hardware path information required

[Asim_5]

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...

[Robert-Jan Goossens · Accepted solution]

Hi,

c=controller
t=target
d=lun/disk

Robert-Jan

[Torsten.]

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.