The Zerofs nbd-client persist option does not work when the Zerofs server restarts.

[rongfengliang]

The Zerofs nbd-client persist option does not work when the Zerofs server restarts, although I had added persist, but ifthe server restarts file system will be read-only

• Zerofs version

0.15.6

• nbd-client options

nbd-client 127.0.0.1 10809 /dev/nbd1 -N database -persist -timeout 600 -connections 4