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Hi,<br>
<br>
Last weekend I've add a new hard drive and done a fresh
installation fedora 12 on
it.<br>
<br>
Now, sometimes when I'm using mainly firefox, thunderbird or yum in
gnome-panel it shows almost 50% iowait
(and sometimes 100%, depending if are using one or two cores) after do
some action, for example, moving some messages between folders or view
a new web page in firefox or installing some software with yum...<br>
<br>
12:20:30 PM CPU %user %nice %system %iowait
%steal %idle<br>
12:20:35 PM all 7.94 0.00 4.46 40.28
0.00 47.32<br>
12:20:40 PM all 18.63 0.00 17.83 24.20
0.00 39.34<br>
12:20:45 PM all 10.31 0.00 7.73 44.80
0.00 37.17<br>
12:20:50 PM all 5.25 0.00 1.19 45.49
0.00 48.07<br>
12:20:55 PM all 4.45 0.00 1.09 41.70
0.00 52.77<br>
12:21:00 PM all 5.05 0.00 1.49 0.00
0.00 93.47<br>
12:21:05 PM all 4.86 0.00 1.09 0.00
0.00 94.05<br>
<br>
During some time (one or two minutes) the computer stays unusable.
During this time with iotop, every two seconds kdmflush and kjournald2
appear
with 99% in IO column, and nothing relevant about the application I'm
using.<br>
<br>
I've done some tests with dd to crate one large and hundreds small
files in the
disk and this doesn't happens.<br>
<br>
At this point I don't know if the problem is on the disk or some
bug in fedora.<br>
<br>
Can you tell something how to debug this problem?<br>
<br>
Now I write some information about the disk.<br>
<br>
-- begin --<br>
[root@AbsolutCitronela ~]# smartctl -i /dev/sdb<br>
smartctl version 5.38 [x86_64-redhat-linux-gnu] Copyright (C) 2002-8
Bruce Allen<br>
Home page is <a class="moz-txt-link-freetext" href="http://smartmontools.sourceforge.net/">http://smartmontools.sourceforge.net/</a><br>
<br>
=== START OF INFORMATION SECTION ===<br>
Device Model: WDC WD10EADS-00P8B0<br>
Serial Number: WD-WCAVU0108589<br>
Firmware Version: 01.00A01<br>
User Capacity: 1,000,204,886,016 bytes<br>
Device is: Not in smartctl database [for details use: -P showall]<br>
ATA Version is: 8<br>
ATA Standard is: Exact ATA specification draft version not indicated<br>
Local Time is: Thu Dec 10 12:27:21 2009 WET<br>
SMART support is: Available - device has SMART capability.<br>
SMART support is: Enabled<br>
<br>
[root@AbsolutCitronela ~]# hdparm -i /dev/sdb<br>
<br>
/dev/sdb:<br>
<br>
Model=WDC, FwRev=01.00A01, SerialNo=WD-WCAVU0108589<br>
Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs
FmtGapReq }<br>
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=50<br>
BuffType=unknown, BuffSize=unknown, MaxMultSect=16, MultSect=8<br>
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=1953525168<br>
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}<br>
PIO modes: pio0 pio3 pio4 <br>
DMA modes: mdma0 mdma1 mdma2 <br>
UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 *udma6 <br>
AdvancedPM=no WriteCache=enabled<br>
Drive conforms to: Unspecified: ATA/ATAPI-1,2,3,4,5,6,7<br>
<br>
* signifies the current active mode<br>
<br>
-- end --<br>
<br>
The SATA controller is an ICH6R.<br>
<br>
00:1f.2 SATA controller: Intel Corporation 82801FR/FRW (ICH6R/ICH6RW)
SATA Controller (rev 03)<br>
<br>
<br>
Thanks in advance.<br>
<br>
Regards,<br>
<br>
Filipe<br>
<br>
<br>
<br>
<br>
</tt>
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