WDC WD40EZAZ-00SF3B0 WD SMR HDD Format Data Recovery Case Study

One more WD SMR HDD WD40EZAZ-00SF3B0 was recovered by DFL-WD hdd repair tool and DFL-DDP data recovery equipment.

Before repairing the second-translator module 190, the hdd had only 0.2GB data remained, the engineer got the following report:

2022/11/02 09:12:43 —T2 analysis—
2022/11/02 09:12:43 —————————-
2022/11/02 09:12:43 Check SIT:
2022/11/02 09:12:43 SIT Check…OK!
2022/11/02 09:12:43 **********Vacant node count = 0 Overlapped node count = 0
2022/11/02 09:12:43 Traversal completes
2022/11/02 09:12:43 ***Tree root node no. error(Tree=7507,File=7942)
2022/11/02 09:12:43 —Param—
2022/11/02 09:12:43 T2 Format:LBA64V2
2022/11/02 09:12:44 Capacity 512:7814037168
2022/11/02 09:12:44 Capacity 4K:976754646
2022/11/02 09:12:44 Root:7942
2022/11/02 09:12:44 Entry pre node:29
2022/11/02 09:12:44 Max entry sects:65535
2022/11/02 09:12:44 Node size:256
2022/11/02 09:12:44 —Summary—
2022/11/02 09:12:44 Node count:198850
2022/11/02 09:12:44 Used count:13005
2022/11/02 09:12:44 Free count:185845
2022/11/02 09:12:44 —T2 modules—
2022/11/02 09:12:44 T2 size:50905696
2022/11/02 09:12:44 Data pos:13C6800
2022/11/02 09:12:44 Block size:4096
2022/11/02 09:12:44 Free Node ID:24183
2022/11/02 09:12:44 Entry Count:14967
2022/11/02 09:12:44 Used Entry:46
2022/11/02 09:12:44 Total node count = 198850 Used:13005
2022/11/02 09:12:50 Sort LBA
2022/11/02 09:12:51 **********Vacant node count = 0 Overlapped node count = 0
2022/11/02 09:12:51 Valid data = 0.20(GB) Unallocated = 3725.83(GB)
2022/11/02 09:12:51 Vacant Nodes:>=0

After repairing the module 190, the report change to repaired status as below:

2022/11/02 09:12:43 —T2 analysis—
2022/11/02 09:12:43 —————————-
2022/11/02 09:12:43 Check SIT:
2022/11/02 09:12:43 SIT Check…OK!
2022/11/02 09:12:43 **********Vacant node count = 0 Overlapped node count = 0
2022/11/02 09:12:43 Traversal completes
2022/11/02 09:12:43 ***Tree root node no. error(Tree=7507,File=7942)
2022/11/02 09:12:43 —Param—
2022/11/02 09:12:43 T2 Format:LBA64V2
2022/11/02 09:12:44 Capacity 512:7814037168
2022/11/02 09:12:44 Capacity 4K:976754646
2022/11/02 09:12:44 Root:7942
2022/11/02 09:12:44 Entry pre node:29
2022/11/02 09:12:44 Max entry sects:65535
2022/11/02 09:12:44 Node size:256
2022/11/02 09:12:44 —Summary—
2022/11/02 09:12:44 Node count:198850
2022/11/02 09:12:44 Used count:13005
2022/11/02 09:12:44 Free count:185845
2022/11/02 09:12:44 —T2 modules—
2022/11/02 09:12:44 T2 size:50905696
2022/11/02 09:12:44 Data pos:13C6800
2022/11/02 09:12:44 Block size:4096
2022/11/02 09:12:44 Free Node ID:24183
2022/11/02 09:12:44 Entry Count:14967
2022/11/02 09:12:44 Used Entry:46
2022/11/02 09:12:44 Total node count = 198850 Used:13005
2022/11/02 09:12:50 Sort LBA
2022/11/02 09:12:51 **********Vacant node count = 0 Overlapped node count = 0
2022/11/02 09:12:51 Valid data = 0.20(GB) Unallocated = 3725.83(GB)
2022/11/02 09:12:51 Vacant Nodes:>=0
2022/11/02 09:13:20 —T2 analysis—
2022/11/02 09:13:20 —————————-
2022/11/02 09:13:20 Check SIT:
2022/11/02 09:13:20 SIT Check…OK!
2022/11/02 09:13:20 **********Vacant node count = 0 Overlapped node count = 0
2022/11/02 09:13:20 Traversal completes
2022/11/02 09:13:20 —Param—
2022/11/02 09:13:20 T2 Format:LBA64V2
2022/11/02 09:13:20 Capacity 512:7814037168
2022/11/02 09:13:20 Capacity 4K:976754646
2022/11/02 09:13:20 Root:8192
2022/11/02 09:13:20 Entry pre node:29
2022/11/02 09:13:20 Max entry sects:65535
2022/11/02 09:13:20 Node size:256
2022/11/02 09:13:20 —Summary—
2022/11/02 09:13:20 Node count:198850
2022/11/02 09:13:20 Used count:22503
2022/11/02 09:13:20 Free count:176347
2022/11/02 09:13:20 —T2 modules—
2022/11/02 09:13:20 T2 size:50905696
2022/11/02 09:13:20 Data pos:13C6800
2022/11/02 09:13:20 Block size:4096
2022/11/02 09:13:20 Free Node ID:22504
2022/11/02 09:13:20 Entry Count:476879
2022/11/02 09:13:20 Used Entry:475696
2022/11/02 09:13:20 Total node count = 198850 Used:22503
2022/11/02 09:13:22 Sort LBA
2022/11/02 09:13:22 **********Vacant node count = 0 Overlapped node count = 0
2022/11/02 09:13:22 Valid data = 3708.95(GB) Unallocated = 17.07(GB)
2022/11/02 09:13:22 Vacant Nodes:>=0

After repairing module 190, the user wrote the new module 190 to patient HDD and then users get 3708.95(GB) data back by DFL-DDP data recovery equipment.

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