question about devices and block numbers

Steven Stimpson steven2 at
Thu Nov 14 13:19:58 PST 2002

hello and thank you for reading this. someone on this lsit suggested to read 
the devices file in the linux documentation to get a better understanding 
of devices. as told i am doing that but now I have some questions. ill 
present thier graph below

 3 char Pseudo-TTY slaves
                  0 = /dev/ttyp0        First PTY slave
                  1 = /dev/ttyp1        Second PTY slave
                255 = /dev/ttyef        256th PTY slave

                These are the old-style (BSD) PTY devices; Unix98
                devices are on major 136 and above.

    block       First MFM, RLL and IDE hard disk/CD-ROM interface
                  0 = /dev/hda          Master: whole disk (or CD-ROM)
                 64 = /dev/hdb          Slave: whole disk (or CD-ROM)

                For partitions, add to the whole disk device number:
                  0 = /dev/hd?          Whole disk
                  1 = /dev/hd?1         First partition
                  2 = /dev/hd?2         Second partition
                 63 = /dev/hd?63        63rd partition

 Notice how it says 3 in the upper left hand coorner. so does that mean if I 
wanted to mknod the 63rd partition they talk about i would do mknod b 3 63?
Or does the three just refer to the fact that this is the third paragraph?
thanks for any info for the newbies...

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