[rescue] 670MP outfitting....

[BSD Bob the old greybeard BSD freak]

Following along the 670MP crate thread, as to outfitting the beast for
optimum utility....

The crate came with a pair of SUN1.3GIG drives (the seagate things),
and a half height cdrom, and an open drive slot.

Now, for the sake of discussion, and using SunOS-4.1.3U1 on the critter,
cuz it was handy.....

1. I was thinking of adding one or two 150mb 18-track tape transports,
   half height, to it, plus my outboard Cipher 9-track reel deck.
   Are there any constraints I need to be aware of, ahead of time, in
   doing this on a 670MP or SunOS-4.1.3U1?

2. The internal scsi cable has 6 connectors (two full height at the back
   and 4 half or 2 full height at the front) on the drive sled assembly.
   If I want to load the thing up, reasonably, with 6 devices internally
   plus the old reel tape, externally, are there any constraints I need
   to be aware of, ahead of time, regarding cable runs or bus loading
   that could be problematic?  I have never had good luck on older VME
   SUNthings driving a heavily loaded scsi bus, but the 4/600 cpu seems
   to have more driving power, and the cabling is much better than on
   the old crates.

3. In SunOS-4.1.3U1, are there any drive or file system sizing issues
   that I need to be aware of?  I was thinking it had 2g fs max sizes,
   but I did not remember the max drive sizes associated with that OS
   revision.

4. Are there any insights as to reducing machine noise?  The fans remind
   me of the flight line noise in SAC during alerts....(:+\\.....  Can it
   be run on say half the number of fans and still maintain cooling?
   All it really needs to cool is the cpu (2 fans out of 3 on the one
   side) and the top drive bay (2 fans out of 3 or maybe even one fan
   out of 3).  If I use modern drives, e.g., less heat, I would expect
   the fan load could be reduced, but thought I would check to be sure.

Thanks

Bob