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Conference noted::ibmpc-95

Title:IBM PCs, clones, DOS, etc.
Notice:Intro in 1-11, Windows stuff in NOTED::MSWINDOWS please
Moderator:TARKIN::LINND
Created:Tue Jan 03 1995
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:3023
Total number of notes:28404

2988.0. "Trashed my SCSI drive?" by IRNBRU::LITTLE () Tue Apr 15 1997 11:10

I was installing a game at the weekend and during the setup routine I 
was asked if I wanted the game to autodetect the sound card or manually 
enter the parameters. I chose autodetect and was given the warning
that using the autodetect facility might not work if there were SCSI
devices present. I ran the autodetect and the game hung with a blank 
screen. On rebooting, I could no longer see my SCSI drive - even the
SCSI controller couldn't detect the drive.
What has happened? Has the disk BIOS been trashed? Is it recoverable?


System config:

486DX4 100
Primary disk IDE
secondary disk SCSI
Sound Blaster 16

Stuart
T.RTitleUserPersonal
Name
DateLines
2988.1BHAJEE::JAERVINENOra, the Old Rural AmateurTue Apr 15 1997 13:171
    What operating system?
2988.2Sounds like a similar thread elswhere in here...NETCAD::BATTERSBYTue Apr 15 1997 14:267
    Sounds like the same type of problem discussed in another
    thread in the last day or so. The other thread I believe is
    the autodetect of a sound card by Win95 and how Win95 doesn't
    do well at autodetecting previously detected hardware, the
    second time around.
    
    Bob
2988.3Wish it was that simple.IRNBRU::LITTLETue Apr 15 1997 14:359
The problem is that when the PC boots the SCSI controller is detected 
(by the system BIOS) but it fails to see the SCSI drive. Therefore the 
operating system is irrelevant. I have tried booting DOS and attempting
to use FDISK but as I said, the SCSI controller can't see the drive. 
I've also booted WIN95 but it also sees the controller but not the 
drive. The controller isn't goosed as I have an old 20Meg SCSI drive 
and if I plug it in it is OK.

Stuart
2988.4BHAJEE::JAERVINENOra, the Old Rural AmateurTue Apr 15 1997 14:4314
2988.5TARKIN::LINBill LinTue Apr 15 1997 14:4713
    re: .3 by IRNBRU::LITTLE
    
    >> The problem is that when the PC boots the SCSI controller is
    >> detected (by the system BIOS) but it fails to see the SCSI drive.
    
    Not sure what SCSI host adapter you have, but unless you have SCSI BIOS
    support for DISKS, you won't see the disks until the operating system
    kicks in and loads a driver.
    
    >> The controller isn't goosed as I have an old 20Meg SCSI drive and if
    >> I plug it in it is OK.
    
    That would suggest there's something wrong with your disk.
2988.6IRNBRU::LITTLETue Apr 15 1997 16:118
The contoller is an NCR something or other (it's built into the 
motherboard). 
Normally the drive is detected by the bios (and displayed on the monitor)
as a conner xxxx on boot up - this doesn't happen with the trashed drive.
The drive does spin up and it comes ready but the controller just does
not see it.

Stuart 
2988.7just fishingTARKIN::LINBill LinTue Apr 15 1997 16:488
    re: .6 by IRNBRU::LITTLE
    
    Hi Stuart,
    
    Have you made sure the other SCSI-type details have been taken care of?
    e.g.  ID, termination, term power
    Does your NCR handle drives other than SCSI ID 0,1?
    
2988.8BHAJEE::JAERVINENOra, the Old Rural AmateurTue Apr 15 1997 18:3610
>The contoller is an NCR something or other (it's built into the 
>motherboard). 
    
    Presumably an NCR (or rather SYMBIOS) 53C810. The BIOS should handle
    two disks, and it should report all SCSI devices it sees. (It's the
    SCSI controller BIOS that does it, not the system BIOS).
    
    Seems like something wrong with the drive. Could you try the drive on
    another system?
    
2988.9IRNBRU::LITTLEWed Apr 16 1997 10:578
NCR 810 - that's it!

I am fairly sure it is the drive that is trashed since my other SCSI
drive works. What i was hoping for is that someone might have an idea
of what went wrong and if there is any way to recover the contents of 
the drive intact.
I don't have another machine with a SCSI controller so I'm stuffed to 
try drive in another machine 
2988.10And the drive is...,?PCBUOA::MCQUADEst*rs = 1x4x9Wed Apr 16 1997 14:436
    
    	What drive is it specifically and are you positive it spins up and
    is ready in time for the 810 to see it?
    
    
    Kevin
2988.11IRNBRU::LITTLEWed Apr 16 1997 15:2910
Kevin

I can't remember off hand exactly what type the drive is (conner 1.2 Gig)
but it's been in my system for about 2 years and worked perfectly ok 
until I let some poxy game autodetect the soundcard!
The drive definately spins up, appears to perform its self checks and 
appears to come ready - the led goes out after a couple of seconds of head
activity. All of this happens long before (well a few seconds) the SCSI 
card tries to detect the drive.
The drive is set as ID 0 and it is terminated.