Why couldn't I reattach my VJBOD pool after changing the remote LUN permissions?

Last modified date: 2025-11-27

Applicable Products

QuTS hero h6.0.0 or later
Storage Manager
iSCSI & Fibre Channel

Scenario

I had a working VJBOD storage pool on my local NAS. I safely detached the pool and disconnected the VJBOD connection from the iSCSI LUN on the remote NAS. Then, I changed the LUN's Access Control List (ACL) permissions from "Read/Write" to "Ready Only". When I tried to reattach the VJBOD pool on my local NAS, it fails. What should I do?

Root Cause

Because a VJBOD storage pool uses the remote LUN as if it were a local hard drive, the local NAS requires full read/write permissions to the LUN. When the remote LUN permissions are set to "Read Only," the remote NAS denies all write requests to the LUN, which causes your local NAS to fail to reattach the VJBOD storage pool.

Solution

Restore the LUN's ACL permissions to "Read/Write".
1. Log in to your remote NAS as an administrator.
2. Open iSCSI & Fibre Channel.
3. Go to iSCSI Permissions.
4. Click iSCSI ACL LUN.
  The iSCSI ACL LUN window opens.
5. Identify the LUN masking policy that affects your VJBOD connection.
6. Under Action, click .
  The Modify a Policy window opens.
7. Identify the iSCSI LUN used by your VJBOD storage pool.
8. Select Read/Write.
9. Click Apply.
Reattach your VJBOD storage pool.
1. Log in to your local NAS as an administrator.
2. Open Storage Manager.
3. Go to Storage Space > Disks.
4. Click ⋮ > Recover > Attach and Recover Storage Pool.
  After the system successfully reattaches the storage pool, the pool status changes to "Ready".
  You can check the pool status on the Storage Space page.

Important

To ensure normal NAS operations, we recommend always keeping read/write permissions for remote LUNs that are used for VJBOD storage pools on your local NAS.

Applicable Products

Scenario

Root Cause

Solution

Further Reading