iPhone 5s doesn't start after using iCleaner Pro to disable OTA daemon

[urban20]

I have installed iOS 8.1 and jailbroken it with Pangu8 1.1(with Cydia).
Pangu8 untether version is updated to 0.2.
I have disabled OTA update daemon with 'Software Update Killer'. And there hasn't been any problems with 'Software Update Killer'.
http://cydia.saurik.com/package/net.crazy.updateskiller/
Everything was ok except when I have started using iCleaner 7.2.3 version which is meant for iOS 7. I was thinking that it is secure to disable OTA daemon and leave other daemons enabled.
Before disabling OTA update with iCleaner Pro, 'Software Update Killer' was still enabled.
So I have disabled OTA update daemon second time with iCleaner Pro and iPhone 5s doesn't start.
It's like double 'disable OTA update daemon' function isn't working well.
I have left iPhone to turn on and get past Apple logo.
Several times it has shown blue screen. After this blue screen iPhone restarted instantly.
DFU mode is working but I need to save the info from iPhone : it isn't in computer. Some of this info can't be backed up by iTunes. I can't wipe out iPhone 5s.

I have tried to turn on Substrate safe mode by holding Volume Up button and it isn't working.

 

[Intell]

I recall seeing that the Pangu team states to not alter the software update daemon or you will have to restore. You're only option left is to restore your device.

 

[urban20]

Is there any way to backup whole iPhone HDD before restoring ?

 

[Intell]

Nope.

 

[urban20]

Nope.

And what about professionals who work for money ? Would they be able to backup disk without destroying iPhone ?

 

[Intell]

Nope.