Novell LINUX ENTERPRISE SERVER 10 - STORAGE ADMINISTRATION GUIDE FOR EVMS, Руководство администратора

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Troubleshooting EVMS Devices, RAIDs, and Volumes
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Troubleshooting EVMS Devices,
RAIDs, and Volumes
This section describes how to work around known issues for EVMS devices, software RAIDs,
multipath I/O, and volumes.
Š
Section 9.1, “EVMS Volumes Might Not Appear When Using iSCSI,” on page 89
Š
Section 9.2, “Device Nodes Are Not Automatically Re-Created on Restart,” on page 89
9.1 EVMS Volumes Might Not Appear When
Using iSCSI
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. This
problem is caused by EVMS starting before the iSCSI service. iSCSI must be started and running
before any disks/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.
1 At a terminal console prompt, enter
chkconfig boot.evms on
This ensures that EVMS and iSCSI start in the proper order each time your servers reboot.
9.2 Device Nodes Are Not Automatically Re-
Created on Restart
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:
1 Open the
/etc/init.d/boot.evms
script in a text editor.
2 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 /