I've seen that happen when the storage pool that hosts the boot drive, has drives with mismatched models or firmware. check the storage configuration, see what drives you have in that pool.
I checked the drives and all of them are the same model and firmware.
no easy fix, then. I would next suspect that the SCM might be failing, but if it's more than three years old, you would be out of warranty. does the GUI show you the manufacture date of the SCM?
It does and it is out of warranty. The date on the SCM is from January of 2010.