2 across 12 drives.
From what’s been said above, that might be too cautious, but I’m happy to have the extra peace of mind if I also have enough space to last a long time.
It’s not too cautious by any means, I was just going off what you said. If you can do the Z2 and you are happy with that and can afford the space, go for it! There’s no right answer really. It depends on your priorities, what you deem most important.
Good to hear the flash drive doing better, at least so far!
(I’ve got an SSK USB SSD as well, but it arrived a day after the SanDisk, and I feel like SanDisk are more likely to have a produced a device with greater reliability/compatibility, so am sticking with it, keeping the SSK as a cold backup.)
Nope - Solid State Flash Drive is exactly that - a (fast) Flash Drive and NOT an SSD - so your Total Bytes Written (TBW) will be that of a flash drive and not that of an SSD.
But you are right that the underlying NAND technology is pretty much the same - just the TBW and internal architectures will be different.
Because the storage part of the device doesn’t matter to me at all. If the flash fails, I spend a few minutes reinstalling the OS on a new stick, and recover from a config backup.
What mattered to me was having something with a controller that actually worked and didn’t result in a randomly failing system. I felt that was going to be more likely with the device from the bigger company who sells to a much larger market and has more customers. They must have figured out compatibility.
This is coming off having been potentially burned by going with UGREEN for my NVMe enclosure.
