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SubjectRe: poor IDE performance on ASUS P4PE with WD800JB

I'm using some maxtor on the same motherboard and I had to struggle a
bit before getting some decent perf, basically I kept only the minimum
IDE,ATA.. drivers in my kernel, for my P4PE it's the Intel PIIXn and
also the PIIXn tuning option.
I also added idebus=66 in my command-line kernel option...
I disabled the Promise Raid controller in the bios that was responsible
for some 2.4.20 kernels to hang at detection (?)

now I get this :

# hdparm -tT /dev/hda

Timing buffer-cache reads: 128 MB in 0.30 seconds =426.67 MB/sec
Timing buffered disk reads: 64 MB in 1.38 seconds = 46.38 MB/sec

# hdparm -I /dev/hda


non-removable ATA device, with non-removable media
Model Number: Maxtor 6Y120P0
Serial Number: Y40FKPWE
Firmware Revision: YAR41VW0
Supported: 1 2 3 4 5 6 7
Likely used: 7
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
bytes/track: 0 (obsolete)
bytes/sector: 0 (obsolete)
current sector capacity: 16514064
LBA user addressable sectors = 240121728
LBA, IORDY(can be disabled)
Buffer size: 7936.0kB ECC bytes: 57 Queue depth: 1
Standby timer values: spec'd by standard, no device specific
r/w multiple sector transfer: Max = 16 Current = 16
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5 udma6
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
Enabled Supported:
* NOP cmd
* Host Protected Area feature set
* look-ahead
* write cache
* Power Management feature set
Security Mode feature set
SMART feature set
SET MAX security extension
Advanced Power Management feature set
Master password revision code = 65534
not enabled
not locked
not frozen
not expired: security count
not supported: enhanced erase
HW reset results:
CBLID- above Vih
Device num = 0 determined by the jumper
Checksum: correct

this disk seems equivalent to your western digital.

my lspci :

00:00.0 Host bridge: Intel Corp. 82845G/GL [Brookdale-G] Chipset Host Bridge (rev 02)
00:01.0 PCI bridge: Intel Corp. 82845G/GL [Brookdale-G] Chipset AGP Bridge (rev 02)
00:1e.0 PCI bridge: Intel Corp. 82801BA/CA/DB PCI Bridge (rev 82)
00:1f.0 ISA bridge: Intel Corp. 82801DB ISA Bridge (LPC) (rev 02)
00:1f.1 IDE interface: Intel Corp. 82801DB ICH4 IDE (rev 02)
00:1f.5 Multimedia audio controller: Intel Corp. 82801DB AC'97 Audio (rev 02)
01:00.0 VGA compatible controller: nVidia Corporation NV25 [GeForce4 Ti4200] (rev a3)
02:03.0 FireWire (IEEE 1394): VIA Technologies, Inc. IEEE 1394 Host Controller (rev 80)
02:0b.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)

a lot of device don't appear here because I disabled them whilst looking
for what is causing my maching to hang once every three days...

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