MSExchangeIS (4284) SG06: An attempt to write to the file < log file> at offset 457216 (0x000000000006fa00) for 512 (0x00000200) bytes failed after 0 seconds with system error 21 (0x00000015): "The device is not ready. ". The write 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.
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