[svlug] scsi problem

[Javilk]

> 
> In message <2.2.32.19981121005529.00a3d754 at shell3.ba.best.com>, Ray Olszewski w
> rites:
>  ] Anyone know of a reason why an HP SureStore 2000 LP (aka C3725S) hard disk
>  ] might have trouble connecting to an Adaptec 1520A? 
>  ] 
>  ] The Adaptec seems to be unable to detect that the drive has spun up. Liux
> 
> Excuse me for asking the obvious question, but I've got to -- has the
> drive in fact spun up?  (Do you hear it doing so?)

     That is indeed a good question!  There are jumpers which will delay
spinup till the computer asks for the drive to spin up.

     And... in the process, hold the drive.  Do you feel it buck a few
times in the process? That often indicates IC or motor problems, NOT head
problems, but sometimes even good drives have a little trouble starting
when temperatures are low. When the drive reaches operating speed, you
will hear a little click, and only then will the heads be free to move
about.  Till then, the heads are locked in place.  Heads are also very
light, and difficult to feel; the bucking is startup torque, not the
heads.

     If the drive does not reach operating speed, it will often shut down
and try again.

     Many drives will flash LED's with a diagnostic code.  The LED's are
often mounted on the PC board, and may not be visible unless you look, and
they are indicating.  Some of this may be available on the manufacturer's
web site.

     (I've... had my share of problems with drives.)	

- javilk at mall-net.com -----------------------------
-------- MS asks "Where do you want to go?" -------
------- Linux asks "What do you want to do?" ------
-- It is doers, not goers, who built this world! --
--------- Member: http://www.svlug.org/ -----------


--
echo "unsubscribe svlug" | mail majordomo at svlug.org
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ to unsubscribe
see http://www.svlug.org/mdstuff/lists.shtml for posting guidelines.