Lengthy pg_restore and high iowait?

Hello again. I'm setting up a backup routine for my new db server. As
part of my testing, I'm attempting to pg_restore a pg_dump'ed backup of
my database. The database is about 4.3 GB, and the dump file is about
100 MB.

I first did a schema-only restore, then started a data-only restore
with --disable-triggers to get around the referential integrity issues
of reloading the data. The data-only restore has been running for a
couple of hours now, and I'm seeing high iowait numbers in top.

15:57:58 up 23:55, 2 users, load average: 2.04, 2.07, 2.01
60 processes: 57 sleeping, 3 running, 0 zombie, 0 stopped
CPU states: cpu user nice system irq softirq iowait idle
total 4.0% 0.0% 0.7% 0.0% 0.0% 43.5% 51.6%
cpu00 0.0% 0.0% 0.3% 0.0% 0.0% 84.8% 14.7%
cpu01 15.7% 0.0% 1.7% 0.0% 0.0% 2.7% 79.6%
cpu02 0.1% 0.0% 0.7% 0.0% 0.0% 84.2% 14.7%
cpu03 0.2% 0.0% 0.0% 0.0% 0.0% 2.4% 97.4%
Mem: 3869544k av, 3849280k used, 20264k free, 0k shrd,
110544k buff
1297452k actv, 2298928k in_d, 57732k in_c
Swap: 2040244k av, 0k used, 2040244k free
3576684k cached

PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME CPU
COMMAND
8366 postgres 16 0 954M 954M 952M R 4.3 25.2 21:58 1
postmaster
9282 postgres 15 0 0 0 0 RW 0.2 0.0 0:00 2
postmaster
1 root 15 0 496 496 444 S 0.0 0.0 0:05 3 init

Questions:
* Do these iowait numbers indicate a problem with my setup?
* Does anyone have a good method for disabling indexes before a restore
and restoring them afterwards? I've spent some time writing scripts to
do this, but I have yet to come up with drop/recreate solution that
returns my database to the same pre-drop state.

Thanks in advance!

Leon