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).