every day i must type # mount -a in the workstation to mount the directory from the server .
note
1- fstab is very good no problem in it
2- the network in this workstation is stable
3- i check every thing in this workstation but i dont see any problem
4- the O.S RedHat 3u9
every day the user is restart the workstation and called me to type #mount -a
i need to know why this workstation not mount automaticly .
thanks a lot 
"I don't see any problem, but I have a problem. What's my problem?"
So much information in your post. 
I guess that you have a shared directory, somewhere in your network, and that you're trying to mount it at boot time.
Are you using the _netdev mount option in /etc/fstab, to wait for the network to be ready before trying to mount the remote directory?
If the above doesn't solve, how are your runlevels and daemons configurated?
What does dmesg say about mounts?
Can we see your /etc/fstab, and which is the problematic mount?
Bleeding edge, uh?
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Bye
GNU nano 1.2.1 File: /etc/fstab
LABEL=/ / ext3 defaults 1 1
LABEL=/boot /boot ext3 defaults 1 2
none /dev/pts devpts gid=5,mode=620 0 0
LABEL=/disk1 /disk1 ext3 defaults 1 2
LABEL=/disk2 /disk2 ext3 defaults 1 2
none /proc proc defaults 0 0
none /dev/shm tmpfs defaults 0 0
/dev/hda3 swap swap defaults 0 0
/dev/cdrom /mnt/cdrom udf,iso9660 noauto,owner,kudzu,ro 0 0
/dev/fd0 /mnt/floppy auto noauto,owner,kudzu 0 0
exp4900:/home /home nfs defaults 0 0
exp4900:/apps /apps nfs defaults 0 0
exp4900:/lmksys /lmksys nfs defaults 0 0
exp4900:/medt01 /medt01 nfs defaults 0 0
exp4900:/medt02 /medt02 nfs defaults 0 0
exp4900:/medt03 /medt03 nfs defaults 0 0
exp4900:/medt04 /medt04 nfs defaults 0 0
exp4900:/medt05 /medt05 nfs defaults 0 0
exp4900:/medt06 /medt06 nfs defaults 0 0
exp4900:/gulf01 /gulf01 nfs defaults 0 0
exp4900:/gulf02 /gulf02 nfs defaults 0 0
---------- Post updated at 04:35 AM ---------- Previous update was at 04:34 AM ----------
the problem is i must every day type command #mount -a
Have you already tried the possible solution I posted above?
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Bye