DiscoStu

K, will do when I get home and replace the USB. Thanks again for all the help.

Once I replace the USB, what is the suggestion? The filesystem check/fix? It seemed to not only erase disc 1, but now it is back to unmountable again so didn't fix the issue

Thanks all . Memtest returned no errors, so seems like the USB is the cause of these issues? I don't want to start rebuilding if this issue is going to pop up again, as I could loose another drive during the rebuild. Also I'm assuming doing 1 drive at a time is safer than both simultaneously?

Thanks again for your help. I have checked just about every cable and card and everything seems to be normal. Also noticed the 2 discs having issues (1 and 3), are not connected the same way, one hba card the other straight to motherboard. This makes me think unlikely a hardware issue. These are the last 2 drives I've upgraded, disc 1 last week, and disc 3 about a month ago. From here I am going to do a bios memtest, and power down. I could do the filesystem check on disc 3, but obviously worried this will erase everything like last time. Is it possible the usb stick is causing all of this? Or that both drives are just failing at the same time?

So next time if this happens, I should remove that disc so it emulates, then format it and rebuild? (assuming the drive is still good) What do you mean exactly when you say check filesystem on those drives? Last time I did the included check things did not go well. I am going to check all the physical connections soon. I do have recent usb backups, and another usb stick to use... should I switch over to this immediately? Finally, no I have not. Do you mean the bios memtest (have done that probably just under a year ago), or is there an included unraid memtest I should use?

Thanks, obviously a bit panicked here so probably typed quick... Yes normal mode showed unmountable, maintenance mode for the file system check. Never did a format, only file system check, and "fix". I know it doesn't have my data sorry, I guess what I'm getting at is in 4 minutes hopefully it didn't actually do anything to the parity drives so maybe they can be used to save the data still. I have mounted my old unraid drives to windows to read, copy, and save those files if needed thankfully, only a week ago too. My current issue, getting things back to operating so I can re build all the data. (and never ever do the filesystem check/fix again) Now though since posting this I have ANOTHER drive unmountable... so hopefully my hba card or hotswap back plate got loose and this is an easy fix. About to power down and re seat cards and cable to be sure. diagnostics-20260127-1806.zip

Running 2 parity, and 5 data drives. Upgraded 1 from 12tb to 16tb a few days ago, everything went fine. Today I get home and plex and filesystem running strange/not playing so I restart the array, still wonky. (Also I added intel gpu as shown in previous post a few days ago, seemed to work fine and I don't think related) Restart into maintenance mode and it says that new disc is unmountable:wrong or no filesystem. Did some research and ran the disc check on that disc, and then the fix. It said success, and upon restart everything "works" but everything that was on that disc is gone from filesystem, says 2% utilization (was aroudn 70). Parity and everything else seems to know nothing is wrong.... what the hell do I do??? I still have the old drive and backups of the usb from last week/etc. how do rollback or save my files?? I can't believe that "fix" erased all that data and the parity in about 4 minutes?

How would this compare to transfer speeds on windows?

Hi there, been lurking for some time now, very close to moving my files to unraid. currently on a windows 11 PC, just running Plex and sharing folders to my network. My big concern is speed, I know unraid won't be as fast as truenas/freenas but I'm concerned it will move files slower than my windows does now. Would love to have parity, but I do backup on drives a few times a year already, not worth it if anything slows down