ETERNUS SF XL-DATA/MV V13 User's Guide

2.3.4 Connecting to Linux Systems

The following procedure explains how to connect the disk devices to a Linux system.

1. Connecting the FC-SCSI Card

Connect the Fibre Channel card to the server.

2. Connecting the FC Cable

Connect the Fibre Channel, which has just been connected to the server, to the disk array device (Fibre Channel switch/hub) with a cable.

3. Installing the FC Driver

Install the driver for the Fibre Channel card.

4. Recognize and configure the LUN

Linux will automatically recognize SCSI disks during the boot and sequentially assign logical units (LUN) from "/dev/sda".
Recognized LUN information is displayed in the console message during the boot. If it disappears, use the following command to check it.

less /var/log/dmesg

Up to 128 LUNs are supported in Linux by specifying the following to the "/etc/lilo.conf".



image=/vmlinuz
   label=linux
   root=/dev/sda1
   read-only
   append="max_scsi_luns=128"    <== add this

Whenever updating the "/etc/lilo.conf", use the following command to reflect the changes.

/sbin/lilo



5. Rebooting the system

Reboot the system to enable the settings relating to the connection of the disk array device.

# shutdown -r



6. Bind the LUN and character devices

Execute the raw command binding the LUN of the disk array device, which has been recognized in step 4 ("/dev/sda", etc.) to the character device so that it can be accessed as a raw device.



Binding the device recognized at "/dev/sda" to "/dev/raw/raw1".

# raw /dev/raw/raw1 /dev/sda

XL-DATA/MV accesses the character device ("/dev/raw/raw1") bound here.

This completes the connection of the disk array device.

Do not create a file system on the disk used as the data transfer volume.