| Event Id | 442 |
| Source | ESE |
| Description | <process name> (<process id>) <storage group name>IO size mismatch on database <name>, IO size <value> expected while returned size is <value>. |
| Event Information | Explanation: An I/O error was encountered during a database operation. User Action: Review the disk and file. Use the Error.exe utility to resolve system errors. |
| Reference Links | Microsoft product: Exchange Version: 6.5.6940.0 Event Source: ESE Event ID: 442 |
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