UPDATE: ATA mkIII first official patches - please test!

[Takahashi Yoshihiro]

In article <420F907B.1090901 at DeepCore.dk>
Søren Schmidt <sos at DeepCore.dk> writes:

> >>>2. A geometry translation for pc98 is NOT enough.
> >>>
> >>>   Currently, it works only under 4.3GB disk.
> 
> Wrong, ATA mk3 does solve the problem but using the "current" geomtry 
> set in the drives by the BIOS. However the code missed it in one place 
> in ata-lowlevel.c when the code was moved there from ata-disk.c.
> This has been fixed and will be present in the next snapshot as I sadi 
> earlier.


ATA-mkIII does NOT completely solve the problem.

The word 54-58 of the IDENTIFY DEVICE parameter are valid only up to
ATA/ATAPI-5.  They are obsolete parameters in ATA/ATAPI-6 and later.
So using them for a geometry translation has NO effect for recent
disks.

The following is the result when use SATA 200GB disk on pc98.  It is
clearly that recognizing a geometry fails.


atapci0: <SiI 3114 SATA150 controller> port 0xc000-0xc00f,0x602c-0x602f,0x6030-0x6037,0x6028-0x602b,0x6020-0x6027 mem 0x20411000-0x204113ff irq 10 at device 17.0 on pci0
ad4: <ST3200822AS/3.01> ATA-6 disk at ata2-master
ad4: 190782MB (390721968 sectors), 387621 C, 16 H, 63 S, 512 B
ad4: 16 secs/int, 1 depth queue, SATA150

BIOS Geometries:
 1:1778ffff 0..6008=6009 cylinders, 0..255=256 heads, 1..255=255 sectors


---
TAKAHASHI Yoshihiro <nyan at jp.FreeBSD.org>