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Forum Discussion
Problem Adding 3rd Disk in ReadyNAS 214 #26473764
I have a ReadyNAS 214 running 6.4.2 that is about 10 days old. I started with 2 6TB drives (WD Red on the compatability list) and I've been busy backing up systems in my home office and started to r...
You have 90 phone support for a new purchase, so I would try chat or phone instead of email.
The expansion process requires either reading or writing every sector in the data volume, so it slows down as you add more disks.
The expansion is lower priority than normal file access, but the disks are still used heavily, and seek time of course increases, since the heads are moving around a lot more..
I see support has now reviewed your logs and responded to you on your case.
Something a bit unusual has happened but it does come up sometimes. Your new 6TB disk has a slightly smaller number of sectors compared with your other disks.
We can only expand volumes with disks of equal or greater capacity to existing disks. As your new 6TB disk has a marginally smaller capacity it is considered to be a smaller disk. It can't fit a large enough data volume partition for expansion of your volume to take place.
So unless WD Data Lifeguard Diagnostics can repair the disk to have the same number of sectors as the other disks you options are to try another disk instead or to backup your data, do a factory reset (wipes all data, settings, everything) with the new disk in place and restore your data from backup.
Also support was reminding you of the warranty status and your options to extend the software support beyond the basic support for 90 days (from purchase date) should you wish to. Clearly the unit is well within 90 days from the date of purchase.
I had to wipe the system and start over. It's very frustrating when drives of the same make and model have differing numbers of sectors. The first two drives were slightly bigger than the newer two. The difference in sector count was 65535 (2^16-1 which is interesting). Because of that small difference out of over 11 billion sectors, I had to wipe the system and start over. It's now says it will take 46 hours to finish resyncing.
This has not been pleasant!Yes, this is frustrating.
For the RAID to be setup, the disks have to be synced sector by sector. This is at a lower level than the filesystem. It is important to note that the initial sync is a special case where the volume is redundant throughout the sync.
You can start putting your data back on but performance for the resync would be slower than otherwise, and performance copying your data on would be slower than after the resync completes.
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