Drawing Page & Block Mapping Table Progress

1. Schematic
Page & Block Mapping Table
2018310242 신승훈

2. Page-level Mapping Scheme
• Page Mapping Scheme
- LPN(4KB) = PPN(4KB)
- 초기화 된 상태의 Block과 Table 상태임
- Write Operation은 아래와 같이 내려옴
1. write(0, 1)
2. write(1, 1)
3. write(2, 1)
4. write(8, 1)
5. write(4, 1)
6. write(5, 1)
LP
N
PP
N
0
1
2
3
4
5
6
7
8
9
10
11
Page-Map Table
PPN #0
PPN #1
PPN #2
PPN #3
PPN #4
PPN #5
PPN #6
PPN #7
PPN #8
PPN #9
PPN #10
PPN #11
PPN #12
PPN #13
PPN #14
PPN #15
Block #0
Block #1
Block #2
Block #3
(Spare Block)

3. Page-level Mapping Scheme
• Page Mapping Scheme
1. write(0, 1) Current Input
2. write(1, 1)
3. write(2, 1)
4. write(8, 1)
5. write(4, 1)
6. write(5, 1)
• For WAF
 Host Write : 1
 NAND Flash Write : 1
 WAF : 1
LP
N
PP
N
0 0
1
2
3
4
5
6
7
8
9
10
11
Page-Map Table
PPN #0 0
PPN #1
PPN #2
PPN #3
PPN #4
PPN #5
PPN #6
PPN #7
PPN #8
PPN #9
PPN #10
PPN #11
PPN #12
PPN #13
PPN #14
PPN #15
Block #0
Block #1
Block #2
Block #3
(Spare Block)
Data Area Spare Area

4. Page-level Mapping Scheme
• Page Mapping Scheme
1. write(0, 1)
2. write(1, 1) Current Input
3. write(2, 1)
4. write(8, 1)
5. write(4, 1)
6. write(5, 1)
• For WAF
 Host Write : 2
 NAND Flash Write : 2
 WAF : 1
LP
N
PP
N
0 0
1 1
2
3
4
5
6
7
8
9
10
11
Page-Map Table
PPN #0 0
PPN #1 1
PPN #2
PPN #3
PPN #4
PPN #5
PPN #6
PPN #7
PPN #8
PPN #9
PPN #10
PPN #11
PPN #12
PPN #13
PPN #14
PPN #15
Block #0
Block #1
Block #2
Block #3
(Spare Block)
Data Area Spare Area

5. Page-level Mapping Scheme
• Page Mapping Scheme
1. write(0, 1)
2. write(1, 1)
3. write(2, 1) Current Input
4. write(8, 1)
5. write(4, 1)
6. write(5, 1)
• For WAF
 Host Write : 3
 NAND Flash Write : 3
 WAF : 1
LP
N
PP
N
0 0
1 1
2 2
3
4
5
6
7
8
9
10
11
Page-Map Table
PPN #0 0
PPN #1 1
PPN #2 2
PPN #3
PPN #4
PPN #5
PPN #6
PPN #7
PPN #8
PPN #9
PPN #10
PPN #11
PPN #12
PPN #13
PPN #14
PPN #15
Block #0
Block #1
Block #2
Block #3
(Spare Block)
Data Area Spare Area

6. Page-level Mapping Scheme
• Page Mapping Scheme
1. write(0, 1)
2. write(1, 1)
3. write(2, 1)
4. write(8, 1) Current Input
5. write(4, 1)
6. write(5, 1)
• For WAF
 Host Write : 4
 NAND Flash Write : 4
 WAF : 1
LP
N
PP
N
0 0
1 1
2 2
3
4
5
6
7
8 3
9
10
11
Page-Map Table
PPN #0 0
PPN #1 1
PPN #2 2
PPN #3 8
PPN #4
PPN #5
PPN #6
PPN #7
PPN #8
PPN #9
PPN #10
PPN #11
PPN #12
PPN #13
PPN #14
PPN #15
Block #0
Block #1
Block #2
Block #3
(Spare Block)
Data Area Spare Area

7. Page-level Mapping Scheme
• Page Mapping Scheme
1. write(0, 1)
2. write(1, 1)
3. write(2, 1)
4. write(8, 1)
5. write(4, 1) Current Input
6. write(5, 1)
• For WAF
 Host Write : 5
 NAND Flash Write : 5
 WAF : 1
LP
N
PP
N
0 0
1 1
2 2
3
4 4
5
6
7
8 3
9
10
11
Page-Map Table
PPN #0 0
PPN #1 1
PPN #2 2
PPN #3 8
PPN #4 4
PPN #5
PPN #6
PPN #7
PPN #8
PPN #9
PPN #10
PPN #11
PPN #12
PPN #13
PPN #14
PPN #15
Block #0
Block #1
Block #2
Block #3
(Spare Block)
Data Area Spare Area

8. Page-level Mapping Scheme
• Page Mapping Scheme
1. write(0, 1)
2. write(1, 1)
3. write(2, 1)
4. write(8, 1)
5. write(4, 1)
6. write(5, 1) Current Input
• For WAF
 Host Write : 6
 NAND Flash Write : 6
 WAF : 1
LP
N
PP
N
0 0
1 1
2 2
3
4 4
5 5
6
7
8 3
9
10
11
Page-Map Table
PPN #0 0
PPN #1 1
PPN #2 2
PPN #3 8
PPN #4 4
PPN #5 5
PPN #6
PPN #7
PPN #8
PPN #9
PPN #10
PPN #11
PPN #12
PPN #13
PPN #14
PPN #15
Block #0
Block #1
Block #2
Block #3
(Spare Block)
Data Area Spare Area

9. Page-level Mapping Scheme
• Page Mapping Scheme
- Write Operation이 아래와 같이 더 내려옴.
- 1~6번 Write 작업은 완료됨.
- 7~13번 Write 작업 수행 시작
1. write(0, 1) 7. write(9, 1)
2. write(1, 1) 8. write(3, 1)
3. write(2, 1) 9. write(5, 1)
4. write(8, 1) 10. write(8, 1)
5. write(4, 1) 11. write(9, 1)
6. write(5, 1) 12. write(3, 1)
Done 13. write(1, 1)
LP
N
PP
N
0 0
1 1
2 2
3
4 4
5 5
6
7
8 3
9
10
11
Page-Map Table
PPN #0 0
PPN #1 1
PPN #2 2
PPN #3 8
PPN #4 4
PPN #5 5
PPN #6
PPN #7
PPN #8
PPN #9
PPN #10
PPN #11
PPN #12
PPN #13
PPN #14
PPN #15
Block #0
Block #1
Block #2
Block #3
(Spare Block)
Data Area Spare Area

10. Page-level Mapping Scheme
• Page Mapping Scheme
7. write(9, 1) Current Input
8. write(3, 1)
9. write(5, 1)
10. write(8, 1)
11. write(9, 1)
12. write(3, 1)
13. write(1, 1)
• For WAF
 Host Write : 7
 NAND Flash Write : 7
 WAF : 1
LP
N
PP
N
0 0
1 1
2 2
3
4 4
5 5
6
7
8 3
9 6
10
11
Page-Map Table
PPN #0 0
PPN #1 1
PPN #2 2
PPN #3 8
PPN #4 4
PPN #5 5
PPN #6 9
PPN #7
PPN #8
PPN #9
PPN #10
PPN #11
PPN #12
PPN #13
PPN #14
PPN #15
Block #0
Block #1
Block #2
Block #3
(Spare Block)
Data Area Spare Area

11. Page-level Mapping Scheme
• Page Mapping Scheme
7. write(9, 1)
8. write(3, 1) Current Input
9. write(5, 1)
10. write(8, 1)
11. write(9, 1)
12. write(3, 1)
13. write(1, 1)
• For WAF
 Host Write : 8
 NAND Flash Write : 8
 WAF : 1
LP
N
PP
N
0 0
1 1
2 2
3 7
4 4
5 5
6
7
8 3
9 6
10
11
Page-Map Table
PPN #0 0
PPN #1 1
PPN #2 2
PPN #3 8
PPN #4 4
PPN #5 5
PPN #6 9
PPN #7 3
PPN #8
PPN #9
PPN #10
PPN #11
PPN #12
PPN #13
PPN #14
PPN #15
Block #0
Block #1
Block #2
Block #3
(Spare Block)
Data Area Spare Area

12. Page-level Mapping Scheme
• Page Mapping Scheme
7. write(9, 1)
8. write(3, 1)
9. write(5, 1) Current Input (Update)
10. write(8, 1)
11. write(9, 1)
12. write(3, 1)
13. write(1, 1)
• For WAF
 Host Write : 9
 NAND Flash Write : 9
 WAF : 1
LP
N
PP
N
0 0
1 1
2 2
3 7
4 4
5 5-
>8
6
7
8 3
9 6
10
11
Page-Map Table
PPN #0 0
PPN #1 1
PPN #2 2
PPN #3 8
PPN #4 4
PPN #5
(invalid)
5
PPN #6 9
PPN #7 3
PPN #8 5
PPN #9
PPN #10
PPN #11
PPN #12
PPN #13
PPN #14
PPN #15
Block #0
Block #1
Block #2
Block #3
(Spare Block)
Data Area Spare Area

13. Page-level Mapping Scheme
• Page Mapping Scheme
7. write(9, 1)
8. write(3, 1)
9. write(5, 1)
10. write(8, 1) Current Input (Update)
11. write(9, 1)
12. write(3, 1)
13. write(1, 1)
• For WAF
 Host Write : 10
 NAND Flash Write : 10
 WAF : 1
LP
N
PP
N
0 0
1 1
2 2
3 7
4 4
5 5-
>8
6
7
8 3-
>9
9 6
10
11
Page-Map Table
PPN #0 0
PPN #1 1
PPN #2 2
PPN #3
(invalid)
8
PPN #4 4
PPN #5
(invalid)
5
PPN #6 9
PPN #7 3
PPN #8 5
PPN #9 8
PPN #10
PPN #11
PPN #12
PPN #13
PPN #14
PPN #15
Block #0
Block #1
Block #2
Block #3
(Spare Block)
Data Area Spare Area

14. Page-level Mapping Scheme
• Page Mapping Scheme
7. write(9, 1)
8. write(3, 1)
9. write(5, 1)
10. write(8, 1)
11. write(9, 1) Current Input (Update)
12. write(3, 1)
13. write(1, 1)
• For WAF
 Host Write : 11
 NAND Flash Write : 11
 WAF : 1
LP
N
PP
N
0 0
1 1
2 2
3 7
4 4
5 5-
>8
6
7
8 3-
>9
9 6-
>10
10
Page-Map Table
PPN #0 0
PPN #1 1
PPN #2 2
PPN #3
(invalid)
8
PPN #4 4
PPN #5
(invalid)
5
PPN #6
(invalid)
9
PPN #7 3
PPN #8 5
PPN #9 8
PPN #10 9
PPN #11
PPN #12
PPN #13
PPN #14
PPN #15
Block #0
Block #1
Block #2
Block #3
(Spare Block)
Data Area Spare Area

15. Page-level Mapping Scheme
• Page Mapping Scheme
7. write(9, 1)
8. write(3, 1)
9. write(5, 1)
10. write(8, 1)
11. write(9, 1)
12. write(3, 1) Current Input (Update)
13. write(1, 1)
• For WAF
 Host Write : 12
 NAND Flash Write : 12
 WAF : 1
LP
N
PP
N
0 0
1 1
2 2
3 7-
>11
4 4
5 5-
>8
6
7
8 3-
>9
9 6-
>10
10
Page-Map Table
PPN #0 0
PPN #1 1
PPN #2 2
PPN #3
(invalid)
8
PPN #4 4
PPN #5
(invalid)
5
PPN #6
(invalid)
9
PPN #7
(invalid)
3
PPN #8 5
PPN #9 8
PPN #10 9
PPN #11 3
PPN #12
PPN #13
PPN #14
PPN #15
Block #0
Block #1
Block #2
Block #3
(Spare Block)
Data Area Spare Area

16. Page-level Mapping Scheme
• Garbage Collection
- Input : 13. write(1, 1) Current Input
- Spare Block을 제외한 Block에서 순차 쓰기 완료
먼저, 각 Block에 대한 Invalidation Page를 Count함.
- Invalidation Count
 Block #0 – 1
 Block #1 – 3 (GC 수행)
 Block #2 – 0
- GC Policy
 가장 Invalidation Count가 큰 Block을 선택
LP
N
PP
N
0 0
1 1
2 2
3 7-
>11
4 4
5 5-
>8
6
7
8 3-
>9
9 6-
>10
10
Page-Map Table
PPN #0 0
PPN #1 1
PPN #2 2
PPN #3
(invalid)
8
PPN #4 4
PPN #5
(invalid)
5
PPN #6
(invalid)
9
PPN #7
(invalid)
3
PPN #8 5
PPN #9 8
PPN #10 9
PPN #11 3
PPN #12
PPN #13
PPN #14
PPN #15
Block #0
Block #1
Block #2
Block #3
(Spare Block)
Data Area Spare Area

17. Page-level Mapping Scheme
PPN #4 4
PPN #5
(invalid)
5
PPN #6
(invalid)
9
PPN #7
(invalid)
3
PPN #12 4
PPN #13
PPN #14
PPN #15
Block #1
(Victim Block)
Block #3
(Spare Block)
PPN #4
PPN #5
PPN #6
PPN #7
Block #1
(Spare Block)
PPN #12 4
PPN #13
PPN #14
PPN #15
Block #3
(Data Block)
① Valid Page Copy back to Spare Block
- NAND Flash Write Count가 1 증가함 -> WAF 증가 영향
② Erase Victim Block
③ Spare Block Switching (3->1), 순차 쓰기 PPN #13부터 적용
①
② ③
current_page_offset

18. Page-level Mapping Scheme
• Garbage Collection 수행 후
• For WAF
 Host Write : 12
 NAND Flash Write : 13
 WAF : 1.08
LP
N
PP
N
0 0
1 1
2 2
3 7-
>11
4 4-
>12
5 5-
>8
6
7
8 3-
>9
9 6-
>10
10
Page-Map Table
PPN #0 0
PPN #1 1
PPN #2 2
PPN #3
(invalid)
8
PPN #4
PPN #5
PPN #6
PPN #7
PPN #8 5
PPN #9 8
PPN #10 9
PPN #11 3
PPN #12 4
PPN #13
PPN #14
PPN #15
Block #0
Block #1
(Spare Block)
Block #2
Block #3
Data Area Spare Area

19. Page-level Mapping Scheme
• Last Input : 13. write(1,1) Update
• For WAF
 Host Write : 13
 NAND Flash Write : 14
 WAF : 1.77
LP
N
PP
N
0 0
1 1-
>13
2 2
3 7-
>11
4 4-
>12
5 5-
>8
6
7
8 3-
>9
9 6-
>10
Page-Map Table
PPN #0 0
PPN #1 1
PPN #2 2
PPN #3
(invalid)
8
PPN #4
PPN #5
PPN #6
PPN #7
PPN #8 5
PPN #9 8
PPN #10 9
PPN #11 3
PPN #12 4
PPN #13 1
PPN #14
PPN #15
Block #0
Block #1
(Spare Block)
Block #2
Block #3
Data Area Spare Area

20. Block Mapping Table

21. Block-level Mapping Scheme
• Block Mapping Scheme
- LBN to PBN
- Page per Block = 4
- 초기화 된 상태의 Block과 Table 상태임
- Write Operation은 아래와 같이 내려옴
1. write(5, 1)
2. write(6, 1)
3. write(4, 1)
LB
N
PBN
0
1 PBN #0
2
Block-Map Table
Page 0
Page 1
Page 2
Page 3
PBN #0
Page 0
Page 1
Page 2
Page 3
PBN #1
Page 0
Page 1
Page 2
Page 3
PBN #2
Page 0
Page 1
Page 2
Page 3
PBN #3

22. Block-level Mapping Scheme
• Block Mapping Scheme
1. write(5, 1) Current Input
- 5 / 4 = 1 (LBN)
- 5 % 4 = 1 (Page Offset)
2. write(6, 1)
3. write(4, 1)
LB
N
PBN
0
1 PBN #0
2
Block-Map Table
Page 0
Page 1
Page 2
Page 3
PBN #0
Page 0
Page 1
Page 2
Page 3
PBN #1
Page 0
Page 1
Page 2
Page 3
PBN #2
Page 0
Page 1
Page 2
Page 3
PBN #3

23. Block-level Mapping Scheme
• Block Mapping Scheme
1. write(5, 1)
2. write(6, 1) Current Input
- 6 / 4 = 1 (LBN)
- 6 % 4 = 2 (Page Offset)
3. write(4, 1)
LB
N
PBN
0
1 PBN #0
2
Block-Map Table
Page 0
Page 1
Page 2
Page 3
PBN #0
Page 0
Page 1
Page 2
Page 3
PBN #1
Page 0
Page 1
Page 2
Page 3
PBN #2
Page 0
Page 1
Page 2
Page 3
PBN #3

24. Block-level Mapping Scheme
• Block Mapping Scheme
1. write(5, 1)
2. write(6, 1)
3. write(4, 1) Current Input
- 4 / 4 = 1 (LBN)
- 4 % 4 = 0 (Page Offset)
- 순차 쓰기 불가능!
LB
N
PBN
0
1 PBN #0
2
Block-Map Table
Page 0
Page 1
Page 2
Page 3
PBN #0
Page 0
Page 1
Page 2
Page 3
PBN #1
Page 0
Page 1
Page 2
Page 3
PBN #2
Page 0
Page 1
Page 2
Page 3
PBN #3

25. Block-level Mapping Scheme
• Block Mapping Scheme
1. write(5, 1)
2. write(6, 1)
3. write(4, 1) Current Input
- 4 / 4 = 1 (LBN) -> PBN #1
- 4 % 4 = 0 (Page Offset)
LB
N
PBN
0
1 #0 ->
#1
2
Block-Map Table
Page 0
Page 1
Page 2
Page 3
PBN #0
Page 0
Page 1
Page 2
Page 3
PBN #1
Page 0
Page 1
Page 2
Page 3
PBN #2
Page 0
Page 1
Page 2
Page 3
PBN #3
Erase Block
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