Thread: Prepare for rescue Nokia N900: full backup
View Single Post
ndi's Avatar
ndi is offline ndi
2010-07-01 , 12:13
Posts: 2,050 | Thanked: 1,425 times | Joined on Dec 2009 @ Bucharest
#12
Originally Posted by narcisgarcia View Post
Thanks ndi, your last message sounds very interesting. I'm not much expert in english language, and I've understood partially each one of your answers:
  • I don't know what is "PR"
Stands for Public Release. OS is version 5, so first version is 5.1.0 AKA PR 1.0. Then 1.1 is called PR1.1. Each one is a version of the firmware, released by Nokia.

Originally Posted by narcisgarcia View Post
  • I don't know about which "radio modem" are you talking, or why in this context, same as some GSM or why is related to the question (doesn't it work with a normal software driver as any other device?).
Yes and no. The GSM radio is its own chip, independent from the OS, running a firmware, much like a modem in a PC runs a firmware. The installation of 5.1.2 (PR 1.2) upgraded the chip's firmware. That firmware can't be downgraded, and the driver in 1.2 no longer works with the firmware in 1.1 and the other way around.

Once flashed to 1.2, if you revert to 1.1, 1.1 can't use GSM because the chip is from the future.

Short version, only flash in same version or higher, never backwards. Or GSM doesn't work.

Originally Posted by narcisgarcia View Post
  • "reflashing both the root and the EMMC"... Doesn't the EMMC the internal place where the root is put?
No. N900 has a 256M internal fast flash, where the OS resides. This is root. The EMMC has a 2G partition for "applications", called "home" and the rest of (30?) as "documents", that stuff that gets mounted when you plug in USB. Mainly, because it's FAT and it's easy to share a FAT over USB. The root and home are only visible to the device and via SSH or other services that do this on purpose (ftp, etc)

Home is also where apps install, configs are stored, etc. Not rewriting that could cause things like passwords, settings, etc to stick.

Originally Posted by narcisgarcia View Post
  • The lock code? I've read the Nokia N900 hasn't a lock-in. Is it stored in some else place?
Not that network lock, the lock code when you lock your device so it can't be accessed by others, you know, 12345. Power button> lock device.

Originally Posted by narcisgarcia View Post
  • "modified PR 1.2 there's no telltale"... I don't understand the expression, sorry.
A telltale sign is a sign that tells the whole tale (story) when observed. E.g., corner scratches are telltale signs of dropping the device.

Originally Posted by narcisgarcia View Post
  • "should you fry your device with OS"... are you talking about when replacing a kernel? The Maemo Linux kernel or another kernel? Which are the flashing movements with more possibilities to definitely brick the device? What is "OC"?
I assumed you want to overclock your device. If you don;t know what OC is at first glance, don't do it. And yes, I am talking about replacing the kernel. That is one of the few things you would try to ... er ... change when returning your N900.

Why else revert the thing? Contacts, images, messages can all be deleted from the UI.

Originally Posted by narcisgarcia View Post
  • The Nokia N900 has water coolers?
If you want to. No, I was referring to PC components that have been obviously overclocked. But, since you don't seem to want that, nevermind.

Originally Posted by narcisgarcia View Post
Please, could you explain your answer to make it easier?
Thanks.
Sure. Here you go.
__________________
N900 dead and Nokia no longer replaces them. Thanks for all the fish.

Keep the forums clean: use "Thanks" button instead of the thank you post.
 

The Following User Says Thank You to ndi For This Useful Post: