Re: interrupt storm with dvd-drive

On Fri, 2009-03-13 at 21:13 +0100, Alexander Best wrote:
> hi there,
> 
> 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:
> 
{...}
> acd0: FAILURE - READ_BIG timed out
> 
> 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 got
> 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!
> 
> this is the controller i'm using:
> 
> <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
> 
> the drive is pata:
> 
> 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.