GV$MAP_FILE_IO_STACK

select
inst_id,                 -- INST_ID NUMBER
file_idx,                -- FILE_MAP_IDX NUMBER
depth,                   -- DEPTH NUMBER
elem_idx,                -- ELEM_IDX NUMBER
cu_size,                 -- CU_SIZE NUMBER
stride,                  -- STRIDE NUMBER
num_cu,                  -- NUM_CU NUMBER
dev_offset,              -- ELEM_OFFSET NUMBER
to_number                -- FILE_OFFSET NUMBER
  (decode (file_offset, 4294967295, NULL, file_offset)),
decode                   -- DATA_TYPE VARCHAR2(15)
  (data_type, 1, 'DATA', 2, 'PARITY', 3, 'DATA AND PARITY'),
parity_pos,              -- PARITY_POS NUMBER
parity_perd,             -- PARITY_PERIOD NUMBER
row_id,                  -- ID NUMBER
prow_id                  -- PARENT_ID NUMBER
from
x$ksfmiost
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