[plug] hdparm -d1 /dev/hdc

[William Kenworthy]

Try setting the VIA chip interface in the ata/ide/mfm/rll support of the
kernel.

______________________________________
CONFIG_BLK_DEV_VIA82CXXX:

This allows you to configure your chipset for a better use while
running PIO/(U)DMA, it will allow you to enable efficiently the
second channel dma usage, as it may not be set by BIOS.  It will try
to set fifo configuration at its best.  It will allow you to get
information from /proc/ide/via provided you enabled "/proc file
system" support.

Please read the comments at the top of
drivers/ide/via82cxxx.c.

If you say Y here, then say Y to "Use DMA by default when available"
as well.

If unsure, say N.
______________________________________

 cat /proc/ide/via
----------VIA BusMastering IDE Configuration----------------
Driver Version:                     3.35
South Bridge:                       VIA vt82c686b
Revision:                           ISA 0x40 IDE 0x6
Highest DMA rate:                   UDMA100
BM-DMA base:                        0xc000
PCI clock:                          33.3MHz
Master Read  Cycle IRDY:            0ws
Master Write Cycle IRDY:            0ws
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:        PIO       PIO      UDMA       PIO
Address Setup:       30ns     120ns      30ns      90ns
Cmd Active:         300ns     300ns     330ns     330ns
Cmd Recovery:        60ns      60ns     270ns     270ns
Data Active:        120ns     330ns      90ns     300ns
Data Recovery:      120ns     270ns      30ns     300ns
Cycle Time:         240ns     600ns      60ns     600ns
Transfer Rate:    8.3MB/s   3.3MB/s  33.3MB/s   3.3MB/s