🚀 go-pugleaf

I have a situation in which I want to use growfs to adjust disk usage.
(This is on a 4D/340 running 4.0.5a.)
I led myself on a great and merry chase, details of which
I'll post later for other reasons, but for now I have some
key questions.

The disk, /dev/dsk/dks0d3,  is currently partitioned as follows:

Partition  Type  Fs   Start: sec   (cyl)    Size: sec    (cyl)  Mount Directory
 0          raw             3816  (   3)       334536   ( 263)
 1          efs  yes      338352  ( 266)       508800   ( 400)   /usr/people
 5          efs  yes      847152  ( 666)       679248   ( 534)
 6          efs          1526400  (1200)       581304   ( 457)
 7          efs             3816  (   3)      2103888   (1654)
 8       volhdr                0  (   0)         3816   (   3)
10       volume                0  (   0)      2107704   (1657)

It used to have no partition 5, and partition 6 was everthing
from the end of partition 1 (cyl 666) to end of disk (cyl 1657),
but I split p6 up into p5 and p6 and did mkfs on p5.

Okay -- now I want to use growfs to expand p1 to include p5.
I gather from "man growfs" that I can do this without using logical 
volumes if I just change partition setup so that p1 expands to 
include p5, i.e.

 1          efs  yes      338352  ( 266)      1188048   ( 934)   /usr/people

and then do  growfs -s 1188048 /dev/dsk/dks0d3s1.

So the big questions are these:
Is this all okay?  Any reason such a thing should not be done?

(I experimented first by expanding p5 to include p6 and then growfs
on p5.  It seemed to work okay, so then I adjusted partitions again to
split p5 and p6 up again to the state shown above.  Before I go
ahead and try it for real on /usr/people, I thought I'd better ask.
Yes I'll do backups first.)

Sort of related question: if I decide to chicken out of all this,
how do I make partition 5 go away?  I see how to use fx to
restore p6 to its original parameters but I don't see how
to tell it to get rid of p5.

Thanks for your words of chastisement and/or reassurance.


-------------
Robyn Landers
rblanders@math.uwaterloo.ca
Math Faculty Computing Facility, University of Waterloo, Ontario, Canada