I have a situation with ubuntu, I have a disk of 250 Gb that is in raid 1 +0 LVM with the utility of arrangement of the server and another disk of 600 Gb (that will use to mount and generate backups). The issue is that when installing ubuntu (standard system), I only create a partition / root and the swap (in fact I created it with guided partitioning). But when consulting (fdisk -l) I see the following:
root@sop138:~# fdisk -l
Disk /dev/sdb: 558.9 GiB, 600093712384 bytes, 1172058032 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
Disklabel type: dos
Disk identifier: 0x2ee04e7a
Disk /dev/sda: 223.6 GiB, 240021504000 bytes, 468792000 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0xdaf3ad36
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 466790399 466788352 222.6G 83 Linux
/dev/sda2 466792446 468791295 1998850 976M 5 Extended
/dev/sda5 466792448 468791295 1998848 976M 82 Linux swap / Solaris
Partition 2 does not start on physical sector boundary.
I get the error message that I read is because it is wrong calculated. However to solve it I do not understand how, or what would be the partition 2. Could someone guide me?