It is a disk that allows you to boot up your computer if your normal method using the hard disk is not working or you deem it safer to boot up from a start-up disk because of a virus risk or other problem. A start-up disk contains all the necessary data to enable your machine to boot. Depending on the circumstances, you can then do whatever is necessary to get your computer back to normal operation.
The system disk is the partition from which the operating system was loaded at startup.
bootdisk.com........you can get it from here
In the Add/Remove Programs icon is a tab called Startup Disk, click the tab
press on startup to display the bootable disks.
It is checking to see if a bootable disk (i.e. windows startup disk) is inserted. Obviously, if it didn't check + your computer didn't work then you wouldn't be able to use your startup disk.
It can help you recover from a failed boot.
Yes
The only BAT (Batch) file on a startup disk is AUTOEXEC.BAT (Auto-Execute). And that's not even mandatory. The AUTOEXEC.BAT runs DOS commands after the command interpreter is loaded.
Four
You must have IO.sys, Msdos.sys and command.com
My Computer, right click on floppy drive-> Format... In the next windows choose Create a MS-DOS startup disk
The fix could be that you are using the wrong startup disk. When you turn your PC or mac on press f1 repeatedly until you come to the startup menu. From this select 'startup' preferences, start up disk and select the right one. If you are unsure there is no harm in trying them all as i doubt you will have more than 2 hard disks.