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From: Horst =?ISO-8859-1?Q?G=FCnther?= Burkhardt III <horst@sxemacs.org>
To: Alexander Best <alexbestms@math.uni-muenster.de>
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Date: Sat, 14 Mar 2009 20:36:46 +1100
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Cc: freebsd-current@freebsd.org, FreeBSD PowerPC ML <freebsd-ppc@freebsd.org>
Subject: Re: interrupt storm with dvd-drive
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On Fri, 2009-03-13 at 21:13 +0100, Alexander Best wrote:
> hi there,
>=20
> i was trying to create an iso from a cd. i tried both dd and recoverdisk.
> unfortunately during the very last read i get the following warnings:
>=20
{...}
> acd0: FAILURE - READ_BIG timed out
>=20
> during the interrupt storm the whole system freezes. what's strange about=
 this
> is that this only happens with recorded cds. when i use dd or recoverdisk=
 with
> a retail cd i'm having no problems at all. i tested this with cds that go=
t
> recorded under freebsd (using burncd) as well as with cds recorded under
> windows. the results is the same (being the interrupt storm). the problem
> however does NOT exist with DVD or DVD-/+R's! only with CD-Rs!
>=20
> this is the controller i'm using:
>=20
> <JMicron JMB363 SATA300 controller> port
> 0xd000-0xd007,0xd100-0xd103,0xd200-0xd207,0xd300-0xd303,0xd400-0xd40f mem
> 0xf8000000-0xf8001fff irq 19 at device 0.0 on pci3
>=20
> the drive is pata:
>=20
> DVDR <HL-DVDR <HL-DT-ST DVDRAM GSA-H10N/JL12> at ata4-slave UDMA33

This might be related to an issue I'm trying to eliminate atm, I'm
trying it now.

Basically I get the same minus the interrupt storm messages trying to
boot a freebsd cd on my mac. I'll take a look.

--
Horst.

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