Bug#688297: Packard Bell (more DMA and disc write speed info)
On Fri, Sep 21, 2012 at 11:30:18AM +0100, Bertil wrote:
> Just to maker sure that this bug is not related to any common issues with old CD-ROM drives.
> K3b was the burning application (for maximum speed) in my previous install trials.
>
>
> 1. Lower Disc write speed:
> ===================
>
> I burned two more discs with the i) previous used Samsung Writemaster and ii) the Packard Bell NEC built-in CD/RW. Now I used 'wodim' with a comand line like so:
> wodim -dao -speed=4 -eject dev=/dev/sr0 i386/iso-cd/debian-wheezy-DI-b2-i386-netinst.iso
> With i) the wodim reported the write speed to be 2838 KB/s and with the internal Packard Bell NEC CD/RW ii) 706 KB/s.
> No wheezy beta-2 boot with these two discs either. Same 'Boot Record' ... 'Not Found' message.
>
>
> 2. DMA settings
> ============
> During boot (with the installed wheezy beta-1) the boot up screen say:
> Hard Disk(s) Cyl Head Sector Size LBA 32Bit Block PIO UDMA
>
> Primary Master: 13410 15 63 6489MB LBA Off 16Sec 4 2
> Secondary Slave CDROM 4 N/A
>
> Thus I assume that DMA does not to come into play as an issue for the CD-ROM.
I would not imagine DMA matters much for reading a CD.
Does the disc boot on other machines?
As in:
Boots|Packard Bell|Something else
-----+------------+--------------
Beta1|Yes |Yes
Beta2|No |???
Maybe Beta2 did some change that hit a bug in the CD boot code on the
old machine.
--
Len Sorensen
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