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New RN314 / EDA500 Owner concerned about Resync times
Long time ReadyNAS NV+ owner, just recently purchased a RN314 (used) and EDA500. Right now I have 4 x WD40EFRX in each chassis.
Having just received new 4 x WD40EFRX for the EDA500 today, I installed them (have to love the new screwless tray design!) and went about creating a new RAID10 volume, in addition to the existing RAID10 volume on the RN314 - so I will ultimately have two RAID10 volumes.
The volume resync is currently crawling along on the EDA500 - 0.15% complete, remaining time is 2558:50:32.
Did I do something wrong in setup? These were new, shrinkwrapped drives...
Re: New RN314 / EDA500 Owner concerned about Resync times
Raid 5 can only tolerate one drive failure. If a second drive fails while you are rebuilding your raid5 array, you're toast. It's happened to me. My previous generation Seagates (ST2000DL003) dropped like dominos within days of each other on my readynas NV+.
Re: New RN314 / EDA500 Owner concerned about Resync times
@CDStoneley wrote: Appreciate the input, but performance was also a concern.
If the limitation is the eSata link, could I build the volume in the 314 then move all the disks to the EDA500?
Unfortunately, you can't destroy the volume while it is re-syncing. And if you just power down and remove the drives from the EDA500, there will be reminents of the EDA array in the configuration, and that could come back to haunt you. (I did have such a phantom, and it caused a big problem with the upgrade to 6.7.3.)
Maybe you can remove a drive from the array and make it crash and that will let you destroy it. Otherwise, you'd need to completely start over with the NAS as well as the EDA500 arrays to do that.
If you were starting fresh, I think there is a way to use the volume export feature to do what you want. But in the long run, the process would likely take at least as long as your current resync. And while you were doing it, you wouldn't have access to anything in the main array because it would be removed,
Re: New RN314 / EDA500 Owner concerned about Resync times
I've only gone with RAID5 on my EDA500, but the times were not even remotely similar to yours. It's hard for me to believe that RAID10 makes that much difference. Yes, it takes more writes for RAID10, but not that many. I think calling support is a good idea. But I'm also wondering if something might be wrong with one of the drives. Hope you get it ironed out.
Re: New RN314 / EDA500 Owner concerned about Resync times
For what it is worth my EDA500 with three 4TB drives took four days (96 hours) to resync/build. And the time estimates 'till completion improved significantly as it progressed. Have patience!
Also at some point -- if I recall at about 50% -- you should be able to look at the SMART stats for each drive in the array. But with a 314 the responsiveness of the management interface will be sloooow.
