HP-UX: Understanding device file naming convention

Both HP-UX and Sun Solars uses almost same device file naming convention. Typically it look like as follows:

c#t#d#

Let us try to understand what those letters

  • c – Instance number of interface card
  • t – SCSI target address
  • d – Device number aka SCSI LUN

Use ioscan command to get information about your device under HP-UX. A block device file is always in /dev/dsk and a character device file in /dev/rdsk directory.

  • /dev/dsk/c0t5d0 – Block device file
  • /dev/rdsk/c0t5d0 – Raw device file

I just wish both of them were use device file naming convention like linux (/dev/sda1).

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