lfs : problem in starting - cannot open root device sda2

hello
i have install lfs in Vmware
but i have this error :

vfs cannot open root device "sda2" or unknown block(0,0): error -6

Code:# Begin /boot/grub/grub.cfg
set default=0
set timeout=5

insmod ext2
set root=(hd0,2)

menuentry "GNU/Linux, Linux 5.8.3-lfs-10.0" {
linux /boot/vmlinuz-5.8.3-lfs-10.0 root=/dev/sda2 ro
}Code:# Begin /etc/fstab

# file system mount-point type options dump fsck
# order

/dev/sda2 / ext4 defaults 1 1
/dev/sda1 swap swap pri=1 0 0
proc /proc proc nosuid,noexec,nodev 0 0
sysfs /sys sysfs nosuid,noexec,nodev 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
tmpfs /run tmpfs defaults 0 0
devtmpfs /dev devtmpfs mode=0755,nosuid 0 0