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Forum Discussion
RN104 Extremely Slow Rebuild Time.
G'day,
I am trying to expand my RN104 and it is taking an extremely long time. It is set to X-RAID2, with 2 3TB drives. I have added a third, and it is taking an way to long to rebuild. So far it has been going for over a week (8 days actually) and it is still only 73% of the way through and says there is another 41 hours to go. My question is basically, should I just wait for it to finish?
From everything I have read, this does not seem like a typical rebuild time, so I am concerned there may be something else going on with the unit? If it is going to take this long to rebuild every time I need to replace a disk in the future, then that sort of defeats the purpose of a RAID?
A few more details,
I originally purchased the NAS, with the idea to use all the old spare Hard Disks I had accumulated in one big volume with some redundancy, for when they inevitably failed. After setting it up, and dealing with slow speeds and other instabilities, I realised the foolishness of that decision. So Is et it up, with just the 3TB WD Red, and the 3TB Seagate Barracuda I had lying around (in X-RAID2, i.e. RAID1). Big mistake, as the Barracuda drive was old, and on the way out. I got it all set up fine, but then the Seagate drive was showing increasing command timeouts, before it fell out of the array, and prompted a re-sync. Rather than wait for the resync to finish, I pulled the drive, and replaced it with another 3TB WD Red, and let it re-sync.
When that finished, and I had checked al the data was fine, I then added another drive, this time a 3TB WD GREEN. (I know it is not on the HCL, but the NAS only had 500GB free, and I had the 3TB Green lying around, so figured it would be right to chuck it in there.)
That was 8 days ago, and I am still waiting for it to finish reshaping the data. Is this normal? Can I expect it to take this long EVERTIME I try to expand the volume? Am I better of waiting for it to finish? Or backing up my data and doing a factory reset?
Is the problem the WD Green drive? Surely it can't be making the NAS take so long to expand?
I am trying to expand my RN104 and it is taking an extremely long time. It is set to X-RAID2, with 2 3TB drives. I have added a third, and it is taking an way to long to rebuild. So far it has been going for over a week (8 days actually) and it is still only 73% of the way through and says there is another 41 hours to go. My question is basically, should I just wait for it to finish?
From everything I have read, this does not seem like a typical rebuild time, so I am concerned there may be something else going on with the unit? If it is going to take this long to rebuild every time I need to replace a disk in the future, then that sort of defeats the purpose of a RAID?
A few more details,
I originally purchased the NAS, with the idea to use all the old spare Hard Disks I had accumulated in one big volume with some redundancy, for when they inevitably failed. After setting it up, and dealing with slow speeds and other instabilities, I realised the foolishness of that decision. So Is et it up, with just the 3TB WD Red, and the 3TB Seagate Barracuda I had lying around (in X-RAID2, i.e. RAID1). Big mistake, as the Barracuda drive was old, and on the way out. I got it all set up fine, but then the Seagate drive was showing increasing command timeouts, before it fell out of the array, and prompted a re-sync. Rather than wait for the resync to finish, I pulled the drive, and replaced it with another 3TB WD Red, and let it re-sync.
When that finished, and I had checked al the data was fine, I then added another drive, this time a 3TB WD GREEN. (I know it is not on the HCL, but the NAS only had 500GB free, and I had the 3TB Green lying around, so figured it would be right to chuck it in there.)
That was 8 days ago, and I am still waiting for it to finish reshaping the data. Is this normal? Can I expect it to take this long EVERTIME I try to expand the volume? Am I better of waiting for it to finish? Or backing up my data and doing a factory reset?
Is the problem the WD Green drive? Surely it can't be making the NAS take so long to expand?
13 Replies
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- Well, it happened again.
With increasing load cycle counts on the WD Green (as to be expected - was hoping it would be alright), I decided to replace it with a Seagate NAS HDD. I removed the WDGreen, inserted the Seagate NAS HDD, and let it resync overnight. After 13 hours, it is still only at 7.15% and is saying it has 140 hours to go.
I powered down the NAS, removed the Seagate NAS HDD, and reinserted it (same caddy, same slot), and now it seems to be resyncing fine. In a couple of minutes it has already got to 7.34% and says it only has about 24 hours or so to go (Which is about the time I would expect for an RN104).
I am I inserting the disks wrong? Or is there likely to be something wrong with my NAS? - Now I must say I am really a bit confused.
After restarting the NAS, the reassign finished much faster than I was expecting.
After taking 13 hours to do the first 7.3%,
The remaining 92.7% finished in 10 hours,
For a total rebuild time of about 23 hours - pretty much bang on what you would expect with an RN104 resenting 3 3TB Drives in Raid5.
So now I am wondering if maybe there wasn't anything wrong with the NAS, it was just reporting an extremely slow rebuild time, which would have sped up, even if I didn't shut down, reseat the drive, and reboot?
As I tried to say earlier, resync is a low priority task, and anything else the NAS is doing will stall it. Estimated completion times are often a lot longer than actual.meverz wrote: So now I am wondering if maybe there wasn't anything wrong with the NAS, it was just reporting an extremely slow rebuild time, which would have sped up, even if I didn't shut down, reseat the drive, and reboot?
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