Partitioning the OS in the UEFI Boot Option
The PTYVG volume partition is divided into three logical volumes. These are the PTYVG-OS, the PTYVG-OS_bak, and the PTYVG-LOGS volume. The PTYVG volume partition contains the OS information.
The following table illustrates the partitioning of the volumes in the PTYVG directory.
| Logical Volume | Description | Default Size |
|---|---|---|
| PTYVG-OS | The root partition | 16 GB |
| PTYVG-OS_bak | The backup for the root partition | 16 GB |
| PTYVG-LOGS | The logs that are in the /var/log directory | 12 GB |
In the UEFI mode, the sda1 is the EFI partition which stores the UEFI executables required to perform the booting process for the system. This .efi file points to the sda3 partition where the GRUB configurations are stored. The grub.cfg file initiates the boot process.
The following table illustrates the partitioning of all the logical volume groups in a single hard disk system.
Table: Partition of Logical Volume Groups
| Partition | Partition Name | Physical Volume | Volume Group | Directory | Directory Path | Size |
| /dev/sda | sda1 | EFI Partition | 400M | |||
| sda2 | 100M | |||||
| sda3 | BOOT | 900M | ||||
| sda4 | Physical Volume 1 | PTYVG | OS | / | 16G | |
| OS_bak | 16G | |||||
| logs | /var/log | 12G | ||||
| sda5 | Physical Volume 2 | PTYVG_DATA | opt | 50% of rest | ||
| opt_bak | 50% of rest |
As shown in the table, the sda1 is the EFI Partition and contains information up to 400 MB. The sda2 is the Unallocated Partition which is required for supporting the GPT and occupies 100 MB. The sda3 is the Boot Partition volume group. It can contain information up to 900 MB. The sda4 is the PTYVG partition and uses 44 GB of hard disk space to store information about the OS and the logs. The remaining partition size is allotted for the data volume group.
For Cloud-based platforms, the opt_bak and the OS_bak directories are not available in the data volume group. The data in the PTYVG_DATA partition is available in the opt directory only.
If you want to use the EFI Boot Option for the ESA, then select the required option while creating the machine.