Mount root from SD card?

[Krassimir Slavchev]

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This is the output:

CMD: 0 ARG 0 len 0
RES: 0
CMD: 8 ARG 1aa len 0
RES: 1
CMD: 37 ARG 0 len 0
RES: 0
CMD: 29 ARG 0 len 0
RES: 0
CMD: 0 ARG 0 len 0
RES: 0
CMD: 8 ARG 1aa len 0
RES: 1
CMD: 37 ARG 0 len 0
RES: 0
CMD: 29 ARG ff8000 len 0
RES: 0
CMD: 37 ARG 0 len 0
RES: 0
CMD: 29 ARG ff8000 len 0
RES: 0
CMD: 2 ARG 0 len 0
RES: 0
CMD: 3 ARG 0 len 0
RES: 0
CMD: 9 ARG 10000 len 0
RES: 0
CMD: 7 ARG 10000 len 0
RES: 0
CMD: 37 ARG 10000 len 0
RES: 0
CMD: 33 ARG 0 len 8
RES: 0
CMD: 6 ARG ffffff len 64
RES: 0
CMD: 37 ARG 10000 len 0
RES: 0
CMD: d ARG 0 len 64
RES: 2
CMD: 37 ARG 10000 len 0
RES: 0
CMD: d ARG 0 len 64
RES: 0
CMD: 7 ARG 0 len 0
RES: 0
CMD: 7 ARG 10000 len 0
RES: 0
CMD: 7 ARG 0 len 0
RES: 0
CMD: 7 ARG 10000 len 0
RES: 2
CMD: 6 ARG 80fffff0 len 64
RES: 0
CMD: 7 ARG 0 len 0
RES: 0
mmcsd0: 1983MB <SD Memory Card> at mmc0 30MHz/1bit
CMD: 7 ARG 10000 len 0
RES: 2
CMD: 37 ARG 10000 len 0
RES: 0
CMD: 6 ARG 0 len 0
RES: 0
CMD: 11 ARG 0 len 512
RES: 0
CMD: 11 ARG 0 len 512
RES: 0
CMD: 11 ARG 200 len 512
RES: 0
Trying to mount root from ufs:/dev/mmcsd0s1

>>
>> Also sysinstall crashes when trying to create a new slice.
>> May be because:
>> Disk name:      mmcsd0                                    FDISK
>> Partition Editor
>> DISK Geometry:  0 cyls/0 heads/0 sectors = 0 sectors (0MB)
> 
> I don't think it is related. There is no such thing as disk geometry on
> flash card, that's why driver does not announce it. The only places
> where it may be important is when fdisk is trying to align partitions
> with track boundaries for compatibility with legacy BIOS'es.
> 
> There is no problem to report some fake values, but from one side they
> should better match BIOS assumptions on geometry and from other, they
> should as much as possible to match flash erase sector size. I just have
> no any system which supports SD booting to report something reasonable
> there. Reporting maximal 63 sectors per track as for HDD may result in
> ineffective filesystem alignment and reduced performance.
> 
> 

At least sysinstall should be fixed. Should I fill a PR for this?

Best Regards

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