Sometimes we need to add more space to a server. To get more space we create new virtual LUNs from our storage and present that LUN on the server to get the required space.
If you have added a new LUN to a server then you need to see that LUN or device on that machine. In HP-UX there is no need to reboot the machine or server.
You can easily rescan the LUNs/disks using the ioscan command and this is enough to detect the new devices.
ioscan output before adding the new LUN
| # ioscan -fnNC disk Class I H/W Path Driver S/W State H/W Type Description =================================================================== disk 3 64000/0xfa00/0x1 esdisk CLAIMED DEVICE HP Virtual LvDisk /dev/disk/disk3 /dev/disk/disk3_p2 /dev/rdisk/disk3 /dev/rdisk/disk3_p2 /dev/disk/disk3_p1 /dev/disk/disk3_p3 /dev/rdisk/disk3_p1 /dev/rdisk/disk3_p3 disk 4 64000/0xfa00/0x7 esdisk CLAIMED DEVICE 3PARdataVV /dev/disk/disk4 /dev/rdisk/disk4 disk 5 64000/0xfa00/0x8 esdisk CLAIMED DEVICE 3PARdataVV /dev/disk/disk5 /dev/rdisk/disk5 |
I have added a new LUN to this machine from 3PAR SAN storage. Now I want to see whether LUN added or not to this machine, I executed the below command which rescanned all the available disks and list them. The newly added disk is /dev/rdisk/disk17.
ioscan output after adding the new LUN
| # ioscan -fnNC disk Class I H/W Path Driver S/W State H/W Type Description =================================================================== disk 3 64000/0xfa00/0x1 esdisk CLAIMED DEVICE HP Virtual LvDisk /dev/disk/disk3 /dev/disk/disk3_p2 /dev/rdisk/disk3 /dev/rdisk/disk3_p2 /dev/disk/disk3_p1 /dev/disk/disk3_p3 /dev/rdisk/disk3_p1 /dev/rdisk/disk3_p3 disk 4 64000/0xfa00/0x7 esdisk CLAIMED DEVICE 3PARdataVV /dev/disk/disk4 /dev/rdisk/disk4 disk 5 64000/0xfa00/0x8 esdisk CLAIMED DEVICE 3PARdataVV /dev/disk/disk5 /dev/rdisk/disk5 disk 17 64000/0xfa00/0x2b esdisk CLAIMED DEVICE 3PARdataVV /dev/disk/disk17 /dev/rdisk/disk17 |
If this is not working, a suspect configuration like a presentation on the storage device or zoning on the switch, check your fibre cables also that are connected to the server.
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