topic Re: how to get device path in Operating System - HP-UX

how to get device path

manasa_1 — Sun, 09 Mar 2008 04:08:52 GMT

Hello,
This is the section of code in tru64 to get the respective device path.
dev_name=$(hwmgr -view devices |grep DVD-ROM |awk '{print $2}')

how can i do it in hp-ux. i believe we need to use ioscan for this.but still i am not familiar with it.

Re: how to get device path

Jeeshan — Sun, 09 Mar 2008 04:25:00 GMT

If you want to see your DVD hardware path
issue this command

#ioscan -fnC disk|grep DVD

Re: how to get device path

Davis Paul — Sun, 09 Mar 2008 09:19:23 GMT

Hi Manasa,
#Ioscan -fn command output will give all Hardware installed in the system. For more details refer the man page of ioscan.

Regards,
Davis Paul

Re: how to get device path

Sajjad Sahir — Wed, 26 Mar 2008 08:39:07 GMT

if u want to see a list of hardware attache to your system before adding or deleting any device u can use ioscan command
for example
i added a disk from eva
now i want to see to
i can use ioscan -funC disk(here disk is a category
it will show claimed or not
once it is claimed it means it is loaded in the kernal
ohterwise u have to create device files
by using insf -e or insf -e disk
ok

Re: how to get device path

Sajjad Sahir — Wed, 26 Mar 2008 08:41:08 GMT

one more thing once u added a disk u have to use insf -e otherwise it will not claim
normally u can use ioscan -funC disk
then it will show all hardware path,class,driver etc...

Re: how to get device path

Venkatesh BL — Wed, 26 Mar 2008 08:54:21 GMT

In tru64, this would get the absolute file pathname of the given device.

Ex: /dev/disk/floppy0c (for a floppy)

In hpux, the ioscan output displays the path, but not on the same line.

Ex:

disk 3 0/0/2/1.3.0 sdisk CLAIMED DEVICE HP DVD-ROM 305
/dev/dsk/c1t3d0 /dev/rdsk/c1t3d0

Here the device path name comes in the line after the 'DVD' string. So, I think you may have to do some extra filtering to get the pathname correctly.

I am not aware of any ioscan option that displays it the tru64 way.

Re: how to get device path

Sajjad Sahir — Wed, 26 Mar 2008 08:59:13 GMT

manasa u have to assiang points to the peoples

Re: how to get device path

Shrikant Lavhate — Wed, 26 Mar 2008 10:14:35 GMT

Hi,

For getting hardware path of DVD you can use ioscan.

The third field in ioscan output is hardware path which you can extract using normal awk thing. Try:
#ioscan -fnC disk|grep -i DVD|awk '{print $3}'

Re: how to get device path

Bill Hassell — Wed, 26 Mar 2008 13:42:39 GMT

ioscan will (by default) query every driver in the system for every possible hardware device (which means slow). Always use the -k option for ioscan for instant response. Drop the -k when you add or delete devices without rebooting (advisable only with hotswap hardware).

The DVD may or may not have a SCSI ID string that says DVD since this string is provided from the drive manufacturer. You can limit the output to just disks with this command:

ioscan -kfC disk

Once you see the ID for the DVD, you can narrow the search using grep to match the string. If this is part of a general script to look at many machines, grep'ing for DVD will eventually overlook some devices because of their ID string. Try something like this:

ioscan -kfC disk | grep -ie dvd -e cd -e rom

That should get most all CD/DVD drives.

Re: how to get device path

WWarren — Fri, 06 Jun 2008 18:32:13 GMT

While the above answers are standard and can be found in the HP-UX FAQs, they are unsatisfying. Why? Because you are making assumptions about the ioscan output which may or may not be valid - you are at the mercy of whatever description the manufacturer puts there.

For example, I have an rx2600 with a DVD drive for which ioscan gives the output 'TEAC DV-28E-N'. Neither 'CD' nor 'DVD' nor 'ROM' are in the string. [And someday soon (maybe already?) there will be Blu-ray.]

There ought to be a better way to tell when scripting whether the sdisk device is a CD/DVD-type removable media disk or a 'regular' disk. Anybody have one?

Re: how to get device path

Torsten. — Fri, 06 Jun 2008 19:11:02 GMT

Well, as mentioned before, you cannot assume "DVD" or "CD_ROM" or anything in the name.

How about this?

This is an USB DVD drive in 11.31:

disk 7 0/0/2/1.0.16 UsbScsiAdaptor CLAIMED DEVICE USB SCSI Stack Adaptor
/dev/deviceFileSystem/Usb/MassStorage/dsk/disk@hp-1008+294=A60020000001
/dev/deviceFileSystem/Usb/MassStorage/rdsk/disk@hp-1008+294=A60020000001

But if I test my CD/DVD drive I get

# diskinfo /dev/rdsk/c1t2d0 | grep type
type: CD-ROM

for the disk I get

type: direct access

But do I really need a script for this?