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LC II not being able to see two hard drives at the same time

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I got an LCII with a hard drive inside. 


As I wanted a second hard drive I decided to make an adaptor to connect my other SCSI drive to it's rear SCSI port. 


If I start with the external HD connected it boots from the external Hd and the internal is not visible.


If I start with the internal HD and later connect the external HD the external does not mount.


Anything I should do such as setting the external as slave? Or come pinout on my adapter that I am missing?


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12 hours ago, Cory5412 said:

To add: It's a bad idea to connect and disconnect SCSI devices while your system is running.

Seconding this. SCSI is not considered hot-pluggagable. You run the risk of cooking the SCSI controller and/or any device on the scsi bus by plugging and unplugging devices while the computer is powered on.


And I agree, sounds like both drives have the same ID. Change the external ID to something else.

Edited by just.in.time
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