On 3 Mar 2006, at 13:24, Philip Trickett (List) wrote:
> Apparently, you might not want to set the reserved space to zero, as
> some of it is used for making sure that fragmentation does not become a
> problem. (Hey, I saw it linked off /. so it must be true...)
This "space reserved for the superuser" has been about for a long time
- I first saw it on SunOS nearly 20 years ago. After many years of
happily accepting the received wisdom, I decided that I really couldn't
care if the disk could allocate space as efficiently as it got full -
I'd sooner a little inefficient allocation rather than not being ab le
to use space which is there.
So, I took to creating filesystems with no space reserved for root, and
the policy has served me well since. When I started using Linux, I met
my old friend the reserved space, and I again ignored him, to no ill
Some time after I started doing this, I had the opportunity to discuss
the wisdom of this with Remy Card, one of the authors of the ext2 code.
He said that he did just as I did on some large busy FTP servers to to
no ill effect. So I figure if it's good enough for him . . .
That all said, wouldn't you think that somebody who is clearly rather
familiar with the principle of reserved space on a filesystem would
think to check that when wondering where some space was gone :-(
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