Newsgroup: it.comp.hardware.scsi
Titolo: My SCSI Harddrive doesn't show up! HELP!

Hello,
    I'm new to SCSI as you might already be able to tell but I just got a
SCSI Adaptec 2940U2 Card with my new computer.  I am trying to install a
Seagate 50GB Harddrive onto that SCSI.  It uses the black 68pin I beleive to
install.  My question is I hooked it up, and when my computer loads I see it
listed as number 8, and when I go to system and Hardware, and disks I see it
listed, but when I go to my computer, its just not there.  There is no other
drive.  Please help me how do I use it????  Am I missing one important step
to the proccess?  How do I make it show up?  Any ideas on what causes this?
Do I have to format it and if so how if its not listed?
Thanks for your help ahead of time.
Please Email me the results and post them here so I don't miss the info i
really really need.  Thanks.
Doug Ellis
el...@flex.com
THANK YOU AHEAD OF TIME AGAIN!

Hi Doug,
There a number of possible reasons why your drive cannot be seen in windows.
Before you start- if you have valuable data on the drive, somehow back it
up- even if
it means that you have to install your hard disk in someone else's PC.
I presume that the drive is powered and the bus is properly connected (sorry
for being patronising), and that you have installed the correct drivers for
your U2W controller card
You may have to FDISK and FORMAT your drive, depending on the compatibility
of the previous system using using the problematic hard drive.
If not- Check your termination.  If your new drive is the last in line,
check you haven't inadvertently forgotten to remove the termination from the
previous device.  Remember that only the last device on the bus should be
terminated.
I had a weird problem with U2W.  I use IBM 9ES LVD drives which do not have
a termination jumper.  Although the drives worked fine unterminated on an
ultra wide bus, when I moved the drives to a U2W bus, all the drives became
unstable.  A resolution to this was to install an active terminator after
the last drive.  The reason why I say that this might be the problem is that
my drives "floated", and seemed to randomly appear and disappear- despite
being listed in the hardware manager.
Check that the total length of your SCSI cabling is within the specification
for the number of devices you are running.  I know this sounds crazy, but as
you increase the number of SCSI devices in your system, the more critical
the maximum allowable cable length becomes;   i.e. it is recommended that
you use shorter (more direct) cables between your SCSI hardware for systems
with many devices- despite what your local hardware store is willing to sell
you (and tell you!).
Check that your SCSI card is correctly terminated, and that the BIOS for
your hard drive is being installed at boot time.  Also check that the
negation rates, parity etc are compatible with the drive you are running.
Try resetting the SCSI card to it's defaults.
Check that the drive is coming up properly-  i.e. it's spinning and becoming
ready.  Place the blade of a medium sized screwdriver against the chassis of
your problematic hard drive (NOT ON THE CIRCUIT BOARD!), and press the
handle against your ear.  When the system starts you should hear the drive
spin-up and stabilise.  During this process you may find that the heads may
de-park have have a good rattling session.  The disk unit's direct drive
will product a distinctive "whine",  which should be at a constant pitch
during normal operation.
Check things run OK in DOS... Try changing the address of your drive- you
may be reading the jumpers upside down- recheck the address.  Use the SCSI
utilities on your SCSI card to ensure that the disk reports as you expect-
at the address you specified.  Also check for a conflict of SCSI addresses.
Like I said there are many potential reasons why you have this problem.
Unfortunately, such problems are really difficult to pinpoint without having
the machine right in front of you (or me).  Although this is quite
ambiguous, I hope it helps- this newsgroup can be dead as a donkey for
technical help sometimes.
Unfortunately you try the material in this document at your own risk.  I
cannot accept liability for failure or data loss (consequential or
otherwise), arising from the for use or misuse of the information in this
article.
Good luck-
Regards,
   Roger.
Doug Ellis wrote in message <380b8c76@coconut-wireless>...
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