[HOWTO] Check MBR Infomation Under Linux
Disclaimer: This content reflects my personal opinions, not those of any organizations I am or have been affiliated with. Code samples are provided for illustration purposes only, use with caution and test thoroughly before deployment.
This was an early technical blog I’ve written on another blogging platform. The content is probably outdated and my writing style was cringey. But I copied it here anyway for archival purposes.
Problem: What is the easy way to see the content of the MBR (Master Boot Record) on a hard disk, say, /dev/hda ?
Answer:
-
Use dd to copy the MBR to a file, open a shell/terminal and type:
dd if=/dev/sda of=mbr.bin bs=512 count=1
This is because MBR is 512KB only.
-
Examine the dumped mbr.bin using command file in linux
file mbr.bin
You should get something like this:
mbr.bin: x86 boot sector; partition 1: ID=0x83, starthead 32, startsector 2048, 62914560 sectors; partition 2: ID=0x82, starthead 254, startsector 62916608, 16777216 sectors; partition 3: ID=0x83, starthead 254, startsector 79693824, 293601280 sectors; partition 4: ID=0x83, starthead 254, startsector 373295104, 251846656 sectors, code offset 0x63
原文發表於 2012年6月19日
