sirbruce@ix.netcom.com (Bruce Sterling Woodcock) writes: [...]
I'm not sure where your missing 92.25MB is. :)
It's (20.5 * 5 * 0.9) MB. :)
There's a 20.5 MB reserve, which is constant over all disc sizes I've seen (4GB, 9GB, 18GB; maybe someone can confirm it for 36GB). Presumably it's the fixed low-address area that was there even before right-sizing was invented.
So for jmiddlebrooks@datalink.com's system one calculates:
8600 MB (right-sized) - 20.5 MB = 8579.5 MB per disc inside the RAID4 regime;
x 5 data discs = 42897.5 MB;
x 0.9 maximum utilisation allowed = 38607.75 MB = 39534336 KB
which agrees exactly with the 31627472 + 7906864 KB shown by "df".
Chris Thompson University of Cambridge Computing Service, Email: cet1@ucs.cam.ac.uk New Museums Site, Cambridge CB2 3QG, Phone: +44 1223 334715 United Kingdom.