This fix introduces the supports for Exchange Server 2010 page patching when a "-1022" disk I/O error is generated

Microsoft Exchange Server 2010 high availability introduces a new Extensible Storage Engine mechanism known as page patching. When a database corruption is caused by minor disk faults, Exchange Server 2010 page patching automatically repairs the corrupted database by using one of the database copies that are configured for high availability. This fix introduces the supports for page patching when the Extensible Storage Engine "-1022" disk I/O error is generated.
Note The Extensible Storage Engine "-1022" disk I/O error may be found in the following events in the Application event logs:

Event ID: 481
Category: Error
Source: ESE
Description:
Information Store <PID #> An attempt to read from the file "<database file>" at offset xxxx (xxxx) for 4096 (0x00001000) bytes failed with system error 21 (0x00000015): "The device is not ready.". The read operation will fail with error -1022 (0xfffffc02). If this error persists then the file may be damaged and may need to be restored from a previous backup.

Event ID: 482
Category: Error
Source: ESE
Description:
Information Store <PID #> An attempt to write to the file "<database file>" at offset xxxx(xxxx) for 4096 (0x00001000) bytes failed with system error 21 (0x00000015): "The device is not ready." The write operation will fail with error -1022 (0xfffffc02). If this error persists, the file may be damaged and you may have to restore it from a previous backup.

To resolve this problem, install the following update rollup:

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

For more information about Exchange Server 2010 high availability and page patching, visit the following Microsoft Web site: