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Date:      Mon, 12 Feb 2007 23:13:08 -1000
From:      Randy Bush <randy@psg.com>
To:        Oliver Fromme <olli@lurza.secnetix.de>
Cc:        freebsd-fs@FreeBSD.ORG, aronesimi@yahoo.com
Subject:   Re: comments on newfs raw disk ?  Safe ? (7 terabyte array)
Message-ID:  <17873.33060.746546.773210@roam.psg.com>
References:  <506226.11053.qm@web58610.mail.re3.yahoo.com> <200702121552.l1CFqi6q046650@lurza.secnetix.de>

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this has been a wonderfully well-timed thread as i am about
to hack a 4tb array tomorrow afternoon.  the normal spindle
is separate and partitioned to death and newfsed using the
defaults.  with 2gb of ram, i figure 6gb swap just in case
two userland hogs are running at once, e.g. some hog while
background fsck is running.

the 4tb will be used as a dump/restore target only.  so i
am thinking few files, relatively big ones, little i/o and
more write than read.

so my current plan is

newfs  -b 16384 -f 2048 -i 262144

i would crank up even further, but these are the largest
numbers mentioned in tuning(7).

i will leave -m alone for now.

does this seem reasonable?

thank you all for this thread.

randy




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