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Initial sync after reset very slow
I have a 7 year old Ultra 2 Plus, with 2 x 2TB WD Green drives - this issue is with this box.
I have just got a new Readynass 214 with 4 x 2TB WD Red drives as RAID10 with flexraid. This is working...
Thanks for your advice and comment, much appreciated.
Its now 64.1 hours to go, 39.4% complete. Its been running now for 44 hours. This is the Ultra 2 plus (on OS6) with the 2 green drives.
I am beginning to think its not worth continuing with the old 7year old green drives, as this upgraded NAS will be a backup for the new one. I probably should just get 2 new red drives. If I start hooking up to a PC and runnnig tests that could take ages, and I guess would not improve the current position.
The time for the new nas to sync the new RN214 FelxRaid R10 was probably an over estimate, I cant remember the exact time, definitely over 12 hours.
This older NAS is the 2 bay, so I will probably get 2 x 4TB WD red drives for it. Form what you say that should sync in well under 24 hours, have I understood correctly?
I am not clear about this, and never used MDADM. I am looking for the simple solution that will be reliable, I thought mirroring was syncing!
It is possible to accelerate volume creation, by not bothering to sync at all (instead just mirroring as the sectors are written to the file system). It's possible that the MS system was doing that. However, MDADM doesn't.
lencw wrote:
Its now 64.1 hours to go, 39.4% complete. Its been running now for 44 hours. This is the Ultra 2 plus (on OS6) with the 2 green drives.
I am beginning to think its not worth continuing with the old 7year old green drives, as this upgraded NAS will be a backup for the new one. I probably should just get 2 new red drives. If I start hooking up to a PC and runnnig tests that could take ages, and I guess would not improve the current position.
Aging drives is the most plausible explanation, though I still do have a 4x2TB array in my old NV+ that has these early disks, and it is still working. I use it as a secondary backup.
Lifeguard shouldn't take that long, less than one day to fully test a healthy 2 TB disk.
lencw wrote:
This older NAS is the 2 bay, so I will probably get 2 x 4TB WD red drives for it. Form what you say that should sync in well under 24 hours, have I understood correctly?
Correct. That's an estimate based on other posts here - I don't own the ultra plus, and don't have 4 TB drives installed. My pro-6 is 6x3TB though, and it will resync a new drive in less than 24 hours. My newer NAS use 6 TB and 8 TB drives.
lencw wrote:
I thought mirroring was syncing!
With RAID-1 it is. MDADM takes a purist approach - it creates a virtual disk from the physical disks in the array, and initializes the volume so the two disks exactly match. The quicker way doesn't match them in the beginning, taking advantage of the fact that the content of the unused free space doesn't matter.
Though later on it is helpful if everything matches - especially if you want to test the volume integrity.
Now removed the 2 x 2TB WD Greens from the Ultra 2 Plus NAS, connected using the sata to USB adaptor (which I use fairly regualrly), but neither disc is recognised in Windows disk administrator. Both discs make a quiet clicking sound, no spin sound at all. I have not tried connecting directly to the sata connectors inside the PC, that will be a job for later. Maybe both discs are done, they were OK last week when copying off all the data. There are many reports of discs failing during a resync, could be that.
Now ordered 2 x 4TB Reds, hopefully they will be OK.
lencw wrote:
Now removed the 2 x 2TB WD Greens from the Ultra 2 Plus NAS, connected using the sata to USB adaptor (which I use fairly regualrly), but neither disc is recognised in Windows disk administrator.
Windows won't recognize them (since it doesn't support ext), but the disk administrator will see them. You could double-check with Lifeguard (just to see if it detects them). Or just let them go, since you've already purchased the new disks.
To end this story, I now have both NAS boxes in working order.
The Ultra 2 Plus upgraded to OS6, followed the instructions and it worked first time.
It took around 11 hours to sync the 2 new WD Red 4TB drives in the Ultra 2 Plus, on OS6.
Shares on the new 214 box are backing up using RSYNC to the Ultra 2 Plus, and a couple of shares I am using snapshots.
So all in all a good outcome.
One slight issue si with permissions and file access. OS6 is actually easier to use that OS4, far less confusing. I set up everyone access in network settings, leaving the file access section at default. However, after a few days away, I have come back to "access denied" when accessing shares on the 214. Rebooting the 214 and doing a "reset" in the file access section sorted it. Not sure what caused this nor how to prevent it again, but it is similar to issues with the Ultea 2 when I first seet that up.
So my initial issue can be considered sorted, it must have been the old drives.
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