Subject: slow disk access with large cpg values
To: None <netbsd-users@netbsd.org>
From: Lubos Vrbka <shnek@tiscali.cz>
List: netbsd-users
Date: 04/21/2004 17:40:12
hi guys,

my question is connected to my previous post. after i installed a new 
harddrive (identical to one that is already present in my i386 machine) 
i observed that whereas the older one uses cpg=86 the new one has 
cpg=28456 - this should be ok according to what frederick b. wrote me.
both disks are 20gb seagates, same models, connected to one ide 
controller with 80pin cable.

what i can observe now is that copying/moving files from disk with large 
cpg (LARGE) to disk with small cpg (SMALL) is much slower than copying 
in the other direction. as example - i have ~150mb file.
moving file LARGE -> SMALL takes 60.52 sec (measured with time)
moving file SMALL -> LARGE takes  8.95 sec (measured with time)

can this be connected with the different cpg values? or where could the 
problem be? when i try to move it in midnightcommander, i can see that 
it goes fluently for S->L, but exhibits several "lockups" with the other 
direction and waiting long time at the end of the operation when 
indicator says that 100% of the operation is finished...

system is rather old -current (1.6ZK)

thanks for help,

-- 
Lubos
_@_"