Datasheet

“main” (Installation and Administration) — 2004/6/25 — 13:29 — page 19 — #45
i
i
i
i
i
i
i
i
1
Installation with YaST
Partition Types
Note
S/390, zSeries: Hard Disks
On IBM S/390 and zSeries platforms, SUSE LINUX Enterprise
Server supports SCSI hard disks as well as DASDs (direct ac-
cess storage devices). While SCSI disks can be partitioned as
described below, DASDs can have no more than three partition
entries in their partition tables.
Note
Every hard disk has a partition table with space for four entries. An entry
in the partition table can correspond to a primary partition or an extended
partition. Only one extended partition entry is allowed, however.
A primary partition simply consists of a continuous range of cylinders
(physical disk areas), assigned to a particular operating system. With pri-
mary partitions only, you would be limited to four partitions per hard disk,
because more do not fit in the partition table.
This is why extended partitions are used. Extended partitions are also con-
tinuous ranges of disk cylinders, but an extended partition may itself be
subdivided into logical partitions. Logical partitions do not require entries in
the partition table. In other words, an extended partition is a container for
logical partitions.
If you need more than four partitions, create an extended partition as soon
as the fourth partition (or earlier). This extended partition should span the
entire remaining free cylinder range. Then create multiple logical partitions
within the extended partition. The maximum number of logical partitions
is fifteen on SCSI disks and 63 on (E)IDE disks.
It does not matter which type of partitions are used for Linux. Primary and
logical partitions both work fine.
Required Disk Space
YaST normally proposes a reasonable partitioning scheme with sufficient
disk space. If you want to implement your own partitioning scheme, con-
sider the following recommendations concerning the requirements for dif-
ferent system types.
Minimal System: 500 MB No graphical interface (X Window System) is
installed, which means that only console applications can be used.
Also, only a very basic selection of software is installed.
19SUSE LINUX Enterprise Server