User Guide

Troubleshooting the NetWare Server 135
Server Operating System Administration Guide
103-000148-001
August 30, 2001
Novell Confidential
Manual 99a38 July 17, 2001
some drivers can be loaded with parameters that speed the mirroring
process.
 Make sure the Enable Disk Read After Write Verify (Disk category) SET
parameter is set to Off.
Most disk drives provide their own form of read-after-write verification;
therefore, NetWare’s read-after-write-verify feature is not needed and can
increase the time required to mirror partitions.
 If the Maximum Concurrent Disk Cache Writes (Traditional File System
category) parameter is set at the default value or lower, try increasing the
setting.
IMPORTANT: Increasing the value too much can cause some disk controllers or
drivers to fail. You must experiment to see if a larger value speeds the mirroring
process.
If the problem still occurs, follow the troubleshooting steps in “Using a
Troubleshooting Methodology” on page 105, search the Novell
Knowledgebase (http://support.novell.com/search/kb_index.jsp), and contact
a Novell Support Provider.
Mirroring Stops Just Before It Is Finished
Sometimes, the mirroring process proceeds without error but stops at 99%
completion. To troubleshoot the problem, do the following:
 Check whether any faulty disk blocks exist.
If there are faulty disk blocks, troubleshoot and replace the disk if
necessary.
 Make sure you are using the latest disk drivers.
 Make sure there are no problems related with the hard disks or drivers you
are using.
For known problems with specific hard disks or drivers, contact the drive
vendor.
 If the Maximum Concurrent Disk Cache Writes (Traditional File System
category) parameter is set at its highest value, try reducing the setting.
If the problem still occurs, follow the troubleshooting steps in “Using a
Troubleshooting Methodology” on page 105, search the Novell
Knowledgebase (http://support.novell.com/search/kb_index.jsp), and contact
a Novell Support Provider.