# What Do I Do If an EVS Disk Attached to a Windows BMS Is in Offline State?

#### Symptom

After an EVS disk is attached to a Windows BMS, start Control Panel, choose System and Security > Administrative Tools, and double-click Computer Management. On the Computer Management page, choose Storage > Disk Management. The EVS disk attached to the BMS is in Offline state.

#### Solution

1. Log in to the Windows BMS.
2. Click Start, enter cmd in Search programs and files, and press Enter to open the command-line interface (CLI).
3. Type diskpart.

       C:\Users\Administrator>diskpart

4. Type san.

       DISKPART> san
       SAN Policy: Online All

5. Type san policy=onlineall.

       DISKPART> san policy=onlineall
       DiskPart successfully changed the SAN policy for the current operating system

6. Type list disk to display all disks of the BMS.

       DISKPART> list disk
       Disk ### Status    Size    Free     Dyn    Gpt
       Disk 0   Online   838 GB    0B
       Disk 1   Offline   838 GB    838 GB
       Disk 2   Offline   838 GB    838 GB
       Disk 3   Offline   838 GB    838 GB
       ...

7. Type select disk num. num indicates the disk number. Replace it with the specific disk number.

       DISKPART> select disk 4

8. Type attributes disk clear readonly.

       DISKPART> attributes disk clear readonly
       DiskPart succeed to clear disk attributes.

9. Type online disk.

       DISKPART> online disk
       DiskPart succeed to make the selected disk online.

10. After the modification, format the EVS disk.

Parent topic: Troubleshooting