iSCSI Remote Disk - Whole System Hangs

[nickd]

Hi All,

I have a TVS-663 with an iSCSI remote disk attached. Its shared out on the network as a QNAP Shared Folder (\\nas\share). All has been working fine for years and no changes have been made to either system in months. The iSCSI target LUN on the remote system is healthy, has terabytes of free space and healthy disks. For reference, the iSCSI target has several other LUNs connected to different systems and those continue working normally. The LUN connected to the QNAP is not shared by any other system.

A week ago, any attempts to access that remote disk (\\nas\share) will freeze both the QNAP and the client system. For example, just browsing to that share from a Windows client or simply opening QNAP File Station (before even clicking on anything) will hang up the QNAP. A reboot of the QNAP fixes the problem for a day or so but it always returns. At that point, everything looks normal with the data/performance/etc.

During a "hang", QNAP Storage & Snapshots > Storage > Remote Disk shows that the remote disk is "connected". Any attempt to disconnect it doesn't work. Trying to open "add virtual disk" won't even launch. So maybe the iSCSI initiator service is hung? I tried restarting the iscsi initiator service via SSH but the restart also hangs and never comes back online. Only a reboot helps. There's nothing reported in the event logs at all (on the QNAP or the remote system).

Does anyone know how to troubleshoot this from a QNAP perspective?

[dolbyman]

Sounds like an issue you want to have QNAP look into (open a ticket for that)