S?ren Schmidt wrote:
Roman Kurakin wrote:
This is not an LBA request. ATA driver thinks that I have 80G CHS device, cause it's ATA_FLAG_54_58
is zero. (This decision is incorrect, we shouldn't relay on this flag). I've checked another seagate 80G drive in
CHS mode(by driver hacking), and problematic one with LBA mode. I get the same behavior on both with CHS.
And both work fine in LBA mode. It also should be mentioned that I get this problem on machine with
ICH2 controller, and it seems that I don't have such problem on other machine with ICH5
Hmm, we could loosen up this check (Se patch below) but that will probably break support for real old ATA disks (note that those old
Probably I'll do something like that, but since I've already lost some time on this problem
I want to get why CHS mode doesn't works. I can't understand how using of ICH2 could lead
to such problems ... (I'll try to get access to other ICH2 and non ICH2 machines to make
extra checks).
As I understand before using CHS we issue command 91h, to set proper CHS mode.
I have one really CHS device and it seems to be working.
systems most likely will have trouble with -current anyways).
If I coul dhave my ways, we wouldn't even try to support disks that doesn't support LBA....
I think we could use another way to check old ata. Why no to use bit9 from word 49 and if
device really ATA, why it's 60-61 words are non zero?
PS. If you have any ideas, or if you have any materials (standards for example) about ATA/ATAPI and you
can share them with me, please let me know. I am not ata developer, so this is a bit difficalt for me to
dig this problem.
Go to t13.org they are the standards body for ATA etc...
I already have a couple of drafts, but probably I need to get some more information.
Please take a look to my patch. It makes output more informative. If I have it before I started to dig,
I didn't lost so much time. There is a couple of places where we may need to apply the alike patches.
rik
--- ata-queue.c.orig Tue Mar 23 20:39:22 2004
+++ ata-queue.c Thu Mar 25 00:45:51 2004
@@ -316,7 +316,9 @@
(request->dmastat & ATA_BMSTAT_ERROR))
printf(" dma=0x%02x", request->dmastat);
if (!(request->flags & (ATA_R_ATAPI | ATA_R_CONTROL)))
- printf(" LBA=%llu", (unsigned long long)request->u.ata.lba);
+ printf((request->device->flags & ATA_D_USE_CHS)
+ ? " CHS=%llx" : " LBA=%llu",
+ (unsigned long long)request->u.ata.lba);
printf("\n");
}
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