Master Boot Record - MBR - Bir Partition Table Tipi

MBR Nedir

Açıklaması şöyle. Yani MBR bir partition table tipi. Partition table bir diskin nasıl bölümlendiği hakkında bilgi verir. Klasik MBR ile bir diski 4 bölüme ayırabiliriz.

Those are partition table styles. A partition table is a data structure on a storage device (typically a HDD or SSD) that describes virtual partitioning of that device. By virtual I mean that it doesn't really change anything physically about the device, it's just a description of user's intent. It's operating system's job to read the partition table and respect it, exposing the disk as a collection of independent partitions rather than one large storage device.

There are many old partition table styles invented by various companies for their purposes, but the one that stood the test of time is usually called MBR nowadays. It shows its age, but was good enough for a very long time. It has two major limitations: first, it supports up to four partitions. This was worked around by inventing extended partition: a partition that takes a single partition slot, but holds unlimited number of inner partitions. The other limitation is impossible to work around: it's unable to address sectors over 232-1. It sounds like a lot, but we've already hit it: it's 2 TB for 512-byte sector disks or 16 TB for 4k sector disks. If your disk is larger than this, MBR will only let you partition up to that much space.

GPT Nedir

GPT yazısına taşıdım

MBR Nerededir

MBR /dev/sda diskinin ilk bir kaç byte'ına denk gelir. Şu komut ile MBR bozulabilir.

Tdd if=/dev/urandom of=/dev/sda conv=fsync status=progress

MBR İçinde Küçük Bir Filesystem Driver Bulunur

 Açıklaması şöyle. BIOS bu driver'ı yükleyip diske erişim sağlandıktan sonra, geri kalan şeyleri system partition'dan yüklenebilir.

... the Master Boot Record is tiny, so all advanced bootloaders try to fit a minimal filesystem driver in there and load the rest of their components from the system partition.

Yani BIOS kontrolü MBR BootLoader'a devreder.

Extended Partition Nedir

Açıklaması şöyle. Eğer diski 4'ten fazla bölüme ayırmak istersek kullanılır.

An Extended Partition is an artifact of MBR 'legacy' disk partitioning, as the MBR system only allows a maximum of four (4) partitions. To have more than four partitions, an Extended Partition is used to hold multiple Logical Partitions.

Açıklaması şöyle.

An extended partition is a partition that can be further divided to create additional partitions.

Basically, the extended partition allows you to have more partitions on a physical drive than you could otherwise have.

Windows 9
Açıklaması şöyle. Windows 9 bunu MBR'yi kullanarak yapıyor.

Windows 9x can employ two kinds of disk drivers: native protected-mode drivers and compatibility-mode DOS drivers, and the former are used in preference to the latter whenever possible.