Column Name  | Data Type  | Description  | 
array_group_id  | NUMBER  | Internal key, foreign key to aps_array_group, specifies the ID of the RAID group to which this device belongs  | 
auto_assignment  | STRING  | Specifies the current state of auto assignment  | 
auto_trespass  | STRING  | Specifies the state (disabled/enabled) of auto-trespass  | 
device_state  | STRING  | Specifies the current state of the CLARiiON device  | 
first_stripe_nbr  | NUMBER  | Specifies the stripe number in RAID where the device starts  | 
idle_delay_time  | NUMBER  | Specifies the amount of time device must be below the idle-threshold in order to be considered idle  | 
idle_threshold  | NUMBER  | Specifies maximum number of I/Os that can be outstanding to the device and still have the device be considered idle  | 
is_private  | CHAR  | Specifies, if true, that the device is not externally visible  | 
last_updated  | DATE  | Last updated date  | 
logical_unit_id  | NUMBER  | Internal key, foreign key to aps_v_logical_unit  | 
lun_nbr  | NUMBER  | LUN number.  | 
max_prefetch_blk  | NUMBER  | Specifies the maximum size to pre-fetch in response to read request  | 
prefetch_disable_size_blk  | NUMBER  | Specifies the pre-fetch disable size, in blocks  | 
prefetch_idle_count  | NUMBER  | Specifies the maximum number of outstanding I/Os the device can have and still perform pre-fetching  | 
read_cache  | STRING  | Specifies current state of read cache  | 
storage_obj_id  | STRING  | Specifies ID of the CLARiiON that contains the device  | 
stripe_size_blk  | NUMBER  | Specifies the stripe size, in blocks  | 
system_name  | STRING  | System name  | 
variable_length_prefetch  | STRING  | Specifies the current state of variable length pre-fetch  | 
vnx_storage_system_id  | NUMBER  | Internal key, foreign key to aps_vnx_storage_system.vnx_storage_system_id  | 
write_cache  | STRING  | Specifies the current state of write cache  |