HP-UX

Troubleshooting Cases for No Redundant Path of NMP Built in HP-UX

1. Check the controller enclosure type by referring to section "Connecting Cables" in the OceanStor 5300 V3&5500 V3&5600 V3&5800 V3&6800 V3 Storage System V300R003 Installation Guide. (You can download this document from Enterprise or Carrier. V300R003 is just used as an example, you can download the Installation Guide of the corresponding version from Huawei technical support website.) Then, check whether the controller enclosure is connected to application servers using redundant paths by referring to section "Connecting the Controller Enclosure to Application Servers."
   • If yes, go to step 3.
   • If no, go to step 2.

2. For disks having no redundant path displayed in the check result, on the CLI of the application server, run the scsimgr lun_map -D /dev/rdisk/diskxxxx command (xxxx indicates the disk ID and is obtained from the check result) and record the command output. Then, connect cables by referring to section "Connecting the Controller Enclosure to Application Servers" in the OceanStor 5300 V3&5500 V3&5600 V3&5800 V3&6800 V3 Storage System V300R003 Installation Guide. (You can download this document from Enterprise or Carrier.) And run the ioscan command to scan for disks during off-peak hours. After the command is executed, run the scsimgr lun_map -D /dev/rdisk/diskxxxx command again to check whether a path is displayed whose State and Last Open or Close state is UNOPEN and ACTIVE respectively or ACTIVE and ACTIVE respectively. Obtain path WWPN of each disk (Path WWPN is marked in red in Hardware path on the figure). On the CLI of the application server, run command ioscan -P health | grep yyyy (yyyy indicates disk path WWPN) to check whether all paths are online.

   

   

   

   

   • If yes, go to step 3.
   • If no, go to step 5.

3. For all disks having no redundant path, consult the user whether logical paths have been manually deleted.
   • If yes, go to step 4.
   • If no, no further action is required.

4. On the CLI of the application server, run the scsimgr lun_map -D /dev/rdisk/diskxxxx command (xxxx indicates the disk ID and is obtained from the check result) and record the command output. Then, run the ioscan command to scan for disks during off-peak hours. After the command is executed, run the scsimgr lun_map -D /dev/rdisk/diskxxxx command again to check whether a path is displayed whose State and Last Open or Close state is UNOPEN and ACTIVE respectively or ACTIVE and ACTIVE respectively.Obtain path WWPN of each disk . On the CLI of the application server, run command ioscan -P health | grep yyyy (yyyy indicates disk path WWPN) to check whether all paths are online.
   • If yes, no further action is required.
   • If no, go to step 5.

5. Collect related event information using InfoGrab, and send it to technical support engineers for further handling.