Which command would accurately create a 19 G logical volume named galactica in the battlestar volume group using /dev/xvdf1?

• A. lvcreate -L 19G battlestar
• B. lvcreate -n galactica -L 19G battlestar
• C. lvcreate -n battlestar -L 19G galactica
• D. lvcreate -n galactica -L 19G /dev/xvdf1

Answer: (B)

Creating a logical volume in LVM involves choosing the volume group, naming the new LV, and setting its size. The command format typically uses the LV size with -L, the LV name with -n, and then the volume group name. Here you want a 19G LV named galactica inside the battlestar volume group, which already contains the physical device /dev/xvdf1. By specifying the LV name and size and then the VG name, you target the battlestar group and assign the name galactica to the new logical volume. This results in a device like /dev/mapper/battlestar-galactica and uses the free space from the battlestar VG.

Omitting the LV name would leave the new logical volume without a deterministic name. Placing the volume group name as the LV name and the LV name as the VG name flips the roles, attempting to create a logical volume named battlestar in a volume group named galactica, which isn’t correct for the requested outcome. Referencing the physical device path directly (like /dev/xvdf1) is less explicit than naming the target volume group, and while it can work in some contexts, using the VG name keeps the command clear and unambiguous.