blk_non_zero$(nW)TEST5: START: blk_non_zero
 $(nW)blk_non_zero$(nW) 512 $(nW)testfile1 c $(N)$(S) r:0 r:1 r:32312 r:32313 z:0 z:1 r:0
512 block size 512 usable blocks 32313
is zeroed:	1
read      lba 0: {0}
read      lba 1: {0}
read      lba 32312: {0}
read      lba 32313: Invalid argument
set_zero  lba 0
set_zero  lba 1
read      lba 0: {0}
blk_non_zero$(nW)TEST5: DONE