Re: Another drive question

Nancy Jentzsch (jentzsch@csn.net)
Sat, 13 Jan 1996 14:52:47 EST

Timothy Ladd <ctladd@eastnet.educ.ecu.edu> responded:
>If it's a scsi drive then the problem might be in addresses for the drives.
>The SCSI bus can have 8 devices on it...usally one being the controller so
>most people just say seven devices. Each device must have an address from 0
>to 7 and 0 is usally the controller device but not always. Check the
>documentation and ensure the addressing is correct. Also, SCSI devices in a
>chain must be terminated at the end. The last device on the chain must be
>terminated. This is sometimes a switch or little jumper or resistor pack on
>a drive. Make sure only the last one is terminated.
>ctladd@eastnet.educ.ecu.edu

>Tim Dickson <mid@aisb.hu> originally wrote:
>>One of our teachers had a hard drive problem that tlooked like a crash. But,
>>after installing a new drive, that his PBook 145 didn't see, and attaching
>>an external drive that wasn't seen either, we are stumped. We haven't seen
>>a SCSi failure before. Does anybody know what's happening? tim

Careful!! Your advice evidently applies to DOS machines. The same is not
true for the Macintosh and PowerBook world. On that platform, SCSI numbers
must be in the range 1 to 6; the SCSI address of 0 is always retained for
the internal hard drive. Usually 3 is used for a CD-ROM device.

Also, depending on the device, termination is not essential.

Nancy Jentzsch
jentzsch@lynx.csn.net
District Technology Resource Teacher
Pueblo School District No. 60