Application Server cannot start after restart

Dear all,

I have a database cluster with SAP CI running on 2 servers(on SAN), plus 4 applications.

Today we have restarted all the servers, and found that only 1 server with database server and application server (w/CI) can start. All other applications servers cannot start, and in SAP Management Console, it does not show the SAP Instance.

Another problem is that the database cluster cannot move to another server, with error:

"initerrlog: Could not open error log file 'M:\Microsoft SQL Server\MSSQL.1\MSSQL\LOG\ERRORLOG'. Operating system error = 3(The system cannot find the path specified.)."

Can anyone provide any assistant? Many thanks!

Regards,

Daniel