V$ASM_FILESYSTEM displays information for every mounted Oracle ACFS.
Mount point (primary key)
Mount time or the time that the file system became available again; NULL if the file system is not available
File system block size (in kilobytes)
File system status::
OFFLINE - Either the ASM instance is down, the disk group has been forced dismounted, or less commonly, a metadata I/O failure occurred or serious metadata corruption was detected. In the case of a metadata I/O failure, the file system is also marked as corrupt. An offline file system can only be unmounted; other attempts at access result in errors.
Indicates whether the file system needs the fixer (fsck, acfschkdsk) to be run (TRUE) or not (FALSE)
Number of volumes in the file system
Total capacity of the file system (in megabytes)
Total free space in the file system (in megabytes)