Hello there, Community!
This post is about the issue that disk space is insufficient. Please see more details below.

ISSUE DESCRIPTION
The disk space is insufficient due to oversized SQL Server transaction logs, resulting in a data connection or read/write error.
ANALYSIS
After the SQL Server is running for a period of time, operations generate massive transaction logs that are stored in the ldf file. As the file is increasingly large, the disk space is insufficient, resulting in a data connection or read/write error.
SOLUTION
1. Choose Start > All Programs > Microsoft SQL Server 2008 > SQL Server Management Studio. Log in to the SQL Server Management Studio.
2. Right-click a database node, such as BMU, with oversized transaction logs.
3. Choose Tasks > Shrink > Database and perform the operation.

