This section describes how to work around known issues for EVMS devices, software RAIDs, multipath I/O, and volumes.
In the initial release of SUSE Linux Enterprise Server 10, DM-MP is not available for the boot partition, because the boot loader cannot handle multipath I/O. Therefore, we recommend you set up a separate boot (/boot
) partition when using multipathing. This issue has been resolved in Support Pack 1 and later.
The Linux rescue system does not automatically activate volume manager support for LVM or EVMS. For example, if you are using EVMS as the volume manager for your system device, you might not be able to see the device in order to mount it under the rescue system.
You must manually activate EVMS in order for the Linux rescue system to detect system devices that are managed by EVMS.
If you create volumes on EVMS devices and they cannot be found after you reboot the server, run chkconfig to make sure that evms_activate runs before FSTAB.
If you have installed and configured an iSCSI SAN, and have created and configured EVMS disks or volumes on that iSCSI SAN, your EVMS volumes might not be visible or accessible after reboot. This problem is caused by EVMS starting before the iSCSI service. iSCSI must be started and running before any disks or volumes on the iSCSI SAN can be accessed.
To resolve this problem, use the chkconfig command at the Linux server console of every server that is part of your iSCSI SAN to correct the order that iSCSI and EVMS are started.
Effective in SUSE Linux Enterprise 10, the /dev
directory is on tmpfs
and the device nodes are automatically re-created on boot. It is no longer necessary to modify the /etc/init.d/boot.evms
script to delete the device nodes on system reboot as was required for previous versions of SUSE Linux.
The following procedure is provided for users who might encounter this issue for SUSE Linux Enterprise Server 9 and earlier:
Open the /etc/init.d/boot.evms
script in a text editor.
Add the following lines to the Stop section:
mount -n -o remount,rw /
echo -en "\nDeleting devices nodes"
rm -rf /dev/evms
mount -n -o remount,ro /
For example, the Stop section looks like this after the edit:
stop)
echo -n "Stopping EVMS"
mount -n -o remount,rw /
echo -en "\nDeleting devices nodes"
rm -rf /dev/evms
mount -n -o remount,ro /
rc_status -v
;;
Save the file.
Continue with Section 2.1.3.5, “Restart the Server”.