Indigo/SGI drives

[Saquinn624 at aol.com]

On all of my replaced SCSI drives, I use SCA adaptors and SCA drives- much 
easier to get nowadays than 50 pin models, and also newer. Any drive will 
work-they do not need special firmware 

The deal for SGI sleds is as follows-

The 50 pin cable goes into the 50 pin narrow SCSI socket on the adaptor- self 
explanitory
The power cable will often need to be teased out a little longer (at least on 
Indigo2, I don't have my Indigo sled at hand)

For the SCSI ID cable (the 6-pin bit) you will need a VOM/DMM. One side will 
have a bank of 3 wires, the other will have 1 wire. On the adaptor, there will 
be 3 pins wired together -> these are ground, connect to the single pin side. 
The other wires set the SCSI ID based on which slot in the Indigo the drive 
is installed

If you choose to hardwire the drive (not as neat, but a definite 
possibility), remember that on IRISes the host adapter is ID 0, so the first (system) disk 
is ID 1- and so on. Most computers have the host adapter as ID #7, but not 
Siggys.

Best of luck to you, they are very neat machines, with a slick UI (Indigo 
Magic)- For IRIX 5.3 be sure to get the free IDO (Development Option-compilers 
and headers, available from www.sgi.com)

Scott Quinn