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RN314 re-syncing even though sync completed
RN314 from 2014... came with 4x1TB Toshiba MG03ACA100 drives. Noisy as hell, and out of space. So, in process of upgrading to Seagate ST4000DM004 4TB drives. This is for personal use, so not "mission...
Stephen! Thanks again, incredibly helpful. I did let the second resync complete, which took over 10 hours. At midnight, dropped in the third disk, completed in about 5 hours again and Is now on a 20+ hour second sync, exactly as you described. Altogether this process is going to take around 3 full days, which really surprises me. Seems horribly inefficient. I'm wondering now if it would have been better to just copy everything to my larger NAS, replace all 4 drives at once, then just copy everything back. Only talking about 3TB. Seems that would have been way faster than this RAID rebuilding process.
As you continue through the process, you are much better off doing the hot swap, as that lets you and the NAS know what is going on as it happens (removal, insertion, and re-sync are logged). As an EE, you should know that the power pins on the drives are not all the same length, expressly to safely support hot swapping. Hot swapping with a cable where it may not go straight on can still be an issue. But in a NAS, they go in straight.
BTW, "DM" drives are a poor choice for a NAS (or any RAID). They wll likley suffer from premature failure and may cause other issues along the way. There is a reason NAS purposed drives were created.
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