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VTL Console Unable to Detect Allocated Storage Devices

Publication Date:  2015-07-31 Views:  48 Downloads:  0
Issue Description
Product and version information:

VTL6000 V100R003
VTL6900 V100R005

Physical storage devices are connected and allocated to the VTL server. After the VTL Console scans for physical resources, no allocated storage devices are found.
Handling Process
Cause 1: By default, the system scans for SCSI IDs ranging from 0 to 15. Therefore, if the number of storage devices is 16 or larger, the system cannot detect the storage devices.

1.  In the VTL Console's navigation tree, choose Physical Resources, right-click Storage Devices, and choose Rescan.

2.  Set the SCSI ID range to 0 to 254. Click OK to start scanning.

3.  In the VTL Console's navigation tree, choose Physical Resources and check whether the number of Fibre Channel devices is the same as that of the mapped storage devices.

4.  If the two numbers are different, rescan three times.

5.  If the problem persists, refer to the solution to cause 2.

Cause 2: The Fibre Channel port working modes of the storage device and the VTL server do not match.

1.  Use the SSH tool to log in to the VTL server.

     The default login user name and password are root and Admin@storage respectively.

2.  Run the cd /usr/local/vtl/etc/ command.

3.  Run the vi fshba.conf to check the Fibre Channel port mode of the VTL server.

#comment=Enable NPIV - N_Port ID Virtulization
#range=0(disable - Loop mode), 1(enable - P2P mode), 2(use current)
#=================
enable_npiv-hba0=0
enable_npiv-hba1=0
enable_npiv-hba2=0
enable_npiv-hba3=0
enable_npiv-hba4=1
enable_npiv-hba5=1


In the command output, 0 indicates Loop mode and 1 indicates point-to-point (P2P) mode If the VTL directly connects to the storage devices, change the Fibre Channel port's working mode to 0 (Loop mode). If Fibre Channel switches are used, change the Fibre Channel port's working mode to 1 (P2P mode).

4.  Type i to go to the Vi editing mode and change the Fibre Channel port's working mode based on the connection mode between the VTL and storage devices.

5.  Press Esc to enter the Vi command-line mode. Type :wq to save the change and exit the Vi editor.

6.  Run vtl restart all to restart all services of the VTL.

7.  In the ISM navigation tree, choose Device Info > Storage Unit > Ports. In the function pane, click FC Host Ports.

8.  Select a Controller ID whose port mode you want to modify and click Modify.

     The Modify FC Port dialog box is displayed.

9.  Change the Fibre Channel port's working mode of the storage device to a correct one.

10.  If the problem persists, contact R&D engineers.
Root Cause
Cause 1: By default, the system scans for SCSI IDs ranging from 0 to 15. Therefore, if the number of storage devices is 16 or larger, the system cannot detect the storage devices.

Cause 2: The Fibre Channel port working modes of the storage device and the VTL server do not match.
Suggestions
If the allocated storage devices are detected but cannot be accessed due to certain errors, view the event log on the VTL Console or run cd /var/log to check the system log in messages. In the log, check for error information related to rescanning operations and physical device faults.

END