单项选择题 The‘fsck-p/dev/lv00’commandreturnedthefollowingmessage：Notarecognizedfilesystemtype. Whatisthelikelycauseoftheproblemandhowshoulditberesolved？（）

单项选择题 An administrator is attempting to recover a filesystem that fails to manually unmount. The fsck command produces the following output： The current volume is： /dev/fslv02 File system is currently mounted.   Invalid file system size in the primary superblock. Invalid file system size in the secondary superblock.  Primary superblock is corrupt. Secondary superblock is corrupt.   fsck： 0507-018 Superblock is corrupt and cannot be repaired. Both primary and secondary copies are corrupt.Cannot continue tried to mount  Which steps will resolve the problem？（）

单项选择题 Whichcommandsynchronizesorrebuildsthelogicalvolumecontrolblock，thedeviceconfigurationdatabase，andthevolumegroupdescriptorareasonthephysicalvolumes？（）