rychlost cteni a zapisu na disk

mardon mar.don na seznam.cz
Středa Červenec 2 14:19:23 CEST 2008

mardon napsal(a):
> Dell Poweredge 2400, s hw raidem.
> Potrebovala bych overit rychlost cteni a zapisu na disky v Raidu.
> Jak na to?
  takze jsem dostala takovy vysledek

login as: donicova
donicova na's password:
Linux dmz 2.6.18-5-686 #1 SMP Mon Dec 24 16:41:07 UTC 2007 i686

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
You have new mail.
Last login: Tue Jul  1 14:50:38 2008 from
donicova na dmz:~$ su -
dmz:~# last
donicova pts/0        Wed Jul  2 14:23   still logged in
donicova pts/0        Tue Jul  1 14:50 - 15:13  (00:22)
reboot   system boot  2.6.18-5-686     Tue Jul  1 14:46 - 14:23  (23:37)
donicova pts/0        Tue Jul  1 10:33 - down   (04:08)

wtmp begins Tue Jul  1 10:33:50 2008
dmz:~# mc

dmz:~# man hparm
No manual entry for hparm
dmz:~# man hdparm
No manual entry for hdparm
dmz:~# man clear
Reformatting clear(1), please wait...

        clear - clear the terminal screen


        clear clears your screen if this is possible.  It looks in the 
        ment for the terminal type and then in the terminfo database to 
        out how to clear the screen.

        tput(1), terminfo(5)

dmz:~# clear
dmz:~# cd /home
dmz:/home# cd /donicova
-su: cd: /donicova: No such file or directory
dmz:/home# ls
app  donicova  lost+found  radekk
dmz:/home# cd donicova
dmz:/home/donicova# ls
afaapps-2.6-0.tar.gz  soubor1  soubor2  soubor6
dmz:/home/donicova# mc

dd if=/dev/zero of=soubor bs=1M count=4096
4096+0 records in
4096+0 records out
4294967296 bytes (4.3 GB) copied, 551.122 seconds, 7.8 MB/s

dd if=soubor of=/dev/null bs=1M count=4096
4096+0 records in
4096+0 records out
4294967296 bytes (4.3 GB) copied, 104.364 seconds, 41.2 MB/s

Kde hledat pricinu pomaleho zapisu na disk?

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