blk_non_zero$(nW)TEST9: START: blk_non_zero
 $(nW)blk_non_zero$(nW) 512 $(nW)testfile1 c 0 e:1 r:1 e:2 w:2 r:2 z:3 e:3 r:3 e:4 z:4 r:4 w:5 e:5 z:5 r:5 w:6 z:6 e:6 r:6
512 block size 512 usable blocks 259784
is zeroed:	0
set_error lba 1
read      lba 1: Input/output error
set_error lba 2
write     lba 2: {1}
read      lba 2: {1}
set_zero  lba 3
set_error lba 3
read      lba 3: Input/output error
set_error lba 4
set_zero  lba 4
read      lba 4: {0}
write     lba 5: {2}
set_error lba 5
set_zero  lba 5
read      lba 5: {0}
write     lba 6: {3}
set_zero  lba 6
set_error lba 6
read      lba 6: Input/output error
blk_non_zero$(nW)TEST9: DONE