DSM 7.1 'Replace' function takes 6+ days!?

Currently reading
DSM 7.1 'Replace' function takes 6+ days!?

7
0
NAS
DS1019+
Operating system
  1. Windows
Mobile operating system
  1. Android
My 1019+ has 4x6TB SHR array (one empty bay). I want to swap all the 6TB for 12TB, one at a time of course - using the empty bay. Thought I would use the new 'Replace' functionality and it would be fast and easy. Well... its been 2.5hrs and it says only 1.75% complete and will take over 6 more days!? The drives are 80% full so that means it only has to copy over 4TB of data. Should take a few hours at most, correct?

Anyone know what is happening here? ... rebuilding from a failed drive takes less time I'm pretty sure.

TIA!

1671683011221.png
 
I had less to replace: 2x 7TB drives, 90% full, SHR, one of which was "failing" (so ~6To of data to copy) so I replaced it & it took almost 3 days. (Write at 77MB/s max [for my DS416; let's say 25 MB/s for multiple small files & syncing] offers 6TB written in 2.8 days, so quite normal.)
I then added 2 disks (identical) to fill my 4 bays & that was quite quick.
 
Upvote 0
What drives do you use ? If is SMR (instead CMR) it might be reason for such slowness (last year I was replacing 8TB with 14TB drives and each drive took about 50 hours to complete (with CMR drives) so in total it took me 8-9 days for 4 drives)
 
Upvote 0
UPDATE approx 16 hours after starting the Replace function... DSM shows 60% competed w/ 4 Hours left. Much better!

@fredbert... Wonder excatly how it does the Replace. Curious if it treats both new/old drive as a mirror'd pair inside of the Array replicating all writes to both drives... and coping the rest of the data as it goes. Then, at the end, compare / look for deltas to update just in case anything was missed.

@Quantillion ... thx for the info. with your results, mine looks like it will take around 1 day if DSM is now correct on its estimate. DSM's 6 day estimate it gave for the first few hours is way off - thankfully. I'm replacing a drive with 4TB and very little new data ever written to the array.

@Lewis ... All drives are CMR with fast transfer rates - new ones are Seagate EXOS 12GB x18 (very fast drives), the old ones are Toshiba 7200rpm
 
Upvote 0
@fredbert... Wonder excatly how it does the Replace. Curious if it treats both new/old drive as a mirror'd pair inside of the Array replicating all writes to both drives... and coping the rest of the data as it goes. Then, at the end, compare / look for deltas to update just in case anything was missed.
Good question! I don’t know. I just hope that if I need it then it does the least risk way of switching over.
 
Upvote 0

Create an account or login to comment

You must be a member in order to leave a comment

Create account

Create an account on our community. It's easy!

Log in

Already have an account? Log in here.

Old thread notice: There have been no replies in this thread for quite some time. The last reply was on .
The content in this thread may no longer be relevant. It might be better to open a new thread instead.

Similar threads

The discs arrive tomorrow. For now I have moved all the files from the small volume and it is now ready to...
Replies
12
Views
874
yes, will definitely use the move function, its way faster. I just hope it can move my VMs running too...
Replies
8
Views
1,217
The drive is a completly new drive. And it is surpose to replace the other drive. I put it in the nas...
Replies
14
Views
1,976
  • Locked
@esbenvb Please do not make duplicate posts on the same issue. Also, while you obfuscated the word it's...
Replies
2
Views
9,544
How did it go? I have a DS720+ with a WD white label drive installed and just purchased a WD Red Pro 18 TB...
Replies
6
Views
2,683
Thanks for the link. Indeed, it explains clearly what all the modes are. But, oddly, it doesn't clearly...
Replies
7
Views
4,639

Welcome to SynoForum.com!

SynoForum.com is an unofficial Synology forum for NAS owners and enthusiasts.

Registration is free, easy and fast!

Trending threads

Back
Top