Problem
Not able to mount a file system
mount -t vxfs -o cluster /dev/vx/dsk/sfsdg/S3fs1651234703 /vx/S3fs1651234703
UX:vxfs mount.vxfs ERROR: V-3-26149: Cannot mount /dev/vx/dsk/sfsdg/S3fs1651234703 due to lack of free soace
Error Message
UX:vxfs mount.vxfs ERROR: V-3-26149: Cannot mount due to lack of free space
Cause
As file system is completely filled up hence no space left
df -hP|grep S3fs1651234704
/dev/vx/dsk/sfsdg/S3fs1651234704 300T 300T 0 /vx/S3fs1651234704
As FileSystem is completely filled and no space left for metadata changes to take place and to do internal file system changes hence mount is failing
Solution
Move some files to other location after taking backup and create space in file system, once file system has space available mount works fine