Interviewer: Lets say there is a partition of 100GB. When i
tried to create a file using touch command, under any
directory, it was unable to create the file- '100% full
disk space'. I calculated the size of each and every
directory on that partition mannually by adding each file
size & in came out to be total size 50GB. Then where is the
remaining 50GB ? why it is showing disk space 100% full
in 'df -h' command?
Answer Posted / kenji
One possibility is that there are many small size files. "Small" is relative to block size. For example the block size of ext3 file system is 4096. A file size of 4097 uses 2 blocks resulting 50% efficiency. This can explain why 100G partition gets disk full at 50G usage.
Another possibility is there are processes having large open files which are not linked. Such files are not visible by 'ls' commands but their usage still shows up by df -h.
At the event of 'disk full' I would check inode usage as well. Normally max inodes were allocated as "partition size / block size" so insufficient inodes rarely happens. typing 'df -i' doesn't cost you much :-)
I initially thought of "inode full" which you can check by df -i
Is This Answer Correct ? | 6 Yes | 1 No |
Post New Answer View All Answers
What is unix and its features?
Is unix cli or gui?
What is unix buffer cache?
Write down some common shells with their indicators?
How do I grep recursively in unix?
How do I remove 30 days old files in unix?
Is learning unix useful?
What is unix used for?
Is windows unix?
Is mac a unix system?
In what way the Fault Handlers and the Interrupt handlers are different?
If we are terminated at the middle of the program execution in UNIX,what will happen to the program, it will continue running r terminate r the o/p will be send to your mail?
Is a form of interprocess communication in unix?
You have a file called tonky in the directory honky. Later you add new material to tonky. What changes take place in the directory, inode, and file?
What is the root directory in unix?