Solve the problem of Synology DSM7.x installation getting stuck at 55% progress

Execution steps

In the 55% error interface, use telent to log in to the NAS IP address, the user name is root, and the password is empty.

cat /proc/partitions

Record the 3 values ​​of sda (see the picture below)

Several values in nknod need to be replaced with your own

mknod /dev/synoboot b 8 0

mknod /dev/synoboot1 b 8 1

mknod /dev/synoboot2 b 8 2

Then continue the installation and it will be ok.