When creating an NSS pool on Linux, you can use free space only from devices managed by EVMS. If you use multiple volume managers, make sure that the devices you select for the pool are managed by EVMS.
The OES Linux install uses LVM, but NSS requires EVMS. The Linux 2.6 kernel prevents multiple volume managers from managing the same device. If you use LVM and EVMS to manage different devices on the server, EVMS might display free space on the LVM-managed devices that EVMS cannot actually manage.
To avoid confusion, you can prevent display of space that is unavailable to EVMS. Edit the /etc/evms.conf file to add the device to the exclude list of the sysfs_devices section.
For example, in a typical OES Linux install, the hda device is your boot device and contains the root volume. Unless you have previously made EVMS the volume manager for that device, it is managed by LVM and cannot be used to create NSS pools. To prevent the display of space from hda, edit the /etc/evms.conf file as follows:
sysfs_devices {
...
exclude = [hda]
}
To exclude multiple devices (such as /dev/hda and /dev/hdb), use the following format:
exclude = [hda hdb]