Large Filesystem Problem
From: Mags (m.f.z.abdel-messeh_at_open.ac.uk)
Date: 05/10/05
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Date: Tue, 10 May 2005 12:13:50 +0100
Dear All,
I am trying to build a new filesystem on a 500 GB SAN space.
If I run newfs with no parameters I get:
With 16129 sectors per cylinder, minimum cylinders per group is 16
This requires the fragment size to be changed from 1024 to 4096
Please re-run mkfs with corrected parameters
I then tried it with changing frag size, newfs -f 4096 /dev/dsk/disk and I
got:
Cylinder groups must have a multiple of 16 cylinders with the given
parameters
Rounded cgsize up to 256
Warning: insufficient space in super block for rotational layout tables with
nsect 127, ntrack 127, and nrpos 8.
Omitting tables - file system performance may be impaired.
Warning: inode blocks/cyl group (1011) >= data blocks (1008) in last
cylinder group.
This implies 16128 sector(s) cannot be allocated.
I also managed to put the same disk under Volume Manager and it used the
following parameters:
mkfs -F ufs -o
sect=32,ntrack=16,bsize=8192,fragsize=1024,cgsize=16,free=10,rps=60,nbpi=209
9,opt=t,apc=0,gap=0,nrpos=8,maxcontig=32
So I have two solutions, the volume manager one with fragsize=1024 and the
newfs with fragsize=4096 but with that warning ...
Which is a better solution, or is there even a better solution.
Many thanks,
Maged
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