Centos – how to skip ntpdate synchronization during boot on centos

Really the best way to do what you want is to insert a call to the script in the proper place in SysV init. I'd recommend that you write a script that calls your script, and cajole your sysadmin until he or she installs it in the proper place.

EDIT: Okay, I just read your other question, and I see that you are talking about a script that is fired asynchronously, when someone plugs in a device. What you want to do is check the runlevel to see if it's 2 (or whatever your default runlevel is if you've changed it, and also 1 if you want this to run in single-user mode.) If I'm reading the Debian FAQ correctly, the runlevel does not change to the default until the boot is complete.

fstab options /etc/fstab is a system configuration file and is used to tell the Linux kernel which partitions (file systems) to mount and where on the file system tree.

A typical fstab entry may look like this:

/dev/hda1 / ext3 defaults 1 1
/dev/hdb1 /home ext3 defaults 1 2

The 6th column (in bold) is a fsck options.
0 = Do not check.
1 = First file system (partition) to check;
/ (root partition) should be set to 1.
2 = ALL OTHER file systems to be checked.

But that is bad idea to stop checking disk . This is my mind.