Devices is relocated, resume network connection after relocation in new equipment room. Log on system, it cannot discover disks mirrored from array. Rescan disks or disconnect and rescan, disks still cannot be discovered.
Connect VIS to right switcher, reboot VIS and scan disk, system discover disks normally.
Make sure that no error information on VIS6000, check array, array works normally. Try to ping array service port, failed. Check link, it display link is OK. Customer use shelf distribution frame to connect switchers. Check the link between distribution frame and switchers. The distribution frame is connected to a wrong switcher instead of the switcher connected to array. Reconnect and reboot VIS to scan disk, it is OK.