Having problem installing SCSI tape drive

[KIN KWAN]

I'm trying to install a SCSI DD3 tape drive on my HPUX 10.20 server. However, when I run ioscan or reboot the server, it hangs until I disconnect the tape drive.

I'm pretty sure it's because it doesn't have an uique SCSI ID but how can I verify?

note: stape is installed.

Any help would be appreciated.

Kin

[A. Clay Stephenson]

With the DDS drive disconnected, do an ioscan -fn. Note the SCSI address of all the devices on the bus. The device nodes will have names something like /dev/XXX/cXtYd0. The 'Y' value will be the SCSI ID of existing devices. All of these devices will share a common 'X' value indicating they are on the same SCSI bus. Since you haven't bothered to mention the model of the server or the drive, it's not possible to be much more specific but the SCSI address can also be inferred from the H/W Path displayed by ioscan. You then need to simply choose an unused address and set the tape drive's address either by jumpers, DIP switches, or thumbwheel switch. You could also not be correctly terminating the bus or using the wrong SCSI architecture (e.g SE on an HVD bus)

[Steven E. Protter]

Shalom KIN,

You have identified and corrected the most common problem.

You have also identified the most likely problem left, the scsi ID.

Do a regular ioscan and you will see every scsi id on the system. Then all you need to do is set the tape drive to a number that is not in use.

Other useful threads:
http://www2.itrc.hp.com/service/james/dispDoc.do?docURL=http%3A%2F%2Fsearch.hp.com%2Fredirect.html%3Furl%3Dhttp%253A%2F%2Fforums1.itrc.hp.com%2Fservice%2Fforums%2Fquestionanswer.do%253FthreadId%253D181298%26qt%3D%252Bioscan%2B%252Bscsi%2B%252Bid%26hit%3D1&aid=SEARCH_FORUMS&pil=1&serStr=ioscan+scsi+id&pir=1

http://www2.itrc.hp.com/service/james/dispDoc.do?docURL=http%3A%2F%2Fsearch.hp.com%2Fredirect.html%3Furl%3Dhttp%253A%2F%2Fforums1.itrc.hp.com%2Fservice%2Fforums%2Fquestionanswer.do%253FthreadId%253D886340%26qt%3D%252Bioscan%2B%252Bscsi%2B%252Bid%26hit%3D5&aid=SEARCH_FORUMS&pil=5&serStr=ioscan+scsi+id&pir=5

Docs on this:
http://www2.itrc.hp.com/service/james/dispDoc.do?docURL=http%3A%2F%2Fsearch.hp.com%2Fredirect.html%3Furl%3Dhttp%253A%2F%2Fdocs.hp.com%2Fen%2FA5159-96003%2Fch02s06.html%26qt%3D%2Bioscan%2Bscsi%2Bid%26hit%3D5&aid=SEARCH_MANUAL&pil=5&serStr=ioscan+scsi+id
http://www2.itrc.hp.com/service/james/dispDoc.do?docURL=http%3A%2F%2Fsearch.hp.com%2Fredirect.html%3Furl%3Dhttp%253A%2F%2Fdocs.hp.com%2Fen%2FJ6373-90008%2Fch04s02.html%26qt%3D%2Bioscan%2Bscsi%2Bid%26hit%3D6&aid=SEARCH_MANUAL&pil=6&serStr=ioscan+scsi+id

SEP

[KIN KWAN]

First of all, I'm very pleasently surprise of the quick responses! Thank-you!

It is a HP-9000D server. The server has 3 SCSI controllers:

/dev/rscsi:
crw-r----- 1 bin sys 203 0x007000 May 30 1997 c0t7d0
crw-r----- 1 bin sys 203 0x017000 May 30 1997 c1t7d0
crw-r----- 1 bin sys 203 0x027000 May 30 1997 c2t7d0

I'm attaching a Sun DDS3 tape drive(http://www.pacificdata.com/599-2107-01.html) on SCSI controller "1" (/dev/rscsi/c1t7d0) and I'm setting the SCSI ID to '4'.

'ioscan fn' comes back with the following.. (condensed to only show SCSI devices)

Class I H/W Path Driver S/W State H/W Type Description
=======================================================================
disk 3 8/0.0.0 sdisk CLAIMED DEVICE HP C3586A
/dev/dsk/c0t0d0 /dev/rdsk/c0t0d0
disk 4 8/0.1.0 sdisk CLAIMED DEVICE HP C3586A
/dev/dsk/c0t1d0 /dev/rdsk/c0t1d0
disk 0 8/0.5.0 sdisk CLAIMED DEVICE SEAGATE ST32550W
/dev/dsk/c0t5d0 /dev/rdsk/c0t5d0
ctl 0 8/0.7.0 sctl CLAIMED DEVICE Initiator
/dev/rscsi/c0t7d0
disk 1 8/0.8.0 sdisk CLAIMED DEVICE SEAGATE ST32550W
/dev/dsk/c0t8d0 /dev/rdsk/c0t8d0
ctl 1 8/4.7.0 sctl CLAIMED DEVICE Initiator
/dev/rscsi/c1t7d0
tape 0 8/16/5.0.0 stape CLAIMED DEVICE HP C1537A
/dev/rmt/0m /dev/rmt/0mn /dev/rmt/c2t0d0BEST /dev/rmt/c2t0d0BESTn
/dev/rmt/0mb /dev/rmt/0mnb /dev/rmt/c2t0d0BESTb /dev/rmt/c2t0d0BESTnb
disk 2 8/16/5.2.0 sdisk CLAIMED DEVICE TOSHIBA CD-ROM XM-5401TA
/dev/dsk/c2t2d0 /dev/rdsk/c2t2d0
ctl 2 8/16/5.7.0 sctl CLAIMED DEVICE Initiator
/dev/rscsi/c2t7d0

As you can see, SCSI '4' is not being used nor is controller 1 has any SCSI devices attached to it. So technically, I should be able to assign any SCSI to the tape (except '7').

I can also verify that the tape drive is terminately. As for the SCSI architecture, I have no idea where to begin troubleshooting this...

Kin

[KIN KWAN]

SEP,

Your links does not seem to be working...I'm getting a blank page. Only the 3rd link to the HP documentation is works for me.

Kin

[Kent Ostby]

Do an ioscan on the system and check the bus you are trying to add the drive to.

Mske a list of the addresses that are used and then check your setting on the tape drive.

[A. Clay Stephenson]

It would have helped if you had not "improved" the ioscan output by editting but simply posted the output as is. Generally the line that best identifies a controller is the "ext_bus" line. You can probably see the part number of the controller on the back of the card where the cable connects. The part number will tell us whethere this is a SE or HVD SCSI controller. There are no LVD controllers available for a D box.

Because most DDS drives are SE-SCSI, I suggest that you leave the SCSI ID set to 4 and connect to the built-in SE-SCSI bus. This connector is next to the built-in parallel port on the back of the server. You probably have a terminator there now. Remove the terminator and connect your external drive and then place the terminator on your external drive.

[KIN KWAN]

Sorry for the late reply.. I haven't had time to try out the solutions.

You can close the case if really need to.