herc wrote:
> On Jun 20, 11:13 am, "Richard B. Gilbert" <rgilber...@comcast.net>
> wrote:
>
>>herc wrote:
>>
>>>Hi folks, I have been trying to connect myD1000array with 4 disks to
>>>my ultra 10. It does not see disks at OK prompt with probe-scsi or
>>>show-disks commands.
>>>Neither does format utility see any disks other than the internal
>>>disk.
>>>I know the terminator and cable connections are all fine. I see the
>>>lights on disk array as I add disks to that.
>>>I make sure I power my disk array first and then the ultra 10.
>>>I tried the same with my ultra 2 and same issue! I have used the same
>>>disk array like 6 months back for Veritas and all and never gave me
>>>this problem.
>>>I am running Solaris 9 on the both ultra 10 and ultra 2.
>>>I have installed Veritas V.M but what to do when I can not see the
>>>disks in the array at O.S level... any idea what could make the sun
>>>box start seeing the disk array?
>>>TIA
>>
>>Something is DEAD! It could be your Host Bus Adapter (HBA), your
>>cable, your terminator, your disk array. . . .
>>
>> Ummm forget about your HBA; it didn't work on two different systems
>>so, unless you were using the same HBA, that can't be at fault.
>>
>>If you don't see the disks at OBP level; e.g. 'probe scsi' you have
>>a hardware problem somewhere!
>>
>>Do you have anything else you can plug into that bus? If you do and it
>>works, you have exonerated the bus, terminator, etc. Oh, make sure that
>>you have ONE terminator at each end of the bus. If the last drive on
>>the bus is terminated and you have an external terminator you will
>>almost certainly have problems! Also check addressing. Two drives
>>jumpered to the same bus address can produce strange problems.- Hide quoted text -
>>
>>- Show quoted text -
>
>
> On probe-scsi-all, it displays: BUS FAULT.
>
> What I have done is I have connected my Ultra10 with one scsi cable at
> extreme end and have placed a terminator right next to that. The
> terminator has a green light glowing (does that mean termination is
> okay?).
>
> I would apprecite if some one could answer the following for me:
>
> How do I know if the last drive is TERMINATED, because I am using a
> terminator?

Different manufacturers have done different things over the years.
Usually there's either a resistor pack on the drive's circuit board that
can be plugged in or not or there is a jumper that enables termination
in one position and disables it in another. If you play with the
hardware, you are supposed to know or you're supposed to pay someone who
does know to play with the hardware. The resistor pack is usually a
SIP (Single Inline Package) with ten or more pins, more for wide SCSI.

The instruction manuals and/or data sheets for the hardware should
mention this stuff somewhere. You may need the FE/CE documentation
since that's who normally does this sort of thing.

>
> How can I check addressing??? How do I know if two drives are jumpered
> to the same bus address?

There are typically three berg jumpers (those little plastic widgets
that fit over two pins) used to set the SCSI device address. In some
hardware the backplane slot you install the drive in determines the
device address. Do your drives just plug into a backplane or do you
attach a ribbon cable and a power cable to each drive?

FWIW, I've never seen a D1000; my hardware background is largely DEC.
As a Sun/Solaris hobbyist, I'm afraid a D1000 is probably out of my
price range!