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Date: Wed, 03 Sep 2003 20:12:46 +0300
From: Petri Helenius <pete@he.iki.fi>
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To: Max Clark <max.clark@media.net>
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cc: freebsd-performance@freebsd.org
cc: Dan Nelson <dnelson@allantgroup.com>
Subject: Re: 20TB Storage System
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Max Clark wrote:

>- What exactly is the fsck problem? What do I do about it?
>
>  
>
fsck requires approximately 700k memory for each gigabyte of disk space.
I´m unfortunately not familiar enough with the issue how this splits out 
for
blocks and inodes (for example if having only a million inodes on a 10TB fs
would make it tolerable) but taking the figure presented earlier, you would
need 7GB of memory for checking a 10TB filesystem. Having that kind
of memory for a single process neccessiates a 64bit system, like sparc64,
alpha, itanic or opteron.

Pete