Hello,

I am a fedora user and I am having the same issue.
At some point, I think fedora 4 or 5, hda became sda
and I have had this issue since and still persist on fedora 8 with latest 
kernel.

I have gone to scsi drives on my servers

[EMAIL PROTECTED] ~]# hdparm  -tT /dev/sda

/dev/sda:
 Timing cached reads:   318 MB in  2.01 seconds = 158.33 MB/sec
 Timing buffered disk reads:   38 MB in  3.17 seconds =  11.98 MB/sec

Linux dbox 2.6.23.8-63.fc8 #1 SMP Wed Nov 21 18:51:08 EST 2007 i686
athlon i386 GNU/Linux

[EMAIL PROTECTED] ~]# hdparm   /dev/sda

/dev/sda:
 IO_support    =  0 (default 16-bit)
 readonly      =  0 (off)
 readahead     = 256 (on)
 geometry      = 4998/255/63, sectors = 80293248, start = 0
[EMAIL PROTECTED] ~]# hdparm  -a1 /dev/sda


[EMAIL PROTECTED] ~]# hdparm  -i /dev/sda

/dev/sda:

 Model=Maxtor 2F040J0                          , FwRev=VAM51JJ0, 
SerialNo=F184DD7E
 Config={ Fixed }
 RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57
 BuffType=DualPortCache, BuffSize=2048kB, MaxMultSect=16, MultSect=?16?
 CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=80293248
 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes:  pio0 pio1 pio2 pio3 pio4
 DMA modes:  mdma0 mdma1 mdma2
 UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5 udma6
 AdvancedPM=yes: disabled (255) WriteCache=enabled
 Drive conforms to: ATA/ATAPI-7 T13 1532D revision 0:  ATA/ATAPI-1,2,3,4,5,6,7

 * signifies the current active mode

-- 
poor performance hard disk IDE
https://bugs.launchpad.net/bugs/96693
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