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To: FreeBSD-users-jp@jp.FreeBSD.org
From: Yasuhiro Miyazaki <roseblue@cup.com>
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Date: Thu, 20 Mar 2008 11:23:20 +0900
X-Sequence: FreeBSD-users-jp 91490
Subject: [FreeBSD-users-jp 91490] Re: HP SmartArray P400 RAID5 very slow.
Sender: owner-FreeBSD-users-jp@jp.FreeBSD.org
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$B$_$d$6$-$H?=$7$^$9!#(B

> $BEvJ}$G$O(B DL380 G5 + SmartArray P400 $B$G>/!9:$$C$?$3$H$K$J$C$F$$$^$9!#(B
> 
>   - FreeBSD/amd64 7.0-RELEASE $B$r%$%s%9%H!<%k$7$F$$$k(B
>   - HDD $B$O(B SAS 146GB $B$r(B 8 $BK\AuCe$7$F$$$k(B
>   - DISK 1 $B$H(B DISK 2 $B$G(B RAID 1 $B$NO@M}%\%j%e!<%`$r(B
>   - DISK 3 $B!A(B DISK 8 $B$G(B RAID 5 $B$NO@M}%\%j%e!<%`$r:n$C$F$$$k(B

$B4D6-$,<c430[$J$j$^$9$,!"(B

    + FreeBSD 7.0-RELEASE i386

    + DL360 G5 + Smart Array P400 (512 MB BBWC, Firmware 4.12)
      + X5160 3.00 GHz x 2, 2 GB RAM

    + SAS 72.8 GB x 6
      + Host A : RAID6 (HDD x 6)
      + Host B : RAID5 (HDD x 5) + HotSpare 1

$B0J>e$N9=@.$,3NJ]$G$-$?$N$G!"(B2GB $B$N=q$-9~$_$G;n$7$^$7$?!#(B

> $B$H$$$&4D6-2<$G!"(B
> 
>   - dd if=/dev/zero of=zero.bin $B$r<B9T$7$J$,$i(B
>   - iostat 1 $B$N=PNO$rD/$a$k(B
> 
> $B$H$$$&$3$H$r$d$C$?$H$-$K!"(B
> 
>   - $B=PNO@h$,(B RAID 1 $B%\%j%e!<%`$N>l9g$O$*$*$h$=(B 75MB/sec
>   - $B=PNO@h$,(B RAID 5 $B%\%j%e!<%`$N>l9g$O$*$*$h$=(B 7MB/sec

    * Host A

      dd if=/dev/zero of=data.dd bs=1M count=2048
      2147483648 bytes transferred in 12.608231 secs (170323944 bytes/sec)

    * Host B

      dd if=/dev/zero of=data.dd bs=1M count=2048
      2147483648 bytes transferred in 8.509906 secs (252351041 bytes/sec)

$B$$$:$l$b(B 8GB $BDx$N%Q!<%F%#%7%g%s$K=q$-9~$s$@>l9g$G$9!#(B250 GB $BDx$N%Q!<(B
$B%F%#%7%g%s$G$bF1MM$K;n$7$^$7$?$,Bg$-$/$OJQ$o$j$^$;$s$G$7$?!#(B

HDD $B$N$_(B SAS 72.8 GB x 2 $B$G(B RAID1 $B$HJQ$($?>l9g!"(B111 MB/sec $BDx$G$7$?!#(B

