Blk
rval = st_cmd(un, SCMD_SPACE, Blk(count), SYNC_CMD);
if (st_cmd(un, SCMD_SPACE, Blk(dblk), SYNC_CMD)) {
st_cmd(un, SCMD_SPACE, Blk(dblk), SYNC_CMD)) {
if (st_cmd(un, SCMD_SPACE, Blk(1), SYNC_CMD)) {
if (st_cmd(un, SCMD_SPACE, Blk(1), SYNC_CMD)) {
if (st_cmd(un, SCMD_SPACE, Blk((1)), SYNC_CMD)) {
if (st_cmd(un, SCMD_SPACE, Blk(-1), SYNC_CMD)) {