13.5 Adding Other Types of File System Partitions

NSS and Linux POSIX file systems can co-exist on a device. To create a NSS and Linux POSIX partitions on the same device, the first partition must be a Linux partition. In this mixed mode, you can have maximum 15 partitions. We recommend you to create four partitions only, if you are using DOS partitioned disks.

If the first partition on your device is a NSS partition, then you can not create a Linux POSIX file system partition on the same device.

Use NSSMU or the iManager Storage plug-in to manage NSS pools and volumes on OES. Use the NSSMU, NLVM, or iManager to create Linux POSIX file systems on the device.

Do not use YaST or LVM2 management tools to create or manage NSS pools and volumes. During the partition creation process, the YaST partitioner modifies the /etc/fstab configuration file to incorrectly identify NSS pools as Ext3 partitions instead of NSS partitions. This can make your system unbootable.

For example, a command like this is added to the /etc/fstab file for each NSS pool:

/dev/pool/poolname /nss/.pools/poolname ext3 defaults 1 2

where poolname is the name of the pool.

Instead of ext3, the partition type should be nss:

/dev/pool/poolname /nss/.pools/poolname nss defaults 1 2

To work around this problem when using the YaST partitioner, after you create a Linux POSIX file system and before you reboot your system, edit the /etc/fstab file to remove or comment out the lines that identify NSS partitions as Ext3 partitions.

To recover your system if you reboot your server before editing the /etc/fstab file:

  1. Boot your OES server in Single User mode.

  2. Mount the root (/) file system with the remount and read/write (rw) options by entering the following at a terminal console prompt:

    mount -n -o remount,rw /
  3. Edit the /etc/fstab file to do the following, then save the file:

    • If a line wrongly identifies an NSS partition as an Ext3 partition, correct the entry by changing ext3 to nss.

    • If a line wrongly identifies an NSS partition as an Ext3 partition, and if the entry duplicates a correct entry for the NSS partition, then remove or comment out the line that wrongly identifies the NSS partition as an Ext3 partition.

  4. Reboot the server to apply the changes.