IBM SCSI Disk and HPUX 11.0 on r2470 server

[Cristi BODNARIUC]

Hi, I have an IBM SCSI disk and I want to install it as an external disk, but the system does not see it.

It is an IBM Ultrastar, 18GB
Model: IC35L018UWD210-0

and the OS is HPUX 11.0 on a r2470 server (PA)

Is it possible that the disk is not compatible with my system?

Thanks,
Cristi

[Steven E. Protter]

Welcome to the world of proprietary hardware.

It is unlikely that this disk will work.

If you are to have any chance, you'll need to make sure the SCSI id of the drive and the controller you are hanging it off are consistent.

SEP

[Pete Randall]

SCSI is SCSI. There shouldn't be any proprietary involved here. Look for a SCSI ID conflict.


Pete

[A. Clay Stephenson]

There are several possibilities.

1) The drive is LVD (Low Voltage Differential) SCSI. Are you sure that you are connected to a LVD controller? Both HVD and LVD controllers are available for your box so that could be your problem?

2) Duplicate SCSI ID's?

3) Proper termination and terminator power?

Do an ioscan -fn and see if the device is listed there. If so, but you see no device nodes then run insf to create them.

A posting of the ioscan -fn plus the scsi ID that you have set would prove useful.

You should be able to use this puppy as an external non-boot drive so long as the above conditions are met.

[Pete Randall]

Also make sure that the differential is the same on the card and the disk: i.e. HVD to HVD, or LVD to LVD.


Pete

[Helen French]

Need more information. How do you connect this external disk? which controller are you using? Is the controller compatible with disk (same type of SCSI)? is the SCSI ID conflicting?

There is no problem in attaching an IBM disk to the HP server. Actually if you check the "vendor" on most of the disks on the HP disk arrays, it will say IBM!

[Paula J Frazer-Campbell]

HI


This should help:-


http://ssddom01.hgst.com/tech/techlib.nsf/techdocs/C050ACD81834E70F87256B1200749854/$file/U73LZX_com.pdf

Check the Jumper settings.

Paula

[Cristi BODNARIUC]

Hi,

thanks all for your prompt responses.

here is the output of ioscan.
I set the SCSI ID to 1.

It should be ok as long as I connected the disk in place of the DVD drive which also had SCSI ID 1 and worked.

I connect the disk on the single ended conector (I presume it is LVD) and the disk terminator has a green light (which also I think that means LVD)

ioscan -fn
Class I H/W Path Driver S/W State H/W Type Description
============================================================================
root 0 root CLAIMED BUS_NEXUS
ioa 0 0 sba CLAIMED BUS_NEXUS System Bus Adapter (582)
ba 0 0/0 lba CLAIMED BUS_NEXUS Local PCI Bus Adapter (782)
lan 0 0/0/0/0 btlan3 CLAIMED INTERFACE HP PCI 10/100Base-TX Core
/dev/diag/lan0 /dev/ether0
ext_bus 0 0/0/1/0 c720 CLAIMED INTERFACE SCSI C896 Ultra Wide LVD
target 0 0/0/1/0.7 tgt CLAIMED DEVICE
ctl 0 0/0/1/0.7.0 sctl CLAIMED DEVICE Initiator
/dev/rscsi/c0t7d0
ext_bus 1 0/0/1/1 c720 CLAIMED INTERFACE SCSI C896 Ultra Wide Single-Ended
target 1 0/0/1/1.7 tgt CLAIMED DEVICE
ctl 1 0/0/1/1.7.0 sctl CLAIMED DEVICE Initiator
/dev/rscsi/c1t7d0
target 2 0/0/1/1.15 tgt CLAIMED DEVICE
disk 0 0/0/1/1.15.0 sdisk CLAIMED DEVICE HP 36.4GMAM3367MC
/dev/dsk/c1t15d0 /dev/rdsk/c1t15d0
ext_bus 2 0/0/2/0 c720 CLAIMED INTERFACE SCSI C875 Fast Wide Single-Ended
target 3 0/0/2/0.7 tgt CLAIMED DEVICE
ctl 2 0/0/2/0.7.0 sctl CLAIMED DEVICE Initiator
/dev/rscsi/c2t7d0
ext_bus 3 0/0/2/1 c720 CLAIMED INTERFACE SCSI C875 Ultra Wide Single-Ended
target 4 0/0/2/1.7 tgt CLAIMED DEVICE
ctl 3 0/0/2/1.7.0 sctl CLAIMED DEVICE Initiator
/dev/rscsi/c3t7d0
target 5 0/0/2/1.15 tgt CLAIMED DEVICE
disk 1 0/0/2/1.15.0 sdisk CLAIMED DEVICE HP 36.4GMAM3367MC
/dev/dsk/c3t15d0 /dev/rdsk/c3t15d0
tty 1 0/0/4/0 func0 CLAIMED INTERFACE PCI BaseSystem (103c128d)
tty 0 0/0/4/1 asio0 CLAIMED INTERFACE PCI Serial (103c1048)
/dev/GSPdiag2 /dev/mux0
/dev/diag/mux0 /dev/tty0p1
ba 1 0/2 lba CLAIMED BUS_NEXUS Local PCI Bus Adapter (782)
ba 2 0/4 lba CLAIMED BUS_NEXUS Local PCI Bus Adapter (782)
ba 3 0/6 lba CLAIMED BUS_NEXUS Local PCI Bus Adapter (782)
memory 0 8 memory CLAIMED MEMORY Memory
processor 0 160 processor CLAIMED PROCESSOR Processor

[Gregory Fruth]

The drive you're talking about is Ultra160 SCSI (i.e. Ultra3 speed,
wide bus, low-voltage differential). Your server seems to
have a plethora of SCSI buses: 2 Ultra Wide Single-ended (UWSE),
1 Fast Wide Differential (FWD), and 1 Ultra Wide Low-voltage
differential (LVD). It is critical that you be able to identify which
connector on the backplane corresponds to which SCSI bus.
If you plug a FWD device into one of the other buses (or vice-
versa) it can damage the device, the SCSI controller card, or
both. If you plug a UWSE device into an LVD bus or
vice-versa, the config will work but you'll get sub-optimal
performance.

The connectors can look very similar, and in fact I believe the
connectors in your case will all look identical. However, the
connectors on the backplane should be labelled. If not, then
you may have to open the machine to identify the buses.

For optimal performance you should plug the disk drive into
the LVD bus on your machine -- your DVD was probably
attached to the UWSE bus. The disk drive ought to work
on that bus but the config is sub-optimal.

Also, if the SCSI cable is very long you can run into signal
strength problems on UWSE -- the drive may not work or
may only work intermittently.

HTH