HP 3PAR SUSE Linux Enterprise Implementation Guide

(The SCSI midlayer will re-scan.)

# echo "scsi add-single-device 2 0 0 14" > /proc/scsi/scsi

You can see the new LUN presented to the OS by the SCSI Mid-Layer in the /var/log/messages

file.

kernel: Vendor: 3PARdata Model: VV Rev: 0000

kernel: Type: Direct-Access ANSI SCSI revision: 03

kernel: SCSI device sdac: 524288 512-byte hdwr sectors (268 MB)

kernel: SCSI device sdac: drive cache: write back

kernel: sdac: unknown partition table

kernel: Attached scsi disk sdac at scsi2, channel 0, id 0, lun 14

kernel: Attached scsi generic sg29 at scsi2, channel 0, id 0, lun 14, type 0

Dec 12 14:08:50 sqa-dell2850-01 scsi.agent[14234]: disk at /devices/pci0000:00/

0000:00:02.0/0000:01:00.2/0000:03:0b.0/0000:04:04.0/host2/target2:0:0/2:0:0:14

NOTE: The echo command needs to be executed on multiple host lpfc HBA SCSI instances

where LUNs have been exported.

Verifying Devices Found by the Host Using the Emulex HBA

To verify that the SUSE host has discovered the exported devices, look at the contents of the file

/proc/scsi/scsi. In this example, we have LUN 0 exported to the SUSE host through eight

paths (four HP 3PAR StoreServ Storage ports connecting to two Emulex HBA ports). This file should

contain entries for the attached devices:

# cat /proc/scsi/scsi

Attached devices:

Host: scsi0 Channel: 00 Id: 00 Lun: 00