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Old 12-09-2016, 02:56 PM   #1
eco_bach
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Definition of single vs dual boot - need clarification


Hi
Reading this long article on UEFI and need some clarification on single -vs dual boot

https://help.ubuntu.com/community/UEFI

I describe my machine as dual boot Linux - Windows even though Linux and Windows have their own separate hard drives, but obviously share the same BIOS-UEFI
Is this correct, or would my machine technically be considered 'Single boot' since each OS has their own hard drive?
 
Old 12-09-2016, 03:01 PM   #2
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As far as I'm concerned it's dual-boot if you're booting into the same bootloader (for example GRUB) every time then selecting the OS from there.
 
Old 12-09-2016, 04:41 PM   #3
syg00
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If the {hard,firm}ware can only boot into one instance of an operating system it is single boot.
Else it ain't.

No need to make it any more complicated than it already is.
 
Old 12-09-2016, 08:40 PM   #4
eco_bach
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but I can only switch the os right now thru the BIOS(UEFI) on boot, not later in the process via GRUB - so SINGLE boot?
 
Old 12-09-2016, 08:48 PM   #5
BW-userx
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if you got more then one Operating System on your computer then
one + zero = single boot
one + one = dual boot
one + one + one = tri boot
one + one + one + one = quad boot

etc
 
Old 12-10-2016, 12:00 AM   #6
273
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Quote:
Originally Posted by eco_bach View Post
but I can only switch the os right now thru the BIOS(UEFI) on boot, not later in the process via GRUB - so SINGLE boot?
Yes. In your deliberately awkward case.
 
Old 12-10-2016, 08:44 AM   #7
BW-userx
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Quote:
Originally Posted by 273 View Post
Yes. In your deliberately awkward case.
takes away his bragging rights though, doesn't it?
 
Old 12-10-2016, 09:14 AM   #8
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Quote:
Originally Posted by BW-userx View Post
takes away his bragging rights though, doesn't it?
Well, yes. I sometimes wear Vibram 5 fingers and sometimes wear protective footwear -- so I dual-boot also...
 
Old 12-10-2016, 09:43 AM   #9
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It doesn't matter if you have installed separate OS in separate disk with separate boot loader or multiple OSs with single boot-loader, you'll have only one active instance running at any given time.

The concept of single-boot and dual-boot which you read a lot in manuals or websites are actually referring to single boot-loader with one or multiple OSs attached to it (usually in separate partitions).

In your case, as you have different OS in separate disk with separate boot-loaders, you have Single-Boot Configuration.

Last edited by Madhu Desai; 12-10-2016 at 09:52 AM.
 
Old 12-10-2016, 10:04 AM   #10
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Quote:
Originally Posted by 273 View Post
Well, yes. I sometimes wear Vibram 5 fingers and sometimes wear protective footwear -- so I dual-boot also...
bua da bump - thish (crashing of the cymbal) good play on words.

Last edited by BW-userx; 12-10-2016 at 10:20 AM.
 
Old 12-10-2016, 10:10 AM   #11
BW-userx
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Quote:
Originally Posted by mddnix View Post
In your case, as you have different OS in separate disk with separate boot-loaders, you have Single-Boot Configuration.
@OP

inside a dual-boot computer, so now your life has become more confusing.
 
Old 12-10-2016, 05:12 PM   #12
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My opinion would be the number of bootable OS's on the system from cold boot, not to include choices like pxe/gpxe/ipxe, iscsi/nfs or other networked drives or vm's. May be that one might include usb, sd,cf and other normally removable media.

Last edited by jefro; 12-10-2016 at 08:18 PM.
 
Old 12-10-2016, 07:19 PM   #13
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I consider dual boot to be more than one operating system to choose from at boot time. Your bios may have a boot manager (F12 for boot menu, or something similar). That should allow you to choose legacy or bios boot options, so you don't need to go into bios setup to change it.
 
Old 12-11-2016, 08:08 AM   #14
sundialsvcs
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You're correct that part of the purpose of UEFI is to prevent an operating system from being booted "incorrectly," and/or to prevent booting some other system. (Imagine the "bored midnight operator" who is actually a professional industrial spy or saboteur, with a USB-stick in his pocket, waiting for 3:00 AM.)
 
Old 12-11-2016, 12:07 PM   #15
BW-userx
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Quote:
Originally Posted by sundialsvcs View Post
(Imagine the "bored midnight operator" who is actually a professional industrial spy or saboteur, with a USB-stick in his pocket, waiting for 3:00 AM.)
someone watching too much TV ...

Last edited by BW-userx; 12-11-2016 at 12:19 PM.
 
  


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