1 chmdisk 2? -name new_name_arg 3 4? -tier 4.1 tier0_flash 4.1 tier1_flash 4.1 tier_enterprise 4.1 tier_nearline 5? -easytierload 5.1 default 5.1 low 5.1 medium 5.1 high 5.1 very_high 6 mdisk_id 6 mdisk_name