topic Disk rebuild times in ONTAP Discussions

Disk rebuild times

muhammad_i_pasha — Thu, 05 Jun 2025 07:09:55 GMT

Hi - Does a disk rebuild (Normal or Rapid) also depends on the amount of data on the disk or aggregate. Or does the amount of data on the disk\aggregate doesn't effect the rebuild time?

Re: Disk rebuild times

adamfox — Thu, 26 Aug 2010 18:14:17 GMT

I would not expect the amount of data to affect the rebuild time. Clients accessing the data can certainly have an effect.

-- Adam Fox

Re: Disk rebuild times

govindan_kutty — Fri, 27 Aug 2010 04:04:23 GMT

There is no fixed number of hours for reconstruction time. This on many factors such as disk type, disk size, system load, options set with raid.reconstruct.perf_impact, number of drives in a raid group, type of raid etc.

Re: Disk rebuild times

pascalduk — Fri, 27 Aug 2010 09:15:35 GMT

You can find estimated rebuild and rapid recovery in chapter 6 of TR-3838. But that is for idle systems.

My experience is that for heavily loaded systems rebuild times can easily be 2-3 times longer.