blk_non_zero$(nW)TEST3: START: blk_non_zero
 $(nW)blk_non_zero$(nW) 512 $(nW)testfile1 c 0 w:100 w:200 w:300 w:400 r:100 r:200 r:300 r:400 w:100 z:200 w:300 z:400 r:100 r:200 r:300 r:400 e:100 w:200 e:300 w:400 r:100 r:200 r:300 r:400
512 block size 512 usable blocks 2080567
is zeroed:	0
write     lba 100: {1}
write     lba 200: {2}
write     lba 300: {3}
write     lba 400: {4}
read      lba 100: {1}
read      lba 200: {2}
read      lba 300: {3}
read      lba 400: {4}
write     lba 100: {5}
set_zero  lba 200
write     lba 300: {6}
set_zero  lba 400
read      lba 100: {5}
read      lba 200: {0}
read      lba 300: {6}
read      lba 400: {0}
set_error lba 100
write     lba 200: {7}
set_error lba 300
write     lba 400: {8}
read      lba 100: Input/output error
read      lba 200: {7}
read      lba 300: Input/output error
read      lba 400: {8}
blk_non_zero$(nW)TEST3: DONE