unable to remove a disk(not present now in disk slot) appearing from ioscan -fnC disk

[cokehpux]

unable to remove this c3t0d0 from ioscan

# ioscan -fnC disk
Class I H/W Path Driver S/W State H/W Type Description
=============================================================================
disk 0 0/0/2/0.0.0.0 sdisk CLAIMED DEVICE _NEC DVD+-RW ND-6650A
/dev/dsk/c0t0d0 /dev/rdsk/c0t0d0

disk 1 0/1/1/0.0.0 sdisk CLAIMED DEVICE HP 73.4GMAX3073NC
/dev/dsk/c2t0d0 /dev/rdsk/c2t0d0
disk 17 0/1/1/0.1.0 sdisk CLAIMED DEVICE HP 73.4GST373455LC
/dev/dsk/c2t1d0 /dev/rdsk/c2t1d0

disk 427 0/1/1/1.0.0 sdisk CLAIMED DEVICE SEAGATE ST3146855LC
/dev/dsk/c3t0d0 /dev/rdsk/c3t0d0

rmsf -k /dev/rdsk/c3t0d0

rmsf -k /dev/dsk/c3t0d0

rmsf -H 0/1/1/1.0.0 

did this many times in various combinations. shutdown -hy 0, shutdown -ry 0 etc

insf etc

the disk re appears

9000/800/rp3440

has three slots

two for mirrored boot disks (HP)

another empty slot

inserted a SEAGATE disk and removed it (c3t0d0 thus got created in OS)

inserted another SEAGATE in the same empty slot

I get to see this

disk 427 0/1/1/1.0.0 sdisk CLAIMED DEVICE SEAGATE ST3146855LC
/dev/dsk/c3t0d0 /dev/rdsk/c3t0d0
disk 428 0/1/1/1.2.0 sdisk CLAIMED DEVICE SEAGATE ST3146855LC
/dev/dsk/c3t2d0 /dev/rdsk/c3t2d0

removed c3t2d0 disk from slot. - after some struggle managed to get rid of c3t2d0 from ioscan

but I am still unable to get rid of c3t0d0. 

any suggestions pls

[Duncan Edmonstone · Accepted solution]

Here's the IO map for the internal disks in the rp3440:

Slot                 Location            IO Path
0                    Bottom              0/1/1/0.0.0
1                    Middle              0/1/1/0.1.0
2                    Top                 0/1/1/1.2.0
CD or DVD            DVD Slot            0/0/2/0.0.0

If you want confirmation  the manual is here:

https://support.hpe.com/hpesc/public/docDisplay?docLocale=en_US&docId=c01404120

See p29

So the IO hardware path you mention - 0/1/1/1.0.0 is *not* any of the bays in the front of the rp3440. So you can pull and remove disks all day from the front of the rp3440, but it isn't going to effect that IO path and device.

However if you look at the table on p30 you will see that the hardware paths for that SCSI bus (0/1/1/1.x.y) are extended via a SCSI port on the rear of the rp3440. If you look at the photograph of the rear of an rp3440 on the bottom of p19 you will see a port at the bottom left labelled "SCSI LVD/SE" - my guess is you have something plugged into that running to an external disk chassis somewhere?

TL:DR - you've pulled the wrong disk.

[cokehpux]

Duncan - you're spot on !

yes there is HP Disk ystem 2120  connected at the rear.

that is why I am unable to get rid of that 0/1/1/1.0.0

That pdf doc link - is helpful too

Many thanks sir !

[Duncan Edmonstone]

You're welcome.

When it comes to identifying which disk is which, the age old method of using dd to read a stream of bytes off the disk is always useful:

dd if=/dev/dsk/c3t0d0 of=/dev/null

Then go look at the disk tray and the disk with a solid/heavily blinking activity light is your disk. Just use ctrl-c to interrupt the dd once identified