White Papers

 iscsiadm: Open-iSCSI administration utility, included in the SLES software

distribution. Command line tool which allows: discovery of iSCSI targets;

 iscsid: Open-iSCSI daemon. Runs on the SLES server and provides block level

access to the PS Series storage array. Managed by the iSCSI service.

 Required SLES 11 package:

o open-iscsi-*: iSCSI daemon and utility programs

SLES 11 Device-mapper, Multipath I/O and Volume Management Components

 LVM2: provides logical volume management facilities.

 Device-mapper: component of the 2.6 linux kernel. An integral part of Multipath

I/O (Device Mapper Multipath).

 dmsetup: user space configuration tool for device mapper.

 multipath: the administration utility, part of the SLES software distribution.

Command line tool which allows configuration, removal and listing of

multipathed devices.

 multipathd: the multipath daemon. Constantly monitors the devices under its

control, and their paths. Activates or deactivates paths based on path condition

and failback policies.

 Required SLES packages:

o device-mapper-*: provides multipathing capability

o multipath-tools-*: automatic path discovery and grouping

Test configuration

Hardware

 Dell™ PowerEdge™ R610 server

 Four 1GbE interfaces: eth0, eth1, eth2, eth3

 Dell EqualLogic PS100 Storage Array

 GbE Switch and cables

Network/IP Addresses

 Server eth0 = 10.124.4.170 (data network)

 Server eth1 = not connected

 Server eth2 = 10.10.6.150 (storage network – path1)

 Server eth3 = 10.10.6.151 (storage network – path2)

 PS5000 Group IP = 10.10.5.7

 Gateway = 10.124.4.1

 DNS: primary = 172.16.1.27 : secondary = 172.16.1.7

 Netmask = 255.255.252.0 (all networks)

Software