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SubjectPromise 20267 "working" but no UDMA
Date
Anybody manage to get UDMA 66/100 working with an on-board Promise 20267
chip?

Hardware: Tyan Tiger LE (with ServerWorks OSB4 _and_ Promise 20267 on-board)

Kernel: 2.4.3 with ide.2.4.3-p8.all.03242001.patch by Andre Hedrick (or
stock 2.4.3 with more or less same results)

FastTrack config: only 1 drive, configured as a SPAN volume consisting of 1
drive

I don't quite care about the Promise RAID features. I will use Linux
software RAID. The problem is that I cannot seem to be able to get the
controller into UDMA 4 (66 Mhz) mode!

I have enabled all the relevant DMA related kernel options. I have also
checked using the Seagate disk utility to make sure that the drive is
recognized (and configured) as UDMA 66 capable.

The following is from dmesg:

PCI: Found IRQ 10 for device 00:03.0
PDC20267: chipset revision 2
PDC20267: not 100% native mode: will probe irqs later
PDC20267: ROM enabled at 0xfeae0000
PDC20267: (U)DMA Burst Bit ENABLED Primary MASTER Mode Secondary MASTER
Mode.
PDC20267: neither IDE port enabled (BIOS)

I wonder what the last line meant by saying neither port is enabled?

# /sbin/hdparm -Tt /dev/hde

/dev/hde:
Timing buffer-cache reads: 128 MB in 0.74 seconds =172.97 MB/sec
Timing buffered disk reads: 64 MB in 12.82 seconds = 4.99 MB/sec [should
be much much faster here]

# cat /proc/ide/pdc202xx

PDC20267 Chipset.
------------------------------- General
Status ---------------------------------
Burst Mode : enabled
Host Mode : Normal
Bus Clocking : 33 PCI Internal
IO pad select : 10 mA
Status Polling Period : 0
Interrupt Check Status Polling Delay : 0
--------------- Primary Channel ---------------- Secondary
Channel -------------
enabled enabled
66 Clocking enabled disabled
Mode MASTER Mode MASTER
FIFO Empty FIFO Empty
--------------- drive0 --------- drive1 -------- drive0 ----------
drive1 ------
DMA enabled: no no yes no
DMA Mode: UDMA 4 NOTSET NOTSET NOTSET
PIO Mode: PIO 4 NOTSET NOTSET NOTSET

# hdparm -d1 /dev/hde

/dev/hde:
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
using_dma = 0 (off)

# hdparm -X68 /dev/hde

[resulted in the following message in /var/log/messages]

Apr 1 19:03:21 promise kernel: ide2: Speed warnings UDMA 3/4/5 is not
functional.

# hdparm -i /dev/hde

/dev/hde:

Model=ST36421A, FwRev=6.01, SerialNo=5BE064AN
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
RawCHS=13330/15/63, TrkSize=0, SectSize=0, ECCbytes=4
BuffType=unknown, BuffSize=256kB, MaxMultSect=16, MultSect=off
CurCHS=13330/15/63, CurSects=913440960, LBA=yes, LBAsects=12596850
IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 *mdma2 udma0 udma1 udma2 udma3 *udma4

Many thanks for pointers!

Andrew Chan

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