Disaster Data Recovery HDD Method
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The document discusses disaster data recovery methods for HDDs. It describes how physical damage from events like floods, earthquakes or head crashes can corrupt HDD components like the PCB, firmware or platters, preventing normal access to data storage areas. The document outlines challenges in recovering data from scratched or dusty platters due to their close proximity to read/write heads. It proposes research into precision surface cleaning and analysis techniques to improve data recovery rates from physically damaged HDDs.
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Disaster Data Recovery HDD Method
- 1. Disaster Data Recovery method for HDD by Dai Shimogaito January, 17th, 2014 at CODEBLUE in Tokyo
- 2. What is Disaster Recovery ? 1.To Recover Computer System which had suffered from natural disaster, like tsunami, river flood, storm, and earthquake Platter Surface Damage 2.To Protect Computer System and get Ready for a large scale crash. AFTER Disaster The most difficult problem for data recovery BEFORE Disaster Physical Damage caused by Software HDD Customization for Platter Damage
- 3. Three Failures Lead to Data Loss • Logical Failure • System failure • Data corruption • Deletion of data. • Electronic Failure • Printed Circuit Board (PCB) • On or more of the PCB components • ROM or the System Area data is damaged. • Physical Failure • Sticktion • Spindle bearing is frozen • Head crash (dropped hard drive).
- 4. Features of HDD which suffered from natural disaster 1. Chips on PCB are gone 2. HDD falls down and gets stong shock 3. Dirt comes inside HDD 4. Water comes inside HDD Severe Damage ! Normal Data Recovery Process is useless, because the damage level is extremely high
- 5. After a Natural Disaster, HDD can look like this
- 6. What is Data Recovery ? Trying to image data from non-accessible HDD sector by sector. アクセス不能なHDDから、できるだけ多くのデータをクローンコピー取得を試 みる Copy Broken No access to data （故障でアクセス不能） Good Full Access to data （正常動作するHDD）
- 7. What is Data Recovery ? Basically, parts replacement is the way for temporary repair. 基本的には、故障した部品を交換して、一時的にHDDを復活させます。 Fire Accident
- 8. What is Data Recovery ? 100% clone is always preferrable, but the result depends on the type of damage to HDD and the data recovery process. できれば100％クローンコピーの作成が望ましいのですが、故障の種類や損傷の 強弱、そして復旧プロセスの違いによっては、回収率が低くなることがあります 。 ← Low High →
- 9. Replaceability with Donor Part （ドナー部品との置換性） HSA YES [ Head Stack Assembly ] Head Map, Capacity, Architecture Family, Microjog SPM YES [ Spindle Motor ] Seizure Problem, Lubricating oil PCB YES [ Printed Circuit Board ] Serial ROM, NV-RAM, Fuse, Resister, Diode, Capacitor, Coil, Microchip / Repairment is also useful FW YES & NO [ Firmware ] Unique module, Non-unique module, Regeneratable module, Essential Module Disk NO [ Platter ] Bad Sector, Scratch, particules on surface
- 10. Replaceability with Donor Part （ドナー部品との置換性） HSA YES SPM YES PCB YES FW YES & NO Disk NO
- 11. Replaceability with Donor Part （ドナー部品との置換性） HSA YES SPM YES PCB YES FW YES & NO Disk NO スラスト軸受 回転方向 ジャーナル軸受 回転方向 潤滑油 溝 ディスク
- 12. Replaceability with Donor Part （ドナー部品との置換性） HSA YES SPM YES PCB YES FW YES & NO Disk NO
- 13. Replaceability with Donor Part （ドナー部品との置換性） HSA YES SPM YES PCB YES FW YES & NO Disk NO SA Service Area UA User Area SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA Firmware = Service Modules SA Modules are located on platters
- 14. Replaceability with Donor Part （ドナー部品との置換性） HSA YES SPM YES PCB YES FW YES & NO Disk NO Data is recorded into platters. Replacement means nothing.
- 15. Replaceability with Donor Part HSA YES [ Head Stack Assembly ] Head Map, Capacity, Architecture Family, Microjog SPM YES [ Spindle Motor ] If unique parts are corrupt, Seizure Problem, there Lubricating is no way oil to recover data PCB YES [ Printed Circuit Board ] Serial ROM, NV-RAM, Fuse, Resister, Diode, Capacitor, Coil, Microchip / Repairment is also useful FW YES & NO [ Firmware ] Unique module, Non-unique module, Regeneratable module, Essential Module Disk NO [ Platter ] Bad Sector, Scratch, particules on surface
- 16. The Most Difficult problem is Platter Damage 3.5inch PATA
- 17. The Most Difficult problem is Platter Damage 2.5inch SAS
- 18. The Most Difficult problem is Platter Damage
- 19. The Most Difficult problem is Platter Damage
- 20. The Most Difficult problem is Platter Damage
- 21. For a long time, DR from scratched disk has been impossible If the surface is partially damaged, there should be recoverable data in the areas which were not damaged. 部分的にしかキズが付いていないなら、 それ以外の部分にはデータは残っている はず、、、、、、
- 22. Why is it so difficult to read damaged surface ? Let’s take an extreme close look at Disk & Head !
- 23. Disk Surface & Slider Flying Height 1-3 nm Lubricant Layer 1nm 潤滑層Diamond Like Carbon Coating Layer コーティング 層 Magnetic Layer 磁性層 3nm Disk Rotation Direction → 1 ～3nm Slider スライダ R/W Head
- 24. The gap between Head and Disk is very small Slider Flying Height 1-3nm PPaarrttiiccllee SSiizzee ooff CCiiggaarreettttee SSmmookkee 110000--11000000nnmm
- 25. How head crash damages the surface Slider R/W Lubricant Layer DLC Layer Magnetic Layer Head Slider R/W Lubricant Layer DLC Layer Magnetic Layer Head Slider R/W Lubricant Layer DLC Layer Magnetic Layer Head
- 26. Cause of malfunction of HSA when reading damaged surface 1. Scratch is not the main cause of the bad operation of Head Stack Assembly 2. Particles on the surface stick to sliders. 3. Slider’s flying becomes unstable because of the particles on the surface of the disk and the sliders. So, Let’s clean the surface !
- 28. NO DUST NO PROBLEM
- 29. The 1st step of the research completed with a good result 94% UP ! 0.02% Newspaper : Nikkei Business Daily, 26th Septempber 2013
- 30. Precise surface analyzing is required for better recovery Optical Surface Analyzer
- 31. July 2012, research was started by Prof.Hiroshi Tani Prof. Hiroshi Tani @ Kansai Univ.
- 32. What we can do BEFORE disater occurs Physical Damage caused by Software ??? ソフトウェアがハードウェアを壊す？？？
- 33. What is the HDD’s Boot Sequence ? Let’s go to the finish line together with everyone ! Start Finish
- 34. HDD’s Boot Sequence Needs to complete each sequence, then can reach to “Ready” mode PowerON Ready
- 35. User Area & Service Area SA Service Area UA User Area SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA
- 36. SA Modules • P-List : Primary Defect List • G-List : Growth Defect List • Translator : LBA access ⇔ PBA access • S.M.A.R.T. Self-Monitoring Analysis and Reporting Technology
- 37. Defects × × × × × × × × Defects info = Position of Bad Sectors in PBA
- 38. Defects info is Unique to each disk × × × × × × × × × × × × × × × × × × × × × × × × × × × × × × × × × × × ×
- 39. Defects info is Unique to each disk P-List : Primary Defect List × × × × × × × × G-List : Growth Defect List × × × × × × × × × × × ×××
- 41. PBA（物理アドレス）とLBA（論理アドレス） LBA exists logically upon PBA. The following shows good sectors from address 0. 通常、“アドレス”や“セクタ”が指す対象は論理アドレスのこと。 下図は、欠陥セクタが無い正常なセクタが連続している領域の状態を示していま す。 Physical Block Address 物理アドレス → 0 1 2 3 4 5 Logical Block Address 論理アドレス → 0 1 2 3 4 5
- 42. Defects Controlling （不良物理セクタの管理） 物理アドレス → P-List Table 2・・・ 0 1 2 3 4 5 論理アドレス → 0 1 2 3 4
- 43. Translator Converter function between LBA and PBA If the translator is broken, no data is accessible. One of the most important module. 論理アドレスと物理アドレスの変換テーブル このデータが読めなければ、プラッタ上の全ての磁気データを読み出すことができたとしても、ファイル やフォルダは一切復旧できません。SAモジュールの中でもトップクラスの重要度です。 PBA 物理アドレス LBA 論理アドレス 0001 0687 1968 3786 9821 0001 0508 3544 9871 0051 Access Request From Host ホストからの Access to the physically アクセス要求 Assigned position プラッタ上の指定 エリアにアクセス
- 44. SA Modules are loaded into PCB SA Module SA Module SA Module SA Module SA Module SA Module SA Module SA Module SA Module SA Module Complete (^o^)
- 45. When SA Modules loading completes fine PowerON Ready Wow , I did it ! I have access to all data ! やった！ LBA全域アクセス できるぞー！ LBA Zone
- 46. Damage of SA Module SA Module SA Module SA Module SA Module SA Module SA Module SA Module SA Module SA Module SA Module Error！ Can’t Read Or Module is corrupted ABORT
- 47. Damage of SA Module : No LBA Access PowerON Ready I can’t access LBA zone, because there was a SA module error. The data should be in LBA Zone, but I can not access LBA 0 SAモジュールに異常があった から、LBA領域にアクセスで きない。HDDにはデータある はずなのにな。 LBA Zone
- 48. NO SA NO DATA
- 49. If the SA module error was caused intentionally by ,,,,, もし、誰かがわざとSAモジュールに異常を生じさせたら、、、
- 50. Intentional Damage to SA module SA Module SA Module SA Module SA Module SA Module SA Module SA Module SA Module SA Module SA Module
- 51. Intentional Damage to SA module SA Module SA Module SA Module SA Module SA Module SA Module SA Module SA Module SA Module SA Module
- 52. Damage of SA Module : No LBA Access SA Module SA Module SA Module SA Module SA Module SA Module SA Module SA Module SA Module SA Module Error！ Can’t Read Or Module is corrupted
- 53. Intentional Damage to SA module SA Module SA Module SA Module SA Module SA Module SA Module SA Module SA Module SA Module SA Module Error！ Can’t Read Or Module is corrupted
- 54. Damage of SA Module : No LBA Access SA Module SA Module SA Module SA Module SA Module SA Module SA Module SA Module SA Module SA Module Error！ Can’t Read Or Module is corrupted ABORT
- 55. BARUSER Let’s see what happens to HDD さあ、実際にやってみましょう
- 56. BARUSER BARUSER = BARUSU + ER
- 57. Main Concept of HiDR ( High Integrity Data Recovery ) SAモジュールは百種以上！ このサンプル事例では、 WD10EADS-22M2B0 を使用。 SAモジュール数は全部で397 種
- 58. Main Concept of HiDR ( High Integrity Data Recovery ) このサンプル事例では、 WD10EADS-22M2B0 を使用。 SAモジュール数は全部で397 種 必須かつユニークなのは7 種 7 ÷ 397 ≒ 1.76%
- 59. Main Concept of HiDR ( High Integrity Data Recovery ) Only 1.76%
- 60. Hot Swap Method ： ホットスワップ手法 通電した状態のまま、PatientにPCBを付け替えます。 通電したまま
- 61. Main Concept of HiDR ( High Integrity Data Recovery ) 未開封、ヘッド交換なしでＩＤ認 識しないＨＤＤでもデータが読め る 必要最低限のモジュールアクセス だけで済む 障害部位を確実かつ詳細に把握し 、尚且つデバイスの特徴を予め研 究調査しておくことで、より安全 かつ多くのデータを回収すること ができる。 クリーンエア環境下とはいえ、開 封時には異物が混入することは避 けられない。クリーンルームが絶 対にキレイとは限らない。 Non-Destructive Method even for HDD which doesn’t give its device ID. The least access to the magnetic disk for its booting is enough for data recovery. It is good to know the details of SA modules because the integrity of data recovery process becomes very high. Do not rely too much upon clean rooms because inside of the clean room is not always clean.
- 62. Security or Utility Hacked Cracked Good for Data leakage preventing ＶＳ Bad for Future data use
- 63. HDD customization against Future SA Damage Head Platter Head 5 Head 4 Head 3 Head 2 Head 1 Head 0 Head Map
- 64. HDD customization against Future SA Damage Head 5 Head 4 Head 3 Head 2 Head 1 Head 0 System Head Head Platter
- 65. HDD customization against Future SA Damage Head 5 Head 4 Head 3 Head 2 Head 1 Head 0 System Disk Head Platter
- 66. HDD customization against Future SA Damage SA exists only on the system disk, h0 and h1 SA Region for h2,h3,h4,h5 are empty Head Platter Head 5 Head 4 Head 3 Head 2 Head 1 Head 0
- 67. HDD customization against Future SA Damage Utilize the empty zone for SA backup ! Head Platter Head 5 Head 4 Head 3 Head 2 Head 1 Head 0
- 68. http://www.disaster-data-recovery.com/ Initial Response Guideline For Disaster Effected HDD 1. Do NOT Power ON ! 電気を入れない！ ２．Do NOT Dry before cleaning ! 洗浄前に乾燥させない！ ３．Sea Water should be removed ASAP ! 海水で腐食は待ったなし！ ガイドラインを多言語化（英語・日本語・ロシア語・中国 語）
Editor's Notes
- HDD製造時に既に検出されており、ユーザが使用することのない不良領域がある場合にはその位置情報がP-List（Primary Defect List）に記録されます。尚、P-Listに記載されたセクタは論理アドレスを有しません。
- Mod02がID&SN用
- Mod02がID&SN用
- Mod02がID&SN用