The server ends a database update transaction for the specified client because an I/O error has been encountered by the server in writing to a device.
The specified session is ended and server operation continues.
Query the activity log to find messages preceding this one that specify the failing device. Storage pool volumes can be varied offline (by using the VARY command), or the server may need to be halted to correct the hardware problem. After the problem is corrected, the client should retry the operation.