Rebuild time is mostly based on system load, and number of drives.
I have 12x v5 systems that can sustain around 85kiops.
Each has one 12x 3.49TiB RI SAS12 drive array, and two 137x 5.46TiB 7200rpm SAS12 drive arrays.
On a system that averages 12kiops, rebuild of either array took about 13 hours, and copyback about 7H 50M.
On a system that averages 42kiops, rebuild of either array took about 15 hours, and copyback about 8H 8M.
Rebuild and Copyback for an array of 24x RI drives on a FS7200 should be roughly twice as fast.
Rebuild times for 15.36TiB drives should be roughly 4.4x as long.
So, your rebuild time should be about 31 hours, and your copyback time should be about 18 hours.
If your system is constantly under very heavy I/O, then I would expect those times to extend.
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JoshDaniel Davis
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Original Message:
Sent: Tue May 04, 2021 12:41 PM
From: Nick Slater
Subject: Re Build Times with SSD Failure
Can anyone help with the following
"What is the estimated DRAID6 array rebuild time following a 15.36TB RI SSD drive failure?"
I assume 2 pieces of info here.
How long to utilise the spare rebuild areas and recover a 24 drive array to 23 drives?
And then, after drive replacement, how long to redistribute to 24 drives?
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Nicholas Slater
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