Invalid flag 0x0000 of EBR (for partition 5) will be corrected by w(rite).
Disk /dev/sdb: 477 GiB, 512110190592 bytes, 1000215216 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: 0xc6eb16e1

Device     Boot     Start       End   Sectors   Size Id Type
/dev/sdb1  *         2048 960108543 960106496 457.8G 83 Linux
/dev/sdb2       960110590 976771071  16660482     8G  5 Extended
/dev/sdb5       960110590 960110590         0     0B  0 Empty

Partition 3 does not start on physical sector boundary.

Partition 6 does not start on physical sector boundary.