Why have my iSCSI targets become inaccessible after upgrading my NAS firmware?
Applicable Products
- iSCSI & Fibre Channel
- QTS 5.0 or later
- QuTS hero h5.0 or later
Symptom
After upgrading the NAS firmware from QTS 4.5 or earlier to QTS 5.0 or later, or from QuTS hero h4.5 or earlier to QuTS hero h5.0 or later, iSCSI initiators can no longer access iSCSI targets on the NAS, even though all NAS services are running normally.
Cause
In QTS 5.0 and QuTS hero h5.0, QNAP introduced a network binding feature in iSCSI & Fibre Channel. This feature allows users to specify which network interfaces on the NAS each iSCSI target can be accessed through.
When users configure these settings on an iSCSI target for the first time, the target is by default unbound to any network interface. This is true not only when you create a new iSCSI target, but also when you configure an existing target after upgrading the NAS firmware from a version without the network binding feature (QTS 4.5 or earlier, QuTS hero h4.5 or earlier) to a version that includes the feature (QTS 5.0 or later, QuTS hero h5.0 or later).
If you have existing iSCSI targets that were accessible before the firmware update, after the update the iSCSI targets become inaccessible to iSCSI initiators, because the targets are not yet bound to any network interface.
Solution
To make an iSCSI target accessible to iSCSI initiators in QTS 5.0 or later and QuTS hero h5.0 or later, you must bind the iSCSI target to a connected network interface on the NAS.
If you create a new iSCSI target, the creation wizard will guide you through the network binding step.
- Open iSCSI & Fibre Channel.
- Go to iSCSI Storage.
- Select an existing iSCSI target.
- Click Action > Modify.
- Click Network Portal.
- Select one or more network interfaces with a link connection.
- Click Apply.
The iSCSI target is now accessible to iSCSI initiators via the selected network interfaces.
