User's Manual

SAN Manager LM Technical Bulletin Page 1 of 1
SAN Manager LM Technical Bulletin
I/O Retry Failure When Creating or Modifying the
Database
A problem has been found in the I/O retry logic used by SAN Manager LM’s database creation code.
All I/O retry attempts fail before they get sent to a target device. This means that if any I/O operation fails
during the database creation process or when the database is being modified, it will not be retried, and the
database creation/modification will fail.
Affected Products
This problem exists in SAN Manager LM 1.1 and 1.1.1 for Windows NT.
End User Experience
The end user might experience a failure when trying to create a database mirror set or add mirror set
devices to an existing database mirror set. They will notice the creation process proceeding but failing at
random points during the process.
The following are possible causes:
•
A component of the SAN hardware is unstable.
•
There is a hardware problem with the target device.
•
Another computer on the SAN caused a LIP (loop initialization process) which interrupted the database
creation/modification.
•
There is a large amount of traffic on the SAN.
To work around this problem, try to eliminate the source(s) of I/O errors and then retry the database
creation/database mirror set update procedure.
Overview
Causes and Solutions