[comp.sys.next] 5.25" HD internal questions - HELP!

andrewd@cs.tamu.edu (Andrew Ted Duchowski) (02/09/91)

Hi.
I have some questions regarding the installation of an internal
5.25" hard drive.  I don't have access to NeXTAnswers at the moment
so I'm posting here.

What I have:
- '040 cube
- 105Mb internal half-height drive (came with cube)
- Fujitsu 2263sa 5.25" 700Mb to-be-internal HD
- I think I've set the jumpers ok on the Fujitsu (btw: what was that
  post I saw here that you can set pins "1 and 2" to get the 
  drive to format to 700Mb instead of 660Mb?  What pins 1 and 2?
  There are several CNx and CHNx with pins/jumpers.  Can that
  person (you know who you are) be more specific?)
- I have the /etc/disktab entries (although I don't like them - see below) 
- I've moved my 105Mb drive to the highest mounting position 
  in the cube, just underneath the floppy.

What I think I need at the moment:
- Flat SCSI(1) cable
- mounting screws

What I want to do:
- have both HD's installed in the cube
- want the 105Mb to be the boot disk, not the Fujitsu
- I'd like to partition the disks up into more than one
  or two partitions

My questions:
- will the 5.25 fit?  I can't really tell just by looking.
  It looks like it will fit and coexist with the 105 (I hope).
  Do I need mounting brackets, or can I just screw the thing in?
- why is it that I see from the disktab entries and the
  manual writeup on BuilDisk that 660Mb can *only* be partitioned
  in two (a and b partitions), with the intention of having
  system on pa?
- the scsi cable: it appears that I'm supposed to daisy-chain
  the internal drives if I want them both.  Am I on the right
  track?  If I am, then I think I need to know whether
  the 105Mb is scsi-terminated.  I can't find that info.
  As far as daisy chaining is concerned, what does daisy
  chaining "look like"?  Is the device that's supposed to
  be in the middle (non-terminating) supposed to have two
  scsi-ports?  Or is it a matter of bying a cable with 
  some kind of "open head" so that you can attach the end
  of another cable on top of the "middle" one?  That's
  sort of what NeXT User's Refernce says, but it isn't 
  very clear, and the pictures show _two_ ports on the "middle"
  machine.  So I'm confused about this.
- swap space: I saw numerous posts about this but I don't quite
  understand the concept.  I guess you're supposed to 
  allocate say 20Mb on the hard disk for swap space.  How
  do you do this?  If my cube has swap space, I can't see it
  via "df".  df says my 105Mb has 90Mb on partition a (the only
  partition) and nothign about any swap space.
- /etc/disktab: why isn't there an entry for teh quantum drive
  that's sitting in my cube?  It is a qunatum, isn't it?
- as an aside, I set up some user accounts.  In the NeXT manuals
  it says that it uses NetInfo to store this info.  What
  is /etc/passwd and /etc/group for then?  Also, I changed
  the /me account to /home/me, changed some group memberships
  etc.  These changes *dont* show up in either /etc/ files.
  Where is this info stored?  Why aren't we supposed to
  "muck" with the /etc/ files even when the info conflicts?

Well, that's about it.  I'm sorry for asking so much.  I haven't
seen any of this on comp.sys.next before, and I haven't seen
the answers to the questions in the manuals that came with my
machine.  I also didn't get a chance to browse through
NeXTAnswers, unfortunately.

Anyway, the drive is of utmost importance right now.  I'll
deal with NeXT peculiarities later.

If anyone has dealt successfuly with the hard drive in the
manner that I'd like to set it up, please please send me
some answers a.s.a.p.  Please email to andrewd@cs.tamu.edu.

Thanks in advance,
Andrew.

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