Novell LINUX ENTERPRISE SERVER 11 - DEPLOYMENT, Руководство по развертыванию

Страница: 57 / 322

CD ROM or Server from the action menu. Provide information as requested on subse-
quent windows.
Load from SCSI-Attached DVD
To IPL from a SCSI DVD, you need access to an FCP adapter connected to a DVD
drive. You need values like the WWPN and LUN from the SCSI drive. For details, see
Section “IPL from FCP-Attached SCSI DVD” (page 54).
4.1.4 The IOCDS
This section provides some necessary information about the IOCDS and how to cus-
tomize some settings for sharing network cards or DASDs among several LPARs. In
the IOCDS, the
chpid
and types of the devices connected to the IBM System z are
defined. The resources can be dedicated or shared among LPARs.
WARNING: Sharing Devices (DASD)
Do not share DASD writable among LPARs because this might result in data
loss. Consider the definition of the necessary resources in advance when plan-
ning the setup for SUSE Linux Enterprise Server on IBM System z.
This example shows how to dedicate a DASD to one specific LPAR. This LPAR is
referred to as
LPAR1
.
Example 4.1 Dedicating DASD to One LPAR
CHPID PATH=FD,TYPE=DSD,SHARED
CNTLUNIT CUNUMBR=FD00,PATH=FD,UNITADD=((00,256)),UNIT=3990-2
IODEVICE ADDRESS=(FD03,1),CUNUMBR=FD00,UNIT=3390,PART=LPAR1
To share a DASD among LPARs, delete the
PART=LPAR1
part in the IOCDS definition.
This might be useful for high availability reasons or for sharing data among LPARs
read-only.
Several Linux systems can use the same network device if you share it among LPARs
or z/VM guests. This reduces the number of network devices that must be provided to
the Linux system. On the other hand, you might provide more than one network device
to one Linux system to make it more available in case one connection fails.
Installation on IBM System z 45