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Forum Discussion
Sync doesn't actually take place
Hallo,
I've had my ReadyNAS Duo for some years now and it has been working fine.
It is running RAIDiator 4.1.15, and has 2 WD Green drives that I'm trying to phase out and use Reds instead.
But the syncing is not actually taking place!
The old Greens are WD20EARX and WD20EZRX, in order of deployment, with somewhat less than a year apart.
The new Red is WD20EFRX
What I did was first shutdown the system, removed the oldest Green (from bay 1) and inserted the new Red in its place, and booted. The system soon came online- sooner than expected- and the log had:
Sun Oct 15 18:12:13 EET 2017 RAID sync finished on volume C. The volume is now fully redundant.
Sun Oct 15 18:11:23 EET 2017 RAID sync started on volume C.
Sun Oct 15 18:11:23 EET 2017 Disk initialization successfully finished.
Sun Oct 15 18:11:19 EET 2017 Disk add event occurred on SATA channel 1.
Sun Oct 15 18:10:04 EET 2017 System is up.
But the Volume settings in RAIDiator showed that both disks were empty! And my old shares were not accessible from the network.
I then shutdown, removed both drives, and reinstalled the old Green alone and made sure my files are there, then hot-plugged the new red.
RAIDiator notified me of the disk-add event, initialization of the disk and syncing. But looking at Volumes in RAIDiator I could see that the new disk was empty (1860 GB free) while the old was nearly full (187 GB free)!
So I shutdown and checked the new disk on my Linux and it had the filesystem structure but no data! Which is expected because there's no way it could sync in a few moments.
I have since returned the old disks in place, and the data seems to be OK. But even though RAIDiator reports the disks to be OK and synced, there's still discrepancy in utilised size between the two disks.
I'm no longer sure whether the reported numbers have been like this since before my attempt at replacing the disk - which I doubt - due to some bug in RAIDiator, or whether something is now wrong with the array.
I aslo don't know how to proceed with the disk replacement.
It seems I will have to make a full back and reset with the new disk in place and copy data back. But I'd like to understand what's happened, and i don't want to do that again few months from now when i get another Red disk to replace the remaining Green.
Any insights?
2 Replies
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gharbeia wrote:
But looking at Volumes in RAIDiator I could see that the new disk was empty (1860 GB free) while the old was nearly full (187 GB free)!
Hmmm. The volumes tab shows the amount of space used for the each volume. But it doesn't show that for each disk. Rather the per-disk info is the amount allocated on each disk. That should be the full disk, even if the file system is empty.
Are you seeing both a C and a D volume? Or just C?
Well, this is what I have:
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