From mboxrd@z Thu Jan  1 00:00:00 1970
From: erik quanstrom <quanstro@quanstro.net>
Date: Sun, 19 May 2013 10:13:28 -0400
To: 9fans@9fans.net
Message-ID: <13095494dd62b57b68b36d52632bcfb6@kw.quanstro.net>
In-Reply-To: <5F4ED75F-A4FB-4B81-9595-24D2A06A4E24@ar.aichi-u.ac.jp>
References: <5F4ED75F-A4FB-4B81-9595-24D2A06A4E24@ar.aichi-u.ac.jp>
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Subject: Re: [9fans] atagenioretry: nondma
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On Sun May 19 00:34:14 EDT 2013, arisawa@ar.aichi-u.ac.jp wrote:
> Hello,
>
> yesterday day I had error messages below:
>
> automatic dump Fri May 17 05:00:07 2013
> automatic dump Sat May 18 05:00:08 2013
> command 30
> data f7aea8a0 limit f7aec0a0 dlen 16384 status 0 error 0
> lba 163565804 -> 163565804, count 32 -> 32 (32)
> atagenioretry: nondma w:163565804:32 @163565804:32
> wrenwrite: error on w"/dev/sdD0/fsworm"(2315949): i/o error 040804 163565804
> mirrwrite: error at w"/dev/sdD0/fsworm" block 2315949
> atagenioretry: nondma w:163565836:32 @163565836:32
> wrenwrite: error on w"/dev/sdD0/fsworm"(2315950): i/o error 040804 163565836
> mirrwrite: error at w"/dev/sdD0/fsworm" block 2315950
> atagenioretry: nondma w:163565900:32 @163565900:32
> wrenwrite: error on w"/dev/sdD0/fsworm"(2315952): i/o error 040804 163565900
> mirrwrite: error at w"/dev/sdD0/fsworm" block 2315952
> atagenioretry: nondma w:163565932:32 @163565932:32

iirc, there are three big issues i've seen with the ide driver.
1.  incorrrect pio timings,
2.  missed interrupts
3.  assumption that dma doesn't work.

the 9atom driver addresses all three of these issues.
but you may find it easier to chip away at the issue.
correcting the timings and adding the vid/did.  or
use the ahci driver, which tends to be more reliable
on newer hardware.  here's the ide source for comparison:

	/n/atom/plan9/sys/src/9/pc/sdide.c

what does your fs configuration string look like?

- erik