XPost: comp.sys.mac.system, alt.comp.os.windows-10, comp.mobile.android   
   From: nospam@needed.invalid   
      
   On Wed, 4/16/2025 4:26 PM, Alan wrote:   
   > On 2025-04-16 05:28, Paul wrote:   
   >> On Wed, 4/16/2025 6:53 AM, Daniel70 wrote:   
   >>> On 15/04/2025 6:01 am, Carlos E.R. wrote:   
   >>>> On 2025-04-14 17:48, Frank Slootweg wrote:   
   >>>>> Arno Welzel  wrote:   
   >>>>>> Arno Welzel, 2025-04-14 13:18:   
   >>>>>>   
   >>>>>>> Frank Slootweg, 2025-04-13 15:57:   
   >>>>>> [...]   
   >>>>   
   >>>>   
   >>>>>> Yes, I agree, that Android has the flexibility to user other methods as   
   >>>>>> well, like backup apps, ADB and so on - but this needs enough experience   
   >>>>>> by the user like how to set up ADB on a computer or how to transfer the   
   >>>>>> backup to another device using USB and so on.   
   >>>>>   
   >>>>>     The methods I mentioned do not require the user to setup ADB. The   
   >>>>> Smart Switch Android-to-Windows backup does use a USB-cable, but no ADB.   
   >>>>> The Smart Switch Android app can transfer to another phone by Wi-Fi or   
   >>>>> USB and can backup to cloud, SD-card or USB-stick.   
   >>>>   
   >>>> That's a Samsung app, I understand. What about a generic full backup app,   
   non adb? For any operating system, not Windows only?   
   >>>   
   >>> Don't know about a Samsung App but, in Linux, I can use a 'dd' commandline   
   command to back up both my Windows and Linux installations.   
   >>>   
   >>> Is there a similar commandline command for Android and/or Apple Mac??   
   >>   
   >> On computing devices that support booting from a second OS, you can   
   >> gain "dd" access from the second OS. On my MacG4, I booted the Ubuntu PPC   
   >> DVD, and used Ubuntu "dd" to transfer out the disk (which would be at-rest).   
   >> I used a command line FTP session, and you can mix shell commands into   
   >> the ftp commands -- dd can be piped into a (binary) "put". And on the   
   computer   
   >> I did that on, the GbE at 112MB/sec, that's the fastest interface it has   
   got.   
   >>   
   >> But something like a phone, there are fewer opportunities for tricks like   
   that.   
   >> Rooting the phone, if you can manage it, is as close as you're getting   
   >> to a good time.   
   >>   
   >> On at least one phone, the NAND is hidden underneath something, and   
   >> you can't cable up and read-out the NAND chip with external equipment.   
   >> For some of the devices, it's pretty well secured. You would not expect   
   >> a simple trick to work in such a case.   
   >>   
   >>     Paul   
   >   
   > Or you could just use the "dd" command built into the Unix sub-system of   
   every Mac since Mac OS X was first released in 2001...   
      
   But not make a copy of the disk while it is "hot".   
   The MacG4 Quad Nostril does not have VSS and shadow copy for hot backups.   
      
   The purpose of using a second OS, is so the boot drive is   
   not being accessed and no files are open. It's a forensic copy.   
      
   We do the same thing with Macrium backups. A "hot" backup   
   is good enough for most purposes, and uses VSS. But if you   
   want a "forensic" backup, then you boot the Macrium Rescue CD,   
   and the the C: drive is at-rest and you could even backup   
   pagefile.sys if you wanted. Not that there is a reason to   
   do that.   
      
   On modern Windows, the pagefile is seldom used   
   (in the name of SSD wear...). I don't really understand   
   the technical changes that made it work like that. One   
   reason it doesn't page, is the Memory Compressor, but that's   
   not the whole story. It will page, if the reserve gets too low   
   (you will see a "spike" of pagefile activity, which is better   
   than having the OS crash).   
      
      Paul   
      
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