topic hardware path information required in Operating System - HP-UX

hardware path information required

Asim_5 — Fri, 30 May 2008 08:34:22 GMT

i want to know the meanings of device path

like when we do ioscan -fn disk
we get any disk or attached device name
like /dev/rdsk/c3t0d1

what does the c3t0d1 stands for??
wht i remember is c=controller and rest.....??

any one help...

Re: hardware path information required

Robert-Jan Goossens — Fri, 30 May 2008 08:42:48 GMT

Hi,

c=controller
t=target
d=lun/disk

Robert-Jan

Re: hardware path information required

Torsten. — Fri, 30 May 2008 12:29:58 GMT

In old fashion SCSI environments c is the controller instance, t the target (SCSI address) and d the disk or lun.

In SAN environments it is more or less the same, but since lun numbers could be very large, there are some internal rules for building the special device files.

To be sure what the LUN number is, you need to know the hardware path.