Saturday, March 23, 2013

what is your insight about Linux file system?

Q. what can you say about linux file system compared to windows'?

A. You should say Linux Filesystem because there isn't a official one
The most common filesystems are ext2 (older), reiserfs(old), ext3(latest)
If you are refering to the directory structure the way Linux stores files then you can compare them
In Windows the root directory is C:\
In UNIX/Linux the root directory is \
In Windows the storage component are devices and accessible to a directory structure
In UNIX to open storage device you have to mount them to a destination before opening them
In terms of fragmentation it is lower because ext3 does not write to disk immediately but throws the data into journal back up
Then calculate the most optimal allocation before writing to final destination

How to reconize linux file systems on windows?
Q. I have both linux and windows working perfectly, but i'm not able to use the partition created for linux in windows. Linux has no problems in recognizing windows file systems. So please find me a way.

A. generally windows doesn't support linux file system( ext2,ext3 ), but you may be able access using some software like "ext2fs". you can download it from the given link "http://www.fs-driver.org/download.html"

How do you determine what Linux file system your using?
Q. When you log onto a Linux system and get to the command prompt, how can you determine which of the many file systems supported in Linux you are using? Is there a command that will identify it?

A. Use fsck with the N option which just show what would have been done, but also show you what type of filesystem it is.

fsck -N /dev/(device-name)

e.g.

fsck -N /dev/hdc2

The 'mount' command wont help if the filesystem isn't mounted, and looking in /etc/fstab wont help because you cant be sure that information can be trusted.



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