SAN Manager LM Technical Bulletin
I/O Retry Failure When Creating or Modifying the Database
Overview
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.
Causes and Solutions
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.
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