EN added controller status checks for raid_hard

MegaCli -AdpBbuCmd -aALL 
for battery status

MegaCli -AdpAllInfo -aALL
for overall health

pages/cloud/dedicated/raid_hard/guide.en-gb.md

@@ -147,7 +147,28 @@ In this example, **/dev/sda** is the first RAID, and **/dev/sdb** is the second.
 > If one of your hard drives is showing SMART errors, you should perform a full backup of your data as soon as possible and contact our support team. Our support team will need the slot number and device ID in order to identify the faulty disk.
 > 
 
-#### Step 3: Resynchronising the RAID
+#### Step 3: Verify the health of the RAID controller
+To make sure, your RAID controller is working correctly, you can list all information with 
+```sh
+MegaCli -AdpAllInfo -aALL
+```
+
+The most important section of the output is the error counter:
+```
+Error Counters
+                ================
+Memory Correctable Errors   : 0
+Memory Uncorrectable Errors : 0
+```
+
+For a succinct output of only the errors, the command can be expanded by a grep:
+```sh
+MegaCli -AdpAllInfo -aALL | grep "Errors"
+Memory Correctable Errors   : 0
+Memory Uncorrectable Errors : 0
+```
+
+#### Step 4: Resynchronising the RAID
 
 If you had one or more hard drives replaced, the RAID will re-synchronise automatically. You can use this command to see which hard drives are currently rebuilding:
 
@@ -188,7 +209,7 @@ MegaCli -PDRbld -ShowProg -PhysDrv [EncID:SlotID] -aALL (Or : storcli /c0/eEncID
 The command will retrieve the enclosure ID and slot ID, as shown above.
 
 
-#### Step 4a: Using CacheCade
+#### Step 5a: Using CacheCade
 
 > [!primary]
 >
@@ -207,7 +228,7 @@ To see which RAID array is associated with the CacheCade:
 MegaCli -CfgCacheCadeDsply -a0 | grep "Associated LDs"
 ```
 
-#### Step 4b: Checking the status of the backup battery unit
+#### Step 5b: Checking the status of the backup battery unit
 
 to receive a full list of status parameters for the BBU, use this command:
 ```sh