The first zero is associated with the dump command (I have no clear idea what it really does...) and the second zero indicates that the filesystem will not be checked at boot time, as Stinky pointed out above.
]]>what do these paras mean:
rw,auto,user,sync 0 0
Open your konqueror and type in
man:mount
/dev/discs/disc0/part5 /mnt/win_d vfat iocharset=utf8,codepage=936,rw,auto,user,sync 0 0
]]>#
# /etc/fstab: static file system information
#
# <file system> <dir> <type> <options> <dump> <pass>
none /dev/pts devpts defaults 0 0
none /dev/shm tmpfs defaults 0 0
tmpfs /tmp tmpfs defaults 0 0
usbfs /proc/bus/usb usbfs defaults 0 0
/dev/cdroms/cdrom0 /mnt/cd iso9660 ro,user,noauto,unhide 0 0
/dev/cdroms/cdrom0 /mnt/dvd udf ro,user,noauto,unhide 0 0
/dev/floppy/0 /mnt/fl vfat user,noauto 0 0
/dev/hda1 /mnt/win_c vfat iocharset=utf8,pagecode=936,rw 0 0
/dev/discs/disc0/part5 /mnt/win_d vfat iocharset=utf8,codepage=936,rw 0 0
/dev/discs/disc0/part6 /mnt/win_e vfat iocharset=utf8,codepage=936,rw 0 0
/dev/discs/disc0/part7 /mnt/win_f vfat iocharset=utf8,codepage=936,rw 0 0
/dev/discs/disc0/part8 /mnt/win_g vfat iocharset=utf8,codepage=936,rw 0 0
/dev/discs/disc0/part10 swap swap defaults 0 0
/dev/discs/disc0/part11 / reiserfs defaults 0 0
/dev/discs/disc0/part12 /var reiserfs defaults 0 0