4 drive in raid 5
There has been reports of problems using 4 large capacity drives in raid 5 on 4000. Most have dropped back to 3 drives with 1 spare. There have been some problems reported with some of the old units on 4.0.860, but mainly on the 2000's. I know the 4.0.860 uses more ram. You may consider add more ram. Turn off jvm if you are not using it, it requires a lot of resources.
MisterBill and poogles_uk are the 4000 experts.
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