The Sipwise C5 supports the modern concept of installing several releases side by side. The ability to switch between the releases simplifies software upgrades and enables rollbacks. You can find all the benefits here here.
The new partitioning logic is simple. The code of services (e.g., kamailio, MariaDB) is separated from the data (e.g., databases, CDR files) generated and processed by the code, and is located in a different partition of the disk. Additionally, there are two partitions for code with different services versions. This way, the version of the code can be switched very quickly, just by rebooting the system. The data partition will be the same for both versions of the code, and it will always be mounted and ready to be used before the services start.
New partition layout:
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 xG 0 disk # Your disk with size X Gb |-sda1 8:1 0 1M 0 part # BIOS legacy boot |-sda2 8:2 0 486M 0 part /boot/efi # UEFI boot `-sda3 8:3 0 yG 0 part # LVM partition `-md0 9:0 0 yG 0 raid1 # SW RAID (if requested) |-ngcp-root 253:0 0 10G 0 lvm / # 'code' partition |-ngcp-fallback 253:1 0 10G 0 lvm # 'fallback' partition `-ngcp-data 253:3 0 zG 0 lvm /ngcp-data # 'data' partition # unassigned space
1st partition: 1M BIOS boot, for BIOS/GPT (legacy) boot
2nd partition: ~500MB EFI System, for UEFI/GPT boot
3rd partition: LVM that is divided into:
The installer can only boot from GPT and does not support msdos partitions anymore. The legacy BIOS systems can also boot from GPT, while (U)EFI systems can only boot from GPT (and not from BIOS/legacy boot).