From: Stephan van Hienen <raid@a2000.nu>
To: linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: bernard@biesterbos.nl
Subject: tuning disk on 3ware /performance problem
Date: Sun, 6 Apr 2003 16:20:33 +0200 (CEST) [thread overview]
Message-ID: <Pine.LNX.4.53.0304061251190.8636@ddx.a2000.nu> (raw)
same disk (WD1800BB) on different controllers
----------
on intel u100/promise U100 :
/dev/hde:
Timing buffer-cache reads: 128 MB in 0.28 seconds =457.14 MB/sec
Timing buffered disk reads: 64 MB in 1.37 seconds = 46.72 MB/sec
Version 1.02c ------Sequential Output------ --Sequential Input-
--Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
--Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP
/sec %CP
storage.a2000.nu 1G 22364 96 42206 13 15897 6 22634 91 44019 10
252.1 0
------Sequential Create------ --------Random
Create--------
-Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
/sec %CP
16 3658 99 +++++ +++ +++++ +++ 3757 99 +++++ +++
9681 100
storage.a2000.nu,1G,22364,96,42206,13,15897,6,22634,91,44019,10,252.1,0,16,3658,99,+++++,+++,+++++,+++,3757,99,+++++,+++,9681,100
----------
# hdparm -v /dev/hde
/dev/hde:
multcount = 16 (on)
IO_support = 3 (32-bit w/sync)
unmaskirq = 0 (off)
using_dma = 1 (on)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 21889/255/63, sectors = 351651888, start = 0
----------
on 3ware (7850) :
/dev/sdb:
Timing buffer-cache reads: 128 MB in 0.28 seconds =457.14 MB/sec
Timing buffered disk reads: 64 MB in 1.70 seconds = 37.65 MB/sec
Version 1.02c ------Sequential Output------ --Sequential Input-
--Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
--Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP
/sec %CP
storage.a2000.nu 1G 22151 94 67312 18 20152 8 22315 90 38488 9
260.4 0
------Sequential Create------ --------Random
Create--------
-Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
/sec %CP
16 3706 99 +++++ +++ +++++ +++ 3895 99 +++++ +++
9686 99
storage.a2000.nu,1G,22151,94,67312,18,20152,8,22315,90,38488,9,260.4,0,16,3706,99,+++++,+++,+++++,+++,3895,99,+++++,+++,9686,99
----------
]# hdparm -v /dev/sdb
/dev/sdb:
readonly = 0 (off)
geometry = 21889/255/63, sectors = 351651888, start = 0
Is there anything i can do to tune the drives connected to he 3ware
controller ? (37MB/sec vs 43MB/sec)
(and why is the seq. output block 65MB/sec on the 3ware vs 41MB/sec on
'ide controllers')
next reply other threads:[~2003-04-06 14:08 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-06 14:20 Stephan van Hienen [this message]
2003-04-06 15:29 Chuck Ebbert
2003-04-06 15:56 ` Stephan van Hienen
2003-04-06 18:55 ` dean gaudet
2003-04-06 18:58 ` dean gaudet
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