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AlpineRaven

PowerBook 550c SCSI2SD internal with SCSI2SD external

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G'day all,

I have came to a problem, My PowerBook 550c (same logicboard as PowerBook 540c) has SCSI2SD for PowerBook in it and if I connect up my external SCSI2SD to it, you cannot get it started and it'll have grey screen with mouse pointer for several minutes then flashing floppy icon comes up. It works fine in my PowerBook 540c but it has a spinner Hard Drive in it.

 

Turn it off, remove SCSI devices, turn it on - it won't boot unless you put an floppy disk in to boot it up, then restart then the SCSI2SD internal Hard Drive will load up.

 

I have kept the SCSI ID separate and its not conflicting at all - I have checked like 5 times now hehe.

 

Why is it doing that? Have I configured something wrong?

Cheers

AP

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I had issues like this with my SE/30; it seems like there are some strange cases where the right thing is not intuitive.  In the case of my SE/30, if I apply power to the SCSI2SD external board, I get the situation you have.  Remove the power and it works fine.  Not sure what that is all about.  I believe that I did not have power applied to the internal one when that happened. 

 

I also use an external SCSI2SD with my PB 540c.  I found that for that one it does require power to the external SCSI2SD or it won't recognize it; If I recall, I get the same issue as you, in that it won't boot at all in without power to the external SCSI2SD.  I also have an internal SCSI2SD in it as well.  I can't help but wonder if the two of them together are using too much power for the SCSI bus to provide. 

 

Have you tried applying power to the external SCSI2SD unit? 

 

You might also try to fiddle with termination.  As @Crutch said, are you sure both internal and external units are terminated?  If they are, try taking the termination off of the external one.  I know it sounds wrong, but you never know.  For a long time SCSI2SD just worked for me, but lately I've been seeing all kinds of strange and un-intuitive stuff. 

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Sorry I didn't comment re; termination and power - 

Yes to both - It is terminated and I do have Power to it. (it has custom built PSU to power it for Macs that cannot supply power via SCSI2SD)

 

I am puzzled and its doing my head in wondering what isn't right? or you cannot use both 2x SCSI2SD on one mac?

 

Cheers

AP

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