Boot loader get overhead to interpret the extended partition table and get the entry then load the OS. The reason is if OS is installed primary partition then boot loaders easily can find the partition, because MBR contain primary partition entry.īut when u installed in logical partition then that partition entry is residing extended partition table. because that boot code can't capable to access the logical volume. They can't boot the OS, if OS is installed in logical partition. that's why windows OS we must install in primary partition. Here one limitation for some boot loaders like Windows boot-loader. GRUB Boot loader -> Windows Boot loader -> Load Windows Kernel Its holds the partition entries and boot code.įollowing MBR block, the actual partition are begin. Its located in first sector of HDD, CD, other device. Master Boot Record (MBR) is one block with 512 bytes.
Grau grub theme mac os#
If want use these boot loader to boot other OS (Linux, Mac OS X) then we need to tweak using 3rd party tools like easyBCDįor Linux Operating System uses many different boot loaders as distro choice like ISOLINUX, LILO, GRUB These boot loaders are specifically designed to load Windows OS. Microsoft Windows up to Windows XP comes with NTLDR boot loaderįrom Windows Vista onward they use BOOTMGR as a boot loader. Each Operating System shipped with boot loader Bios initialize the peripherals and check the booting order of the device then select the highest priority of the device execute the code stored in MBR of that device. When PC is switched on the system controls goes to BIOS. here i ll share what is boot loader?, how grub2 boot loader is works? and how we can customize? and how we apply the themes?īoot loader is small code reside in MBR to load the kernel(core) of the operating system and give the control to OS. recently i surfing the Linux base concepts then i came to know about grub2. In this post we will discuss the GRUB2 (GRand Unified Boot-loader) in Linux.