Hoje irei demonstrar de forma simples como converter uma partição MBR para GPT, antes de qualquer mudança em produção façam testes de homologação e backups por segurança.
1 – Verificando os discos do servidor.
[root@lab11g ~]# fdisk -l | grep "/dev/s"
Disk /dev/sdb: 10.7 GB, 10737418240 bytes, 20971520 sectors
/dev/sdb1 2048 20971519 10484736 83 Linux
Disk /dev/sda: 107.4 GB, 107374182400 bytes, 209715200 sectors
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 209715199 103808000 8e Linux LVM
[root@lab11g ~]# df -Th | grep "^/dev"
/dev/mapper/ol-root xfs 95G 27G 69G 28% /
/dev/sda1 xfs 1014M 217M 798M 22% /boot
/dev/sdb1 xfs 10G 33M 10G 1% /backup
2 – Disco que iremos converter.
[root@lab11g ~]# df -Th | grep "^/dev"
/dev/mapper/ol-root xfs 95G 27G 69G 28% /
/dev/sda1 xfs 1014M 217M 798M 22% /boot
/dev/sdb1 xfs 10G 33M 10G 1% /backup <=======
root@lab11g ~]# ls -lat /backup/
total 24
-rw-r--r-- 1 root root 64 Oct 1 07:48 file5.txt
-rw-r--r-- 1 root root 131 Oct 1 07:48 file4.txt
-rw-r--r-- 1 root root 97 Oct 1 07:47 file3.txt
-rw-r--r-- 1 root root 78 Oct 1 07:47 file2.txt
drwxr-xr-x 2 root root 91 Oct 1 07:47 .
-rw-r--r-- 1 root root 5 Oct 1 07:47 file1.txt
dr-xr-xr-x. 24 root root 4096 Sep 30 07:27 ..3 – Como todos sabemos, partições do tipo MBR possuem o limite de 2TB, desta forma necessitamos que o nosso disco possa ter expansão acima de 2TB, antes de qualquer mudança façam backups e testes antes de aplicar em produção.
3.1 – Antes de realizar o processo para converter MBR em GPT, devemos validar se existe espaço livre ou redimensionar o disco para que possamos ter espaço livre para esta operação.
[root@lab11g ~]# umount /backup
[root@lab11g ~]# gdisk /dev/sdb
GPT fdisk (gdisk) version 0.8.6
Partition table scan:
MBR: MBR only <================== Disk is using MBR.
BSD: not present
APM: not present
GPT: not present
***************************************************************
Found invalid GPT and valid MBR; converting MBR to GPT format.
THIS OPERATION IS POTENTIALLY DESTRUCTIVE! Exit by typing 'q' if
you don't want to convert your MBR partitions to GPT format!
***************************************************************
Command (? for help): w <============ Options used for conversion
Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING
PARTITIONS!!
Do you want to proceed? (Y/N): y <========== YES
Options used for conversion
OK; writing new GUID partition table (GPT) to /dev/sdb.
The operation has completed successfully.3.2 – Montar disco /dev/sdb1.
[root@lab11g ~]# mount /dev/sdb1 /backup/
[root@lab11g ~]# ls -lat /backup/
total 24
-rw-r--r-- 1 root root 64 Oct 1 07:48 file5.txt
-rw-r--r-- 1 root root 131 Oct 1 07:48 file4.txt
-rw-r--r-- 1 root root 97 Oct 1 07:47 file3.txt
-rw-r--r-- 1 root root 78 Oct 1 07:47 file2.txt
drwxr-xr-x 2 root root 91 Oct 1 07:47 .
-rw-r--r-- 1 root root 5 Oct 1 07:47 file1.txt
dr-xr-xr-x. 24 root root 4096 Sep 30 07:27 ..3.3 – Confirmando o novo tipo GPT.
[root@lab11g ~]# fdisk -l /dev/sdb
WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion.
Disk /dev/sdb: 11.8 GB, 11811160064 bytes, 23068672 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: gpt <================== New GPT type. =====
Disk identifier: B7B0EB3A-08CA-4E04-AF4E-85EECA62E9B7
# Start End Size Type Name
1 2048 20971519 10G Linux filesyste Linux filesystem