Dirty shutdowns, minor file system inconsistencies and more, these are the common problems with Linux operating system. So at each boot, the criterion of fsck is meant for preventing the data loss problems with Linux. But contrarily, serious data loss issues have been seen, when the user loses power when fsck is on its way of routine checkup.
In some of the reports, when the user restarts the system, the partitions have been found to be inaccessible. This is the critical situation of data loss as whole of the data appear to come to an end. For the further investigation of the problem, when the user runs fdisk on the partition, similar warning may be seen:
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
Command (m for help): p
Disk /dev/hdb: 203.9 GB, 203928109056 bytes
255 heads, 63 sectors/track, 24792 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
Command (m for help):
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