[CentOS] how can I tell what's on the MBR of /dev/sda?
Chuck Campbell
campbell at accelinc.com
Fri Apr 10 18:59:22 UTC 2015
On 4/9/2015 8:34 PM, John R Pierce wrote:
> On 4/9/2015 5:22 PM, Chuck Campbell wrote:
>> Subject says it.
>>
>> I would like to find out if I have anything written on the MBR of a
>> disk in my system /dev/sda, or any other device.
>> If there is something there, is it readable, or recognizable to humans?
> the MBR contains both binary boot code, which is not human readable, and
> the master partiion table for the device. you can display the latter like...
>
> $ sudo parted /dev/sda print
> Model: ATA Crucial_CT512M55 (scsi)
> Disk /dev/sda: 512GB
> Sector size (logical/physical): 512B/4096B
> Partition Table: msdos
>
> Number Start End Size Type File system Flags
> 1 1049kB 525MB 524MB primary ext4 boot
> 2 525MB 512GB 512GB primary lvm
>
>
>
Mine looks similar to the above. Partition table is msdos, I have different
partitions, but the number 1 is my /boot, where grub is installed, and it shows
as type ext2.
However, when I try to boot it grub says
Filesystem type unknown, partition type 0xee
and won't load /vmlinuz
Googling this says it is a GUID partition table (gpt), in spite of what parted
said???
-chuck
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