Hi there,

I have QLogic fibre channel card connected to a SAN. QLogic dynamic LUN discovery tools works fine and detects the new added volumes from the SAN (/dev/sg0 below) just fine without rebooting. However, the new volume doesn't get automatically mapped into SCSI device i.e. it doesn't have /dev/sdb mapping. If I reboot this happens automatically, but I cannot reboot these servers! Please help!

Both volumes are visible, verify with QLogic SanSurfer CLI tool:

scli -L 0
--------------------------------------------------------------------------------
HBA Instance 0: QME2472 Port 1 WWPN 20-01-00-22-19-40-53-E0 PortID 01-04-00
--------------------------------------------------------------------------------
Target WWPN 50-00-D3-10-00-0E-79-03 PortID 01-11-00
------------------------------------------------------------
Product Vendor : COMPELNT
Product ID : Compellent Vol
Product Revision : 0401
LUN : 0
Size : 10.00 GB
Type : SBC-2 Direct access block device
(e.g., magnetic disk)
WWULN : 60-00-D3-10-00-0E-79-00-00-00-00-00-00-00-00-16
OS LUN Name : /dev/sg0;
------------------------------------------------------------
Target WWPN 50-00-D3-10-00-0E-79-05 PortID 01-12-00
------------------------------------------------------------
Product Vendor : COMPELNT
Product ID : Compellent Vol
Product Revision : 0401
LUN : 0
Size : 160.00 GB
Type : SBC-2 Direct access block device
(e.g., magnetic disk)
WWULN : 60-00-D3-10-00-0E-79-00-00-00-00-00-00-00-00-0F
OS LUN Name : /dev/sda;/dev/sg1;
------------------------------------------------------------

The first volume doesn't get mapped to /dev/sdb like it should. How do your force this to happen? Do you force SCSI device re-scan or how do you make this happen?

Thanks for any help!

Double confirm with fdisk:

fdisk -l

Disk /dev/sda: 171.7 GB, 171798691840 bytes
255 heads, 63 sectors/track, 20886 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 20886 167662372+ 8e Linux LVM

Hi,

there is another tool to download from qlogic that i've used before.
The script is called ql-dynamic-tgt-lun-disc.sh .

I hope it could help you,

Cédric

This is the dynamic discovery tool I used, however it does not map the found volumes to the SCSI devices....

I have attached a file I found some time ago called scsi_rescan.txt
Make it executable and give it a whirl.

Attached Files

scsi-rescan.txt (5.8 KB, 19 views)

Thanks for the script... Still didn't work with this script, but I did get it working.

I went to the SAN, remapped the second volume as LUN 1 and the QLogic dynamic recovery script works just fine assigning the new volume as device. Previously I had both volumes as LUN 0.

Thanks.