how to read /proc/diskstats

Proc table disk stats

```
wget http://aspersa.googlecode.com/svn/trunk/rel
wget http://aspersa.googlecode.com/svn/trunk/align
chmod +x rel align
while sleep 1; do grep sdb1 /proc/diskstats; done > stats
```

# CTRL-C after a while
```
echo m m dev  reads   rd_mrg rd_sectors ms_reading \
  writes   wr_mrg     wr_sectors  ms_writing  cur_ios \
  ms_doing_io ms_weighted | cat - stats | ./rel | ./align
```