[Gta04-owner] QtMoko v49

Gerhard Rieger gerhard at rieger-priv.org
Thu Nov 22 15:51:08 CET 2012


On 2012-11-22 12:57, Neil Jerram wrote:
> On Thursday, November 22, 2012 09:35:06, Dr. H. Nikolaus Schaller wrote:
>> Am 22.11.2012 um 10:23 schrieb Griera:
>>
>>> Hi:
>>>
>>> On Thu, 22 Nov 2012 09:59:00 +0100
>>> "Dr. H. Nikolaus Schaller" <hns at goldelico.com> wrote:
>>>
>>>> Hi Radek,
>>>>
>>>> Am 22.11.2012 um 09:13 schrieb Radek Polak:
>>>>
>>>>> On Thursday, November 22, 2012 01:44:59 AM EdorFaus wrote:
>>>>>
>>>>>> The reason this is not possible, is because one of p1..p4 is used up by
>>>>>> the extended partition that contains the remaining partitions (as the
>>>>>> primary table only has room for 4, and we have to know where to find the
>>>>>> rest).
>>>>> Yup i have noticed it now too. So for next QtMoko release the recommended 
>>>>> partition scheme is:
>>>>>
>>>>> p1 - small fat - used for gta04-init and for upgrading the NAND bootloader
>>>>> p2 - ext4 with rootfs for QtMoko
>>>>> p3 - ext3 with rootfs for SHR
>>>>> p4 - extended partition
>>>>> p5 - FAT with media
>>>>> p6..p9 - optinal - can be used for more distros, that use gta04-init
>>>> Looks very complicated to me and makes it even more difficult to burn
>>>> a working SD card than before.
>>> Difficult, but only have to do once. And the advantage is that you can
>>> have multiple distributions on one card for testing.
>> Yes, but IMHO it can be simplified even more by not requiring a specific
>> scheme by QtMoko.
>>
>> The latest bootloader supports to have up to 4 different distributions on
>> one SD.
>>
>> Unfortunately we didn't hear any recent progress form Replicant.
>>
>>> Regards. Griera.
>>>
>>>
>>>>> So this enables us to boot 2 distros on SD from the bootloader menu and 
>>>>> inifinitely more using gta04-init.
>>>>>
>>>>> This looks like only sane schema to me. We cant skip the first FAT because you 
>>>>> would have no way to flash new bootloader then. And also gta04-init is using 
>>>> The FAT partition is intended to be used only on a separate SD card to flash
>>>> the bootloader. Since this is probably not done every day and is best done
>>>> through the hw-validation image (which needs 2 partitions incompatible to
>>>> your scheme), I would simply ignore that special case for a QtMoko SD card.
>>>>
>>>>> it for the advanced booting to extended partitions and to chroots.
>>>>>
>>>>> We also cant skip the p4 since we need separate partition for media.
>>>> The other question I have is why QtMoko needs to recommend a SHR partition?
>>>>
>>>> Since I am a friend of "KISS", I would recommend that every distro simply
>>>> is expanded to any (properly) formatted *single* partition.
>>>>
>>>> So if the SD has 4 partitions it is like 4 disks on a single physical rack.
>>>> And the AUX boot menu allows to choose which disk. If it only has one - fine! 
>>>>
>>>> If the user wants to have a FAT media partition, let him create one and
>>>> make the distro search/find/mount it.
>>>>
>>>> The above scheme could IMHO be recommended by gta04-init and not
>>>> by QtMoko since it is a third stage bootloader.
>>>>
>>>> Just my 3ct,
>>>> Nikolaus
>>>>
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> I'm inclined to prefer more simplicity here.  I'd like:
>
> p1: distro 1 e.g. QtMoko
> p2: distro 2 e.g. SHR
> p3: distro 3 e.g. Replicant
> p4: media, maps, docs
> NAND: bootloader, Debian/LXDE
>
> Demonstrating multiple OSes is important for me as part of showing off how cool the GTA04 is.  (And also when there are specific applications only provided by one OS.)
>
> For rescue I'm happy to use a separate SD card, so I don't need an initial FAT partition in my main card.
>
> If the bootloader already allows me to choose between the distros, I don't think I need gta04-init anymore - Radek, does gta04-init have other benefits that I'm missing?
>
> Regards,
> Neil
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I prefer more generally usable setups. I want to exchange the card,
especially its media data, with more stupid devices, e.g. my camera.
This means:

p1 - large FAT for gta04-init etc, and for media
p2 - distro 1 e.g. QtMoko
p3 - distro 2 e.g. SHR
...

Regards
Gerhard






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