Virtual TapeServer 8.4 Configuration Guide

220 | Virtual TapeServer Configuration Guide
2. Confirm the Fibre Channel port is available and confirm that the Linux operating system sees
the LUN defined for the file system by the storage array. This command will list all SCSI
devices. From the VTS server command line, enter this command:
[root@VTS001 root]# sg_map -x
Here is the output:
/dev/sg0 1 0 4 0 1 /dev/st0
/dev/sg1 1 0 5 0 1 /dev/st1
/dev/sg2 1 0 6 0 8
/dev/sg3 4 0 0 0 0 /dev/sda
/dev/sg4 4 0 0 1 0 /dev/sdb
/dev/sg5 4 0 0 2 0 /dev/sdc
/dev/sg6 4 0 0 3 0 /dev/sdd
/dev/sg7 4 0 0 4 0 /dev/sde
3. If the No sg devices found message is displayed or partitions are missing, direct the
operating system to rescan for the devices on the Fibre Channel bus(es) from the console or
using an SSH command prompt. Enter the following commands:
[root@VTS001 root]# cd /usr/local/tape/bin/
[root@VTS001 bin]# ./rescan-scsi-bus.sh -l -c -r -w
Here is the output:
Rescanning /proc/scsi/qla2300/4...
Rescanning /proc/scsi/qla2300/5...
Removing /proc/scsi/qla2300/4, target 0, LUN 32
Scanning /proc/scsi/qla2300/4, target 0, LUN 32
scsi4 00 00 02 JetStor Volume R001 Direct-Access
scsi4 00 00 00 JetStor Volume R001 Direct-Access
scsi4 00 00 01 JetStor Volume R001 Direct-Access
scsi4 00 00 03 JetStor Volume R001 Direct-Access
scsi4 00 00 04 JetStor Volume R001 Direct-Access
If you cannot see the partitions after rescanning the SCSI connections, reboot the VTS server.
4. Start GFS as documented in "Powering hardware and starting a cluster" on page 206.