disk_config primary / logical /home logical disk_config primary /tmp primary logical swap logical logical - logical /var logical primary -j -c ext2 ext3 format reiser -j ext2 -j ext2 -j ext3 ext3 primary /backup logical swap logical logical - logical /var logical primary disk_config primary / logical /home logical disk_config primary /tmp primary logical swap logical logical - logical /var logical primary -j -c ext2 ext3 format reiser -j ext2 -j ext2 -j ext3 ext3 Übersetzen!
ion">Dokumentation zur FAI Harddisk Konfiguration

class="anchor" id="line-5">

Das alte skript "setup_harddisks.pl" zur Festplattenpartitionierung wurde ersetzt durch das neue fai-setup-storage ( http://fai-project.org/doc/man/setup-storage.html).

Die Konfigurations files für die Festplatten stehen unter fai/disk_config/ und werden auch wie eine Klasse definiert. Zeile die mit einem # beginnen sind Kommentare.

Die folgenden Beispiele gelten nur für das alte Tool (setup_harddisks)!!!

Das folgende Beispiel ist eine konfiguration für eine IDE Hardisk "Primary Master" von Linux "hda" genannt. Und für die zweite SCSI disk genannt "sdb":

# <Type> <mount point> <Size in mb> [mount options]            [;extra options] hda 200          defaults,errors=remount-ro 100-300 /scratch1   10-          defaults,nosuid             ; -i 15000 -m 0 sdb 300-500      rw                          ;ext2 /backup     preserve2    rw 50-100 /scratch2   100-300      rw                          ;-m 30 preserve7 100                                      ;-j /var/tmp    preserve9                                ;format /tmp/mytmp  -300

Every disk configuration starts with the command "disk_config" followed by the Linux device name without "/dev/". After this command for each partition a line containing the type, mount point and size is added. Mount options and additional parameters for mke2fs -- separated from the mount options by a semicolon -- can be added.

Type: There are two types of partitions: primary and logical. Primary partitions are bootable, but there is a maximum of four primary partitions on each disk. The Linux root filesystem must be of this type. (Wirklich?)

All other partitions are called logical. Because logical partitions are gathered internally in one big primary partition, only three primary partitions can be used if logical partitions are defined. Normally only one primary partition for the root file system is created and all others are logical, like hda in the example above.

Mount point: The mount point is the full path (beginning with a slash) for the filesystem. The value "swap" defines a Linux swap partition. Both types will be automatically added to /etc/fstab. A dash "-" indicates that the partition will not be mounted and can be used for other types of filesystems (VAT, UFS, MINIX, ...)

Size: This is the size of the partition in megabytes. This value is rounded up to fit to a cylinder number. There are several forms to define the size:

"200" means about 200MB, no more no less
"100-300" sets a 100MB minimum and a 300MB maximum
"10-" sets a minimum of 10MB and a maximum of the disk size
"-300" sets a minimum of 1MB and a 300MB maximum

By default, a new filesystem (currently of type ext2 or swap) will be created, and all data on the partition is lost. The meaning of "preserve<no>" will be described later.

Calculating the partition size: If an interval is defined for several partition sizes, the script maximizes the values by preserving the ratio between them.

Mount options: The mount options will be copied to /etc/fstab. An empty field sets the option to "defaults" (see mount(8)).

Extra options: The last field is a space separated extra options list. The following options are known:

     -i <bytes>   : Bytes per inode (only ext2/3 filesystem) -m <blocks>  : Reserved blocks percentage for superuser (only ext2/3 filesystem) : Create the filesystem with an ext3 journal : Check for bad blocks : flag the partition as ext2 instead of auto in /etc/fstab : flag the partition as ext3 instead of auto in /etc/fstab : Always format this partition even if preserve : create a reiser file system, not an ext2

The order of the extra options is not relevant. For more information see mke2fs(8).

Thus, we have the following interactions between -j, ext2 and ext3 :

<no option> : an ext2 fs flagged as auto in the fstab : an ext3 fs flagged as auto in the fstab : an ext2 fs flagged as ext2 in the fstab : an ext3 fs flagged as ext2 in the fstab : an ext3 fs flagged as ext3 in the fstab : an ext2 fs flagged as ext3 in the fstab !!BAD!!

The use of auto in the fstab for ext3fs enable a non-ext3 enabled kernel or tool to cope with these partitions.

Preserving partitions:

It is possible to preserve the size of a partition or additionally to preserve the existing data on this partition. To preserve only the partition size, the number of the partition must be unchanged and the size must be specified as "preserve<no>". The number <no> is the device number (used by /dev/hda*, or see output of "df") of the partition. Primary partitions are numbered from one to four, the numbers for logical partitions begin at five.

Problems were reported (feb 2003) when using more than two primary partitions and trying to preserve a logical partition. It you have this problem, try to use only two primary partitions.

In this example, the partitions' numbers (= device number) are also shown for disk sdb:

primary   /tmp        300-500     #  1 preserve2   #  2 50-100      # (3)   5 /scratch2   100-300     # (3)   6 preserve7   # (3)   7 100         # (3)   8 /var/tmp    preserve9   # (3)   9 /tmp/mytmp  -300        #  4

The first two partitions are of type primary, so they get the numbers 1 and 2. The logical partitions start at 5 and the last gets number 8. All logical partitions define the primary partition 3, but this number is not used. So, if you want to preserve /dev/hda7 you have to insert a minimum of two logical partitions before it. asc@lap:/usr/doc/fai$ zcat README.disk_config.gz |more Documentation for hard disk configuration

The script setup_harddisks.pl partitions and formats the local disks. It uses all configuration files in /fai/disk_config/ which are also defined as classes. Lines beginning with # are comments. The following example is a configuration for the first IDE disk "hda" and for the second SCSI disk "sdb":

# <Type> <mount point> <Size in mb> [mount options]            [;extra options] hda 200          defaults,errors=remount-ro 100-300 /scratch1   10-          defaults,nosuid             ; -i 15000 -m 0 sdb 300-500      rw                          ;ext2 /backup     preserve2    rw 50-100 /scratch2   100-300      rw                          ;-m 30 preserve7 100                                      ;-j /var/tmp    preserve9                                ;format /tmp/mytmp  -300