Zpool status ok but no discs and volumes visible in GUI any more

Dear All,

after a restarts of the NAs inside the BIOS we still see 4 drives. Web GUI is starting normal but the Volume and the 4 physical drives are not visible any more.

if we do a zpool status we see the 4 drives and the state is online.

we we are having no access any more to the shares etc.

any idea what´s happens ???

many thanks !!!

Best Regards
Holger