https://kb.synology.com/ja-jp/DSM/help/DSM/AdminCenter/system_externaldevice_devicelist?version=7https://kb.synology.com/ja-jp/DSM/tutorial/Which_Synology_NAS_models_support_the_Btrfs_file_systemDSMからbtrfsでフォーマットできないので (ext4…

ext4 65,000 btrfs 65,535 EMLINK The file referred to by oldpath already has the maximum number of links to it. For example, on an ext4(5) filesystem that does not employ the dir_index feature, the limit on the number of hard links to a fil…