Technical Note - How to remove RAID 0 on FortiGate "Cannot disable RAID, device is used by: WANOPT".

[Jonathan_Body_FTNT]

Description

This article explains how to eliminate RAID 0 on the FortiGate when the "Cannot disable RAID, device is used by: WANOPT", error message displays.

Scope
FortiOS 4.0 and above.
Solution

The error message "Cannot disable RAID, device is used by: WANOPT" displays when there is HD configured for WAN Optimization.

The following steps can be used to check the parameter setting and disable it.

1. On the CLI of the FortiGate check the WAN Optimization storage as follows:

FGT1KB3909600062 # show wanopt storage
name storage name
FSM4 storage

FGT1KB3909600062 # show wanopt storage FSM4
   config wanopt storage
      edit "FSM4"
   set size 36055
next
end

2. Go to "config wanopt storage" and delete all profiles for WAN Optimization as shown below:-

FGT1KB3909600062 # config wanopt storage

FGT1KB3909600062 (storage) # show
   config wanopt storage
      edit "FSM4"
   next
end

FGT1KB3909600062 (storage) # del FSM4
change table entry 'FSM4'