[TriLUG] LVD and SE SCSI question

[Jon Carnes]

It depends on the Controller card... I think the normal reaction is that 
the SCSI controller simply slows down the speed to match the slowest 
device.  In this case your LVD would automatically adjust its speed down.

I've done this on a couple of boxes with no ill effects.  Basically I've 
gotten in new drives that were LVD and stuck them into older boxes with 
older SCSI drives (but with SCSI controllers that could handle LVD).  It's 
all worked just fine.

If you are worried about it, simply move the LVD drives to their own 
channel off the card and leave the others on the current channel -- 
assuming that your SCSI controller has multiple channels.
 
What kind of oddness are you seeing?  Have you tried updating the BIOS on 
your Controller?

On Friday 02 August 2002 12:08 am, Tanner Lovelace wrote:
> Hi folks,
>
> This may be a stupid question, but does anyone know what might happen
> if, say, an LVD SCSI drive is put on the same cable with a few SE
> SCSI drives? :-[  I've been trying to figure out why the SCSI card
> in the machine the CPD donated has been flaking out and on a whim
> this evening I looked up the complete drive specs and notice that
> one of the drives is LVD scsi.  Now, the card supports LVD scsi,
> but I'm afraid I may have messed things up by putting them both
> together.  I'm hoping, however, that by either just separating them,
> or by finding a jumper for the jumper on the LVD drive labeled
> "Force Single Ended" will fix things.  However, since I'm not
> a SCSI expert, I'd like to hear a few more opinions.
>
> Thanks in advance,
> Tanner