Ho Fumana Boitsebiso ba Bongaka (li-CD tsa DICOM) le Lipolokelo tsa Lelapa ho tsoa ho Li-Disc tse sa Baleheng¶

Ke liphoso tse fokolang tsa theknoloji tse sithabetsang ho feta ho tsamaea ka oncology, neurosurgery, kapa therisano ea masapo e nang le CD-R kapa DVD-R e chesitsoeng sepetlele ea MRI, CT, kapa PET scan, feela bakeng sa k'homphieutha ea ngaka hore e hatsele, e sila koloi ea eona ea optical, 'me e hlahe "Cyclic Redundancy Check (CRC) Phoso ea Lintlha," "disiki eo u e kentseng e ne e sa balehe ke komporo ena," kapa e bontša ho hloka letho ho hang. 0 Bytes disc. Masisa-pelo a tšoanang a otla malapa a hulang DVD-R ea lilemo tse 15, filimi ea lapeng ea MiniDVD ho tsoa k'hamerang, kapa ho boloka Blu-ray ka kobong 'me ba fumana hore mengoallo, kopano e sa phethoang, kapa organic dae oxidation ("disc rot") e thibela Windows Explorer le MacOS Finder ho kopitsa lifaele.

Se ke oa lahla disc, u se ke oa e hlakola ka har'a selikalikoe, 'me le ka mohla u se ke ua tlotsa sesepa sa meno sa lapeng, makhapetla a banana kapa acetone holim'a polycarbonate. Batsamaisi ba lifaele tsa sistimi e sebetsang (explorer.exe le Finder) tlosa faele eohle ea li-gigabyte tse ngata ho fetisa hang ha e otla e le 'ngoe e ke keng ea baloa 2,048-byte sector, and slim laptop USB optical drives have weak, low-power laser pickups that give up easily. By understanding how optical disc layers work, cleaning radially from hub to rim, using multi-drive pass merging with GNU ddrescue, IsoBuster, or dvdisaster, and viewing rescued medical .DCM (DICOM) slices in a standalone viewer when the bundled hospital .exe viewer crashes, you can recover 95 to 100 percent of your medical scans or family archives.

Etsa sena hona joale¶

1. Eject the disc immediately and hold it up toward a bright room light or ceiling bulb to check for "Top-Side Foil Pinholes" vs. "Bottom-Side Plastic Scratches." On a standard CD or CD-R, the fragile reflective metal and data layer sits right underneath the printed top label (only 0.01 millimeters / 0.0004 inches deep), whereas the shiny bottom side is a thick 1.2 millimeter (0.047 inch) clear polycarbonate lens. If light shines through scratches on the top label side of a CD, the reflective layer is missing at those spots and must never be scraped further; if the scratches are on the bottom shiny side, the laser is simply refracting off a plastic scuff that can be optically bypassed or polished out.
2. Stop trying to drag-and-drop folders in Windows File Explorer or macOS Finder. When File Explorer encounters a single scratched sector (2 KB) bohareng ba a 500 MB video or DICOM series, it retries the same spot 10 times, heats up the disc, hangs your computer for 5 minutes, and deletes the partial copy entirely. You must use a sector-skipping forensic imager (GNU ddrescue or IsoBuster) that copies all 99.9 percent of healthy sectors first and fills the microscopic 2 KB gap with zeros so your medical slices or videos still open.
3. Wipe the shiny bottom surface strictly in straight lines from the center hole outward to the outer edge (like the spokes of a wheel), NEVER in circular motions. Optical data tracks run in a tight concentric spiral starting from the inner hub outward. Wiping in a circle creates a long curved scratch that follows a single data track for thousands of consecutive bits, destroying the drive's Cross-Interleaved Reed-Solomon Code (CIRC) error correction. Straight radial scratches cross each track for only a few micrometers, which hardware error correction fixes automatically.
4. If a hospital Medical Imaging CD (DICOM) opens on your computer, or if only the bundled Autorun / Viewer.exe program crashes on Windows 11 or macOS, ignore the hospital's viewer program completely. Every hospital MRI, CT, and X-ray CD stores your actual raw medical images as standard .DCM files (or extensionless numbered files) inside a folder named DICOM, IMAGES, kapa EXPORT alongside a master index file named DICOMDIR. Copy that folder off the disc and open it in a free modern clinical viewer (Horos on macOS, MicroDicom or RadiAnt on Windows, or Weasis cross-platform).
5. Switch from a cheap slim USB laptop drive to a full-size 5.25-inch desktop SATA optical drive (or test across 2 to 3 different brand drives). Slim portable USB DVD drives use miniature plastic lenses and single-wavelength compromise lasers. A full-size desktop drive (LG, Pioneer, ASUS, Plextor) has stronger tracking servos, better laser focus adjustment, and completely different firmware error-recovery algorithms, often reading a "dead" disc on the first try.
6. If the disc is a Hospital DICOM CD needed for surgery today and the disc itself is physically cracked or unmounted by every drive, call the imaging center's Film Library / Radiology Medical Records department immediately and ask for an electronic PowerShare / Ambra / LifeImage / Patient Portal cloud link. Almost every modern hospital PACS (Picture Archiving and Communication System) can push your original DICOM study electronically to your surgeon's hospital in 10 minutes without needing the physical CD at all.

flowchart TD
    A["Unreadable CD, DVD, Blu-ray, or Hospital DICOM Disc"] --> B{"Is the disc physically cracked from the center hub?"}
    B -->|"Yes: Structural radial crack"| C["DO NOT insert into any drive: High-speed spin (10,000 RPM) will shatter the disc inside the drive"]
    B -->|"No: Intact polycarbonate disc"| D["Inspect against light + Clean radially (center to outer edge) with mild soap, water, and microfiber"]
    D --> E{"Is this a Hospital Medical Scan (MRI / CT / X-Ray DICOM CD)?"}
    E -->|"Yes: Hospital DICOM CD"| F{"Na disk e hola ka har'a drive, kapa ke Viewer.exe feela e hlolehang?"}
    F -->|"Disc mounts, empa Viewer.exe e hloleha kapa o ho Mac"| G["Bypass Viewer.exe: Bula faele ea 'DICOMDIR' kapa foldara ea 'DICOM/' ka kotloloho ho Weasis, Horos (Mac), kapa MicroDicom (Windows)"]
    F -->|"Diski e ke ke ea hloella kapa ea hloleha bohareng ba kopi ka Phoso ea CRC"| H["Likarolo tse tala tsa litšoantšo tse sebelisang GNU ddrescue (-b 2048) kapa IsoBuster ho 1 ho isa ho 3 optical drives"]
    E -->|"No: DVD ea Lelapa, Camcorder MiniDVD, Photo CD, kapa Blu-ray"| H
    H --> I["Hloa kapa u ntše setšoantšo sa .iso se pholositsoeng ka IsoBuster / 7-Zip / VLC / dvdisaster"]

Matrix ea ho hlahloba: ho utloisisa optical disc anatomy le mekhoa ea ho hlōleha¶

Ha se li-disc tsohle tsa optical tse hahiloeng ka tsela e tšoanang. Pele u leka ho hloekisa 'mele kapa ho bentša, tseba hore na u tšoere CD, DVD, kapa Blu-ray (BD), hobane botebo ba data ea bona le ho ba kotsing ea ho belisoa ha bokaholimo li fapane ka ho felletseng:

Phase 1: Rescuing Hospital Medical Imaging CDs (DICOM MRI, CT, PET, & X-Ray Discs)¶

Patients are routinely handed a CD-R or DVD-R after an MRI, CT scan, ultrasound, or mammogram and told to bring it to their specialist appointment. When you put that hospital disc into your home laptop or the doctor's office PC, three distinct problems happen, and two of them have nothing to do with a damaged disc:

Problem 1: You Inserted a Hospital CD into an Apple Mac (or Windows 11 PC), and the Viewer Program Won't Open¶

95 percent of hospital CD-burners (Codonics, Rimage, Epson PP-100, PacsGear) burn a tiny 32-bit Windows viewer program (Viewer.exe, eFilmLite.exe, Carestream.exe, Sectra.exe, kapa Philips iSite) onto the root of the disc. * On macOS: Macs cannot run Windows .exe files, so double-clicking Start.exe kapa Autorun.inf does nothing or opens a text file. * Ho Windows 11: Bashebelli ba bangata ba li-CD tsa sepetlele ba khale ba tšepile lefa la 32-bit likarolo tsa Java, ActiveX, kapa DirectX 9 tse senyehang hang-hang mekhoeng ea sejoale-joale ea Windows 11.

The 60-Second Clinical Fix: Bula Raw DICOMDIR / .DCM Lifaele ho sebono sa mahala sa Native DICOM¶

Sekena sa hau sa bongaka se not se notletsoe ka har'a se robehileng .exe lenaneo. Ka molao oa machaba oa bongaka le NEMA PS3 / ISO 12052 DICOM Standard, CD e 'ngoe le e 'ngoe ea sepetlele e boloka lilae tsa hau tsa bongaka tse sa lahleheng, tse nang le qeto e felletseng ea 16-bit ka har'a foldara e tloaelehileng ho disc: 1. Bula CD/DVD ho Windows File Explorer kapa macOS Finder ebe u batla faele e bitsoang DICOMDIR kapa foldara e bitsoang DICOM, IMAGES, DCM, kapa EXPORT. 2. Kopitsa foldara eo kaofela (le faele ea DICOMDIR file) ho tlosa CD e liehang ho ea foldareng e ncha komporong ea komporo ea hau (-/Desktop/My_MRI_Scan/). 3. Khoasolla 'me u bule e' ngoe ea lishebelli tsena tse tšepahalang, tsa mahala tsa DICOM 'me u hule u li tlohele DICOM foldareng ka fensetere: * Cross-Platform (Windows, macOS, Linux): Weasis Medical Viewer (sebohi sa kliniki sa mahala, se bulehileng se sebelisoang ke lipetlele lefatšeng ka bophara; e tšehetsa kaho e ncha ea 3D MPR le papiso ya letoto ka mathoko). * ** macOS Feela: ** ** Horos ** kapa ** OsiriX Lite ** (litsi tsa matsoalloa tsa macOS radiological). * Windows Feela: MicroDicom kapa RadiAnt DICOM Viewer (e bobebe, e nkehang, e bula CD efe kapa efe ea sepetlele ka metsotsoana e 2 mme e u lumella ho romela lilae tse ikhethileng joalo ka JPEG/MP4 ha ho hlokahala ha u ntse u boloka tse tala. .DCM foldara bakeng sa ngaka ea hau).

Bothata ba 2: CD ea Sepetlele e ea bontša 0 Bytes ("Blank Disc") kapa E Kopa ho E Format¶

Ke hobane'ng ha CD ea sepetlele e neng e chesitsoe ka ho hlaka (o ka bona selikalikoe se lefifi se tukang ka holim'a bokaholimo bo benyang) e hlaha e le CD e se nang letho khomphuteng ea hau? * Sesosa: Secheso sa disc sa setsebi sa radiology se sebelisitse UDF Packet Writing kapa se ile sa ts'oaroa ke "buffer" qetellong ea ho cha mme ha a so ka a ngola Lethathamo la Lead-Out / Session Table of Contents.TOC). Hobane Windows le macOS li batla feela sesupo se phethiloeng sa ISO-9660 / Joliet / UDF, ba nahana hore disc ha e na letho. * ** Lokisa:** Bula disk ka hare ho IsoBuster (Windows, e lokolohile ho e hlahloba le e etselitsoeng ka ho khetheha ho kenya linako tse sa phethoang tsa bongaka le camcorder optical sessions). IsoBuster e iphapanyetsa Lead-Out TOC e sieo, e lekola Track 01 e tala ea optical, e fumana DICOMDIR le .DCM lifaele, ebe o li ntša ka mokhoa o hloekileng ho hard drive ea hau.

Bothata ba 3: Ho Hlahisa Leru le nkehang kapa Kopi ea USB bakeng sa Ngaka ea Hao ea Opereishene Pele Ho Thoeoa¶

Le ka mohla u se ke ua kena lipuisanong tsa nako ea bohlokoa tsa ho buoa kapa tsa oncology u nkile feela polasetiki e sa lekoang ea CD-R letsohong la eona la pampiri. Likhomphutha tse ngata tsa sejoale-joale tsa tlhahlobo ea tleliniki tsa bareki ha li sa na li-CD/DVD tse hahelletsoeng ho hang: 1. Kenya CD ea sepetlele lapeng letsatsi pele ho kopano ea hau 'me u kopitse buka eohle ea motso oa CD (ho kenyeletsoa DICOMDIR, the DICOM/ foldareng, le foldara ea seshebelli ea sepetlele) ho fomati e ncha e hlophisitsoeng ** FAT32 / exFAT USB flash drive**. 2. Verify that the .DCM litšoantšo li buloa ka mokhoa o hloekileng ho Weasis kapa MicroDicom, 'me u tlise CD ea mantlha ea sepetlele le USB flash drive ea hau e hlahlobiloeng.

Mokhahlelo oa 2: Ho hloekisa 'mele ka mokhoa o sireletsehileng le ho lokisa sekoapo sa mahlo (Se Sebetsang Khahlanong le Se Senyang Li-Disk)¶

Haeba CD kapa DVD ea hau e hloleha ka ** Bala Liphoso / CRC Errors** because of fingerprints, haze, or bottom-surface scratches, clean and treat the polycarbonate lens layer in three escalating stages:

Mothati oa 1: Metsi a Mofuthu a Sesepa + Hlakola ea Radial Microfiber (E lokisa 60% ea Li-Disc tse sa Baleng)¶

Le ka mohla u se ke ua hlakola disc e omeletseng, e lerōle ka thaole ea pampiri kapa t-shirt (lithaole tsa pampiri tsa lehong le polycarbonate e omeletseng ea k'hothone). 1. Hold the disc by its outer rim and center hole under lukewarm running tap water to rinse off abrasive dust particles. 2. Kenya lerotholi le le leng la sesepa sa metsi se bonolo (Dawn / Fairy) on your wet fingertip and gently rub in straight radial lines from the center hole out to the edge. 3. Rinse thoroughly with clean water (or distilled water if your tap water is hard) and pat dry, never rub in circles, using a clean, plush microfiber eyeglasses cloth. 4. For sticky adhesive residue or greasy smudges on the bottom shiny side (never on a printed ink label), dampen the microfiber cloth with Isopropyl Alcohol (70% to 91% IPA) and wipe radially from center to rim.

Mothati oa 2: Leqheka la "Wet-Refraction Index Match" bakeng sa ho Bala ha Tšohanyetso Nako e 'Ngoe¶

Ke hobane'ng ha mongoapo holim'a polasetiki e hlakileng e ka tlase e thibela laser ho bala likoti tsa tšepe 1.2 millimeters (0.047 inches) ka tlas'a eona? Hobane mokhoa o nang le sebopeho sa V ho polycarbonate (Refractive Index n = 1.585) e tletse moea (Refractive Index n = 1.000), e kobehang le ho hasanya lebone la laser la infrared/red joalo ka prism kahoo e fosa sekoti. * Teko ea Nako ea Nako ea ho Tlatsa ea Optical Non-Abrasive Optical: Pele u sebelisa lehlabathe le hlabang holim'a disk e ke keng ea nkeloa sebaka, sebelisa filimi e tšesaane ea pure automotive carnauba wax (Pledge / likhalase tsa mahlo tsa polasetiki tse khoahlapisang filler) kapa oli ea liminerale / jeli ea peterole e hlakotsoe ho ea ho sheen e sa bonahaleng ea mahlo ka bophara, e tlosa karolo ea 99.9 lekholong ea lesela la microfiber e le hore bokaholimo bo omelle ka botlalo 'me ha bo khone ho akhela masalla holim'a lense ea koloi. Ho tlatsa microscopic V-groove ka "polycarbonate's refractive index's refractive index" e lumellang laser hore e thunye ka kotloloho nakong eo ddrescue pase ea litšoantšo.

Mothati oa 3: Mekhoro e Metsi ea Micro-Polishing Deep Polycarbonate (li-CD & li-DVD FEELA, Ha ho mohla Blu-ray)¶

Haeba CD kapa DVD e na le sekoti se tebileng se ntseng se baka liphoso tsa ho bala, u se ke ua** sebelisa sesepa sa meno sa gritty house baking soda (e nang le likristale tse mahoashe tsa silica tse senyang moholi o sa feleng). Ho e-na le hoo: 1. Sebelisa poletiki ea polasetiki e nyane ea micron e etselitsoeng acrylic/polycarbonate optical (Novus #2 Fine Scratch Remover, Meguiar's PlastX, kapa koloi 3000-grit motsoako oa motsutsuoa). 2. Kenya lerotholi la boholo ba erekisi holim'a letlapa le mongobo la microfiber 'me u bepolishe ka ho khetheha ka li-radial strokes tse khutšoane (bohareng ho isa bohareng) holim'a karolo e ngoliloeng bakeng sa metsotsoana e 60 ho fihlela groove e lefifi e kopanngoa hantle le polycarbonate e potolohileng. 3. Hlatsoa masala ohle ka metsi a futhumetseng le sesepa sa sejana, o omelle ka ho feletseng, 'me hang-hang u tšoantše disc ka eona ddrescue.

Mokhahlelo oa 3: Lits'oants'o tsa lefapha la liphase tse ngata tsa Forensic le GNU ddrescue, dvdisaster, le Multi-Drive Kopanyo¶

Ha optical disc e na le mengoapo ea 'mele, ho bola ha dae, kapa likarolo tse fokolang, o tlameha ho etsa setšoantšo sa e tala. 2,048-byte optical sectors hore e be 'ngoe .iso faele ho hard drive ea hau. Ke ka lebaka lena GNU ddrescue le dvdisaster sebetsa ka katleho ho li-CD le li-DVD tse seng li ngoletsoe:

1. Lekunutu la ho Kopanya ha Multi-Drive (Kamoo Li-Drives tse 3 tse Theko e tlaase li otlang koloi e 1 e theko e boima)¶

Moetso o mong le o mong oa optical drive o na le laser diode angle e fapaneng hanyane, sebaka sa lense sa linomoro, taolo ea othomathiki ea ho fumana.AGC), le hardware Reed-Solomon (CIRC / RS-PC) sesebelisoa sa ho lokisa liphoso: * Drive A (mohlala, LG Desktop SATA DVD Burner) e ka bala karolo ea 98.4 lekholong ea DVD ea hau ea lenyalo e seng e sa sebetse, e hlōleha likarolong tse 400 tse haufi le rim e ka ntle. * Drive B (mohlala, Pioneer Blu-ray Drive kapa ASUS Laptop Drive ea khale) e ka hloleha ho makaleng a 300 a fapaneng haufi le sebaka se ka hare, ha u ntse u bala ntle le matla a 390 ho a 400 ao Drive A e ammeng. * Hobane ddrescue e latela e mong le e mong 2,048-byte lefapha la eona .map file, o ka tsamaisa Pass 1 ho Drive A, o ntša disc, kenya disc ho Drive B, 'me u supe ddrescue ka ho ** hantle feela rescue.iso le rescue.map lifaele **. ddrescue e tla feela kopa Drive B ho bala likarolo tse 400 tse sieo, ho kopanya matla a li-laseser tse ngata tsa 'mele ho etsa liperesente tse 100 tse felletseng. .iso setšoantšo.

2. Ehlile ddrescue Litaelo tsa li-CD, li-DVD le li-Blu-ray Discs (Linux & macOS)¶

# STEP 1: Prevent the operating system from mounting or spinning the scratched disc automatically,
# and set the optical drive sector size explicitly to 2048 bytes (-b 2048 is mandatory for CD/DVD/BD):

# Optional: Throttle optical drive spin speed to 4x or 8x so the laser servo can track warped/scratched pits cleanly:
eject -x 8 /dev/sr0

# STEP 2: Pass 1 (Fast Non-Scraping Sweep) - Grab 95%+ of healthy sectors quickly without hanging on scratched tracks:
#   -b 2048 : Optical disc hardware sector size (2 KB per sector)
#   -n      : Do NOT waste time splitting or retrying bad sectors on Pass 1 (prevents laser overheating)
sudo ddrescue -b 2048 -n /dev/sr0 ~/Desktop/disc_rescue.iso ~/Desktop/disc_rescue.map

# STEP 3: Pass 2 (Direct Unbuffered Hardware Scraping + Reverse Direction)
#   -d      : Direct disc access (bypasses Linux kernel page-cache read-ahead, reading single 2048-byte sectors)
#   -r 3    : Retry stubborn scratched sectors up to 3 times
#   -R      : Read in REVERSE from the outer edge inward (approaches radial scratches from the opposite servo side)
sudo ddrescue -b 2048 -d -r 3 -R /dev/sr0 ~/Desktop/disc_rescue.iso ~/Desktop/disc_rescue.map

# STEP 4: Multi-Drive Merge (If you have a second USB or SATA DVD/Blu-ray drive attached as /dev/sr1):
# Move the disc to the second drive and run the exact same command pointing to the SAME .iso and .map files:
sudo ddrescue -b 2048 -d -r 3 /dev/sr1 ~/Desktop/disc_rescue.iso ~/Desktop/disc_rescue.map

3. Lisebelisoa tse ling tsa Graphical Optical Recovery bakeng sa Windows (dvdisaster & IsoBuster)¶

Haeba o ho Windows mme o sa khone ho sebelisa Linux ddrescue: * dvdisaster (Mahala, Mohloli o Bulehileng bakeng sa Windows/Linux/macOS): Le ha o so ka oa theha .ecc faele esale pele, dvdisaster's Adaptive Read / Linear Read scanner e bala litaba tse senyehileng tsa CD/DVD/BD boemong ba pakete e tala ea SCSI/MMC, e bonts'a sebopeho sa radara e phelang ea likarolo tse tala (tse phetseng hantle), tse mosehla (tse liehang), le tse khubelu (tse sa baleheng) ho disc, 'me e tšehetsa ho phethoa ha litšoantšo tsa li-drive tse ngata joalo ka ddrescue. * IsoBuster (Windows): Sesebelisoa sa maemo a holimo sa indasteri sa optical forensics bakeng sa Sony/Panasonic/Canon e sa phethoang. 8 cm (3.1 in) MiniDVD camcorder discs, multi-session photo CDs, Mavica floppy/CDs, le lifate tse senyehileng tsa UDF/ISO.

Mokhahlelo oa 4: Ho ntša livideo tse bapaloang le litšoantšo tsa DICOM ho tsoa ho tse hlaphohetsoeng hanyane .iso¶

Ho thoe'ng haeba disc ea hau e ne e e-na le pinhole e sa feleng ka foil, ho joalo ddrescue e fumane ** karolo ea 99.92 lekholong ** ea disc ha e ntse e siea likarolo tse 50 tse sa baleheng li tletse zero ka hare disc_rescue.iso? * Hobaneng hoo .iso e ntse e le tlhōlo: Ha u ne u leka ho kopitsa disk ho Windows Explorer pejana, u fumane 0 peresente ea lifaele tsa hau hobane Explorer e ile ea ntša karolo ea pele e mpe. Hare disc_rescue.iso, ddrescue e ile ea nkela likarolo tseo tse 50 tse sa baleheng sebaka ka tse se nang kotsi 0x00 li-byte ha u ntse u boloka li-gigabyte tsohle tse setseng. * ** Mokhoa oa ho ntša lifaele tsa hau ho disc_rescue.iso:** 1. Bakeng sa li-DVD tsa Lelapa (VIDEO_TS / VTS_01_1.VOB): Thaba disc_rescue.iso (kapa e bule ka ho toba ka hare ho 7-Zip, MakeMKV, HandBrake, kapa VLC Media Player). Hobane MPEG-2 .VOB melapo ea video e tletse ka lihlooho tsa ho lumellana hape ka metsotsoana e meng le e meng e seng mekae, lekhalo la 10 KB le tlatsitsoeng ka zero le baka bokhuts'oane. 0.2-second Pixel glitch ha u ntse u bapala lechato la hao la lihora tse 2 kapa video ea bongoana e bapala ka molumo le video e hlakileng. 2. Bakeng sa li-CD tsa DICOM tsa Sepetlele: Bula disc_rescue.iso ka 7-Zip (Right-click -> 7-Zip -> Open archive) kapa o e kenye, kopitsa kaofela .DCM lifaele, 'me u kenye foldara ho Weasis, Horos, kapa MicroDicom. Kaha thuto ea MRI kapa CT ea 300-slice e boloka selae se seng le se seng sa sefapano e le se ikemetseng se ikemetseng. .DCM faele (100 KB ho 2 MB e 'ngoe le e' ngoe), karolo e mpe ho CD e ama feela selae se le seng sa 1 ho tse 300, se siea lilae tse ling tse 299 liperesente tse 100 tsa tlhahlobo.

Lethathamo la Thibelo: ho fallisa lelapa la hau le li-disc tsa bongaka tsa bongaka pele dae e bola¶

Li-CD-R le li-DVD-R tse rekoang tse entsoeng ka lidae tsa tlhaho (cyanine, phthalocyanine, le azo) li na le bophelo ba lik'hemik'hale tsa lefats'e tsa 10 ho isa ho lilemo tse 25 pele khanya ea UV, mongobo le oksijene ea sepakapaka e senya phapang ea dae ("disc rot"):

• **Hang-hang hahola lelapa le leng le le leng DVD-R, camcorder MiniDVD, le CD ea lenyalo ho .iso kapa e hlokang tahlehelo .mkv file ** ebe u li boloka ho sistimi ea 3-2-1 (bona Li-backups tsa khomphutha: leano la 3-2-1 le ho hlaphoheloa ha koluoa).
• Kopitsa CD ea DICOM ea sepetlele komporong ea hau le polokelo ea maru e patiloeng ka letsatsi leo u e fumanang ka lona: Boloka litaba tsohle tse tala tsa CD (ho kenyeletsoa le DICOM/ foldara le DICOMDIR index) e kentsoeng ka har'a foldareng e ngotsoeng ka letsatsi, mokhoa (MRI Lumbar Spine), le lebitso la sepetlele kahoo ha ho mohla u tla tlameha ho itšetleha ka CD ea polasetiki ea 'mele lilemo hamorao.
• Haeba o tlameha ho boloka data ho li-optical discs bakeng sa polokelo e batang ea lilemo tse 50+, sebelisa feela Inorganic M-DISC (Millenniata Blu-ray / DVD) mme e hlahisa 20% dvdisaster Lehlaka-Solomone .ecc parity file: Ho fapana le li-organic dae discs tse felang, M-DISC e kenya likoting tsa 'mele ka har'a khalase ea carbon/metal-oxide layer e ke keng ea bola, le ho boloka dvdisaster .ecc parity faele e u lumella ho etsa lipalo bocha liperesente tse 100 tsa disc le haeba likarolo tse likete li ka ngolisoa hamorao.

Lipotso tse botsoang khafetsa¶

Na "Toothpaste Trick" kapa "Banana Peel Trick" ehlile e lokisa li-CD le li-DVD tse seng li hahiloe?¶

Che; ho sebelisa sesepa sa meno sa ntlo kapa lijo ka disc optical ke e 'ngoe ea litšōmo tse senyang ka ho fetisisa tsa inthanete. Bongata ba bosoeu ba sejoale-joale bosoeu le litlolo tsa meno tsa gel li na le hydrated silica kapa calcium carbonate particles tse mahoashe haholo 'me li sa lekana bakeng sa polycarbonate ea optical, tse hoholang limilione tsa li-grooves tse bosootho tse bosootho ho disc tse hasanyang lesela le lebe ho feta mongoapo oa pele. Haeba CD kapa DVD e na le mongoapo o tebileng oa polasetiki o ka tlase o ke keng oa lokisoa ke metsi a futhumetseng a sesepa, sebelisa feela "sub-micron optical acrylic/polycarbonate polish" (joalo ka Novus #2 kapa Meguiar's PlastX) e tlotsoeng ka mela e otlolohileng ho tloha bohareng ho ea moqomong o kantle, 'me le ka mohla u se ke ua bentša disc ea Blu-ray ho hang.

Hobaneng ha camcorder ea ka ea khale ea MiniDVD (e nyane ea 8 cm / 3.1 inch disc) e hlaha e se na letho (0 Bytes) ha ke e kenya khomphuteng ea ka?¶

Lik'hamera tsa DVD (Sony Handycam, Canon, Panasonic, Hitachi) le lirekoto tsa DVD tsa kamore ea ho phomola tse ikemetseng li ngotse video ho li-DVD-R/RW disc ka nako ea nnete ntle le ho ngola tafole e tloaelehileng ea PC ISO-9660 faele ho fihlela mosebelisi a tsamaisa taelo ea **"Finalize Disc"** ka har'a menu ea camcorder. Haeba camcorder e ne e lahlehile kapa e robehile pele disk e phethoa, Windows le macOS li ke ke tsa bona Lethathamo la Tse ka Hare ebe li tlaleha hore disc e se na letho. Lifilimi tsa lapeng li ntse li le teng ka liperesente tse 100 ho disc: bula feela MiniDVD e sa phethoang ka hare **IsoBuster** ka har'a komporo ea li-DVD e kenyang terei (le ka mohla u se ke ua kenya MiniDVD e nyane ka har'a MacBook kapa koloi ea koloi, moo e tla ts'oareha) ho skena lipina tse tala le ho ntša. `.VOB` / `.MPG` melapo ea video.

Nka sheba CD ea ka ea sepetlele ea MRI kapa CT scan ho Apple MacBook ha CD e na le Windows feela Viewer.exe faele ho eona?¶

Li-discs tsa litšoantšo tsa sepetlele li kenyelletsa Windows e sa tloaelehang `.exe` lenaneo feela joalo ka boiketlo, ha litšoantšo tsa 'nete tsa bongaka li lutse foldareng e tloaelehileng e bitsoang `DICOM` kapa `IMAGES` ka disc e tšoanang. Hokela koloi ea DVD ea kantle ea USB ho Mac ea hau, bula CD ho Finder, hula kaofela `DICOM` foldara (le `DICOMDIR` file) ho Mac Desktop ea hau, 'me u e bule u sebelisa **Weasis** ea mahala kapa **Horos** sebali sa bongaka sa macOS. Mananeo ana ka bobeli a balile metadata ea DICOM ea sepetlele 'me e u tlohella hore u tsamaee hantle ho pholletsa le selae se seng le se seng sa axial, sagittal, le coronal MRI/CT.

A na nka fumana CD haeba foil e benyang ea silevera/khauta e lehlakoreng la laibole e ka holimo e kangoa 'me ke bona khanya e phatsimang ho eona?¶

Ho fapana le mengoapo e holim'a polasetiki e tlase (e ka bentšoang kapa ea tlatsoa ka mahlo hobane laser e phunyeletsa ka har'a limilimithara tse 1.2 tsa polasetiki e hlakileng pele e otla lera la data), mongoapo o lehlakoreng le ka holimo la leibole la CD o hohola aluminium e nyane kapa e phatsimang ea khauta le lintlha tse hatisitsoeng lia ipata. Ha o khone ho bentša kapa ho penta mekoti e sieo ea foil. Leha ho le joalo, tsohle ha lia lahleha: hang-hang khaotsa ho tšoara bokaholimo bo ka holimo ebe u matha **GNU `ddrescue` (`-b 2048 -n`)** ho disc. `ddrescue` e tla pholosa faele e 'ngoe le e' ngoe e setseng le lekala le haufi le sekoti, e leng se u lumellang hore u boloke liperesente tse 95 ho isa ho tse 99 tsa linepe, litokomane kapa lilae tsa DICOM ho disc kaofela.

Litataiso tse amanang¶

• Ho hloleha ha hard drive le ho hlaphoheloa ha data
• Ho hlakolwa ha faele ka phoso, drive e hlophisitsoeng, le ho hlaphoheloa ha lifoto
• Karete ea SD e senyehileng, mecha ea phatlalatso ea khamera e sa baleheng, le ho hlaphoheloa ha lifoto tsa RAW
• Sehokelo sa USB flash drive se kentsoeng le pholoso ea data
• Li-backups tsa khomphutha: leano la 3-2-1 le ho hlaphoheloa ha koluoa
• Linomoro tsa maemo a tšohanyetso lefatšeng ka bophara

Mehloli e hlahlobiloe¶

• Mokhatlo oa Sechaba oa Baetsi ba Motlakase (NEMA) & ISO (Machabeng): DICOM Standard PS3.10 le PS3.12 (Mecha ea polokelo ea Mecha le Sebopeho sa Faele bakeng sa Bongaka .DCM Lintlha le DICOMDIR Mehaho ea Directory ho Optical Media).
• Lekhotla la Lisebelisuoa tsa Laeborari le Boitsebiso (CLIR) & Library of Congress (United States): Tlhokomelo le Tšoaro ea li-CD le li-DVD: Tataiso bakeng sa Librarians and Archivists (Ka Fred R. Byers, NIST / CLIR Publication 121).
• Canadian Conservation Institute (CCI) (Canada): Conservation Note 19/1 (Bolelele ba Li-CD tse Rekoang, li-DVD, le Blu-ray Discs, le Optical Media Disaster Recovery).
• GNU Project / Free Software Foundation (Machabeng): GNU ddrescue Buka ea Optical Media Recovery (2048-byte Mokhoa o otlolohileng oa ho fihlella le ho kopanya limmapa tse ngata tsa drive drive.
• Ecma International / ISO/IEC (International): ECMA-130 ("Yellow Book" CD-ROM CIRC Reed-Solomon Error Correction), ECMA-267 (DVD-ROM Specification), le dvdisaster Tekheniki Documentation.