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SubjectVIA Apollo IDE UDMA1?
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Date
Hija,

further investigation on my last mail discovered that another thing is
fishy; my first IDE drive works only un UDMA1 mode which is choosen by
the driver. Apart from never having seen that 22MB/s mode before both
the chipset and the drive are capable of more, the two drives on the
second channel also run in UDMA2.

The drive is a:
ATA device, with non-removable media
Model Number: WDC WD400EB-00CPF0
Serial Number: WD-WCAAT63853**
Firmware Revision: 06.04G06
Standards:
Supported: 5 4 3 2
Likely used: 6
Configuration:
Logical max current
cylinders 16383 4047
heads 16 16
sectors/track 63 255
--
CHS current addressable sectors: 16511760
LBA user addressable sectors: 78165360
device size with M = 1024*1024: 38166 MBytes
device size with M = 1000*1000: 40020 MBytes (40 GB)
Capabilities:
LBA, IORDY(can be disabled)
bytes avail on r/w long: 40 Queue depth: 1
Standby timer values: spec'd by Standard, with device specific minimum
R/W multiple sector transfer: Max = 16 Current = 16
Recommended acoustic management value: 128, current value: 254
DMA: mdma0 mdma1 mdma2 udma0 *udma1 udma2 udma3 udma4 udma5
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns

and everything from the last report is the same here.
/proc/ide/via says:
----------VIA BusMastering IDE Configuration----------------
Driver Version: 3.29
South Bridge: VIA vt82c586b
Revision: ISA 0x47 IDE 0x6
Highest DMA rate: UDMA33
BM-DMA base: 0xe000
PCI clock: 33MHz
Master Read Cycle IRDY: 1ws
Master Write Cycle IRDY: 1ws
BM IDE Status Register Read Retry: yes
Max DRDY Pulse Width: No limit
-----------------------Primary IDE-------Secondary IDE------
Read DMA FIFO flush: yes yes
End Sector FIFO flush: no no
Prefetch Buffer: yes yes
Post Write Buffer: yes no
Enabled: yes yes
Simplex only: no no
Cable Type: 40w 40w
-------------------drive0----drive1----drive2----drive3-----
Transfer Mode: UDMA DMA UDMA UDMA
Address Setup: 30ns 120ns 30ns 30ns
Cmd Active: 90ns 90ns 90ns 90ns
Cmd Recovery: 30ns 30ns 30ns 30ns
Data Active: 90ns 330ns 90ns 90ns
Data Recovery: 30ns 270ns 30ns 30ns
Cycle Time: 90ns 600ns 60ns 60ns
Transfer Rate: 22.0MB/s 3.3MB/s 33.0MB/s 33.0MB/s


--
Servus,
Daniel
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