Create a CD/DVD ISO image from disk.

dd bs=1M if=/dev/scd0 of=./filename.iso OR readom -v dev='D:' f='./filename.iso' speed=2 retries=8
This example is taken from Cygwin running on Win7Ent-64. Device names will vary by platform. Both commands resulted in identical files per the output of md5sum, and ran in the same time down to the second (2m45s), less than 100ms apart. I timed the commands with 'time', which added before 'dd' or 'readom' gives execution times after the command completes. See 'man time' for more info...it can be found on any Unix or Linux newer than 1973. Yeah, that means everywhere. readom is supposed to guarantee good reads, and does support flags for bypassing bad blocks where dd will either fail or hang. readom's verbosity gave more interesting output than dd. On Cygwin, my attempt with 'readom' from the first answer actually ended up reading my hard drive. Both attempts got to 5GB before I killed them, seeing as that is past any CD or standard DVD. dd: 'bs=1M' says "read 1MB into RAM from source, then write that 1MB to output. I also tested 10MB, which shaved the time down to 2m42s. 'if=/dev/scd0' selects Cygwin's representation of the first CD-ROM drive. 'of=./filename.iso' simply means "create filename.iso in the current directory." readom: '-v' says "be a little noisy (verbose)." The man page implies more verbosity with more 'v's, e.g. -vvv. dev='D:' in Cygwin explicitly specifies the D-drive. I tried other entries, like '/dev/scd0' and '2,0', but both read from my hard drive instead of the CD-ROM. I imagine my LUN-foo (2,0) was off for my system, but on Cygwin 'D:' sort of "cut to the chase" and did the job. f='./filename.iso' specifies the output file. speed=2 simply sets the speed at which the CD is read. I also tried 4, which ran the exact same 2m45s. retries=8 simply means try reading a block up to 8 times before giving up. This is useful for damaged media (scratches, glue lines, etc.), allowing you to automatically "get everything that can be copied" so you at least have most of the data.
Sample Output
sharkins@L7EIS-TEL023 /cygdrive/c/Zip/HP/USB HD 720p Business Webcam
$ time readom -v dev='D:' f='./HP-HD-2200_ViaReadom-Take3.iso' speed=2 retries=8
scsidev: 'D:'
devname: 'D'
scsibus: -1 target: -1 lun: -1
Read  speed:  1764 kB/s (CD  10x, DVD  1x).
Write speed:     0 kB/s (CD   0x, DVD  0x).
Capacity: 59379 Blocks = 118758 kBytes = 115 MBytes = 121 prMB
Sectorsize: 2048 Bytes
Copy from SCSI (2,0,0) disk to file './HP-HD-2200_ViaReadom-Take3.iso'
end:     59379
addr:    59379 cnt: 14
Time total: 165.562sec
Read 118758.00 kB at 717.3 kB/sec.

real    2m45.742s
user    0m0.062s
sys     0m0.420s


sharkins@L7EIS-TEL023 /cygdrive/c/Zip/HP/USB HD 720p Business Webcam
$ time dd bs=1M if=/dev/scd0 of=./HP-HD-2200_Via_dd.iso
115+1 records in
115+1 records out
121608192 bytes (122 MB) copied, 165.575 s, 734 kB/s

real    2m45.665s
user    0m0.015s
sys     0m0.062s


sharkins@L7EIS-TEL023 /cygdrive/c/Zip/HP/USB HD 720p Business Webcam
$ md5sum *
f42303c3b030a0e528c3d28bb80683a9 *HP-HD-2200_Via_dd.iso
f42303c3b030a0e528c3d28bb80683a9 *HP-HD-2200_ViaReadom-Take3.iso

-1
2013-10-23 15:53:27

5 Alternatives + Submit Alt

What Others Think

Amazing! This blog looks just like my old one! It's on a completely different subject but it has pretty much the same layout and design. Wonderful choice of colors! Pug Puppies for Sale Near Me PUG PUPPY FOR SALE NEAR ME PUG PUPPIES FOR SALE pug puppies for sale in kentucky Pug Puppies for Sale Under $500 Near Me pug puppies for sale in texas
rahimhh21 · 86 weeks and 4 days ago
Pug Puppies for Sale Near Me pugs puppies for sale teacup pugs for sale pug puppies for sale by owner pug puppies ohio PUG PUPPY FOR SALE NEAR ME PUG PUPPIES FOR SALE pug puppies for sale in kentucky Pug Puppies for Sale Under $500 Near Me pug puppies for sale in texas pug puppies for sale $200 pugs for sale near me under $500 pugs for sale under $400 near me pugs for sale near me puppies for sale near me under $500 pug puppies for sale under $1,000 near me pug for sale pug puppies for sale under $300 Brindle Pug Pitbull Pug Mix Pugs for sale cheap Cheap pug affordable pug puppies for sale near me black pugs for sale near me White Pugs for sale pug dog for sale free pug puppies pug puppies for sale in my area mn pug breeders pug puppies indiana pugs for sale michigan PUG PUPPY ADOPTION Pug puppies for sale Pug puppies for sale near me Pug puppies near me Pug Puppies for Sale Under $500 Near Me Cute Pug Puppies Black pug puppies Black pug puppies for sale pug puppies for adoption black pug puppies for sale near me chihuahua pug mix puppies how much is a pug puppy teacup pug puppies baby pug puppies baby pug puppies for sale pictures of pug puppies pug puppies for sale in Ohio pug puppies price pug mix puppies teacup pug puppies for sale best food for pug puppy newborn pug puppies pug puppies craigslist pug puppies for sale craigslist adorable pug puppies how much does a pug puppy cost Pitbull pug mix puppies pug pit mix puppy pug puppies for sale $200 pug puppies for sale in NJ Pug puppies for sale in Wisconsin pug puppy cost pug puppy food royal canin pug puppy royal canin pug puppy food fawn pug puppy pug puppies for sale florida pug puppies for sale in Indiana pug puppies for sale in KY pug puppies for sale in NC pug dog puppy AKC Registered Pug Puppies For sale cheap pug puppies for sale near me cheap pug puppies for sale in California cheap pug puppies for sale in nj Black Pug Puppies for sale pugs puppies for sale
Perfecthomepugs · 77 weeks and 3 days ago
SENSA838 selaku situs agen slot online terbaik no 1 di Indonesia akan selalu menyediakan layanan yang terbaik dan bisa memuaskan para member setia kami. Diantara nya seperti memberikan informasi mengenai daftar provider slot gacor dan terpopuler saat ini. SENSA838 Bukan hanya sekedar memberikan statement sebagai situs tergacor 2022 saat ini, kami membuktikan dengan memberikan jaminan garansi gacor 100% atau biasa di sebut garansi kekalahan 100%. Yang di mana apabila member baru deposit dan mengalami kekalahan pertamanya maka member berhak mengklaim garansi kekalahan 100% sesuai dengan syarat dan ketentuan yang berlaku. Menarik kan ? Main slot kalah dan bisa klaim kembali saldo nya. Promo ini hanya berlaku untuk member yang baru melakukan deposit untuk pertama kali nya. Cara klaim nya juga sangat mudah sekali. Member hanya perlu melapor ke CS Livechat SENSA838 yang bertugas 24 jam dimana fitur klaim garansi nya terdapat di bagian pojok kanan bawah di halaman situs kami.
loanabilly · 62 weeks and 5 days ago
We are overjoyed to announce that our healthy litter of the prettiest Pug puppies has arrived. These delightfully funky packages need five-star homes. Puppies who are reared at home and have great socialisation are used to hearing youngsters playing and other people's voices. Puppies get regular deworming, vaccines, veterinary exams, and microchipping. Puppies are now ready to move on to their new homes for all time. Learn More here: PUG PUPPY ADOPTION Pug puppies for sale PUG PUPPIES FOR SALE NEAR ME PUG PUPPIES NEAR ME PUG PUPPIES FOR SALE UNDER 500 NEAR ME CUTE PUG PUPPIES BLACK PUG PUPPIES BLACK PUG PUPPIES FOR SALE PUG PUPPIES FOR ADOPTION BLACK PUG PUPPIES FOR SALE NEAR ME CHIHUAHUA PUG MIX PUPPIES TEACUP PUG PUPPIES HOW MUCH IS A PUG PUPPY BABY PUG PUPPIES PICTURES OF PUG PUPPIES PUG PUPPIES FOR SALE IN OHIO PUG PUPPIES FOR SALE IN PA PUG PUPPIES PRICE PUG MIX PUPPIES TEACUP PUG PUPPIES FOR SALE BABY PUG PUPPIES FOR SALE BEST FOOD FOR PUG PUPPY NEWBORN PUG PUPPIES PUG PUPPIES CRAIGSLIST PUG PUPPIES FOR SALE CRAIGSLIST WHITE PUG PUPPIES PUG PUPPIES FOR SALE IN MICHIGAN PUG PUPPIES FOR SALE UNDER 500 ADORABLE PUG PUPPIES BRINDLE PUG PUPPY HOW MUCH DOES A PUG PUPPY COST PITBULL PUG MIX PUPPIES PUGS FOR SALE NEAR ME PUG PUPPIES FOR SALE 200 PUG PUPPIES FOR SALE IN NJ PUG PUPPIES FOR SALE IN WISCONSIN PUG PUPPIES MICHIGAN PUG PUPPY COST MERLE PUG PUPPY FOR ADOPTION BEST PUG PUPPY FOOD ROYAL CANIN PUG PUPPY FOOD FAWN PUG PUPPY PUG PUPPIES FOR SALE FLORIDA PUG PUPPIES FOR SALE IN INDIANA PUG PUPPIES FOR SALE IN KY PUG PUPPIES FOR SALE IN NC PUG PUPPIES FOR SALE IN TEXAS PUG PUPPIES FOR SALE MN PUG DOG PUPPY AKC REGISTERED PUG PUPPIES FOR SALE PUG ALL BLACK CHEAP PUG PUPPIES FOR SALE NEAR ME PUGS PUPPIES FOR SALE CHEAP PUG PUPPIES FOR SALE IN CALIFORNIA MINIATURE PUG PUPPIES FOR SALE NEAR ME MINIATURE PUG PUPPIES FOR SALE CHEAP PUG PUPPIES FOR SALE IN NJ KNOWN FACTS ABOUT PUG PUPPIES ADOPT PUG PUPPIS RECUE A PUG PUPPY PERFECT HOUSE OF PUGS PUG PUPPIES INSTAGRAM PINTEREST QUORA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA USA
pugpuppies95 · 39 weeks and 3 days ago
Acquista Ossicodone ItaliaAcquista Ossicodone Italia  Acquista cocaina crack in linea cocaina a squame di pesce italia Acquista cocaina boliviana in linea Acquista Saxenda in Linea Acquista fentermina in linea italia Acquista Ozempic In Linea Acquista Stilnox in linea italia Acquista Ambien in linea italia Acquista Quaaludes in linea Acquista Metaqualone In Linea Acquista subutex in linea italia Acquista Adderall In linea italia Acquista Ossicodone 10 mg Sandoz italia Acquista Laudano droga online Acquista ossicodone pillole Acquista desoxyn in linea italia Acquista buprenorfina in linea italia Acquista ritalin in linea italia Acquista dilaudid in linea italia Acquista ritalin in linea italia Acquista Ossicodone 30 mg Sandoz italia Acquista fentanil in linea italia Acquista Ossicodone Italia Acquista Ossicodone Italia Acquista la morfina iniettabile Italia Acquista Ossicodone 80 mg Sandoz italia Acquista Xanax in linea italia Acquista strisce di Suboxone italia Acquista vyvanse in linea italia Acquista oxycontin in linea italia Acquista Percocet in linea italia Acquista ossicodone pillole in linea italia Acquista morfina in linea italia Acquista ossicodone in linea italia Buy wood online Buy wood pellets online  dried-pods for sale  opium-pods  for sale dried-papaver-pods  dried poppy pods in USA free dried podsdried poppy pods   körkort sverigekörkort sverige köp körkort köp falsk pass BESTÄLLA KÖRKORT ONLINE buy dried poppy pods online buy opium pods buy opium pods Buy dried poppies online dried poppy pods unwashed poppy pods for sale Dried poppy pods near me Poppy seed tea dried poppy pods for craft wholesale dried flowers USA Giant dried poppy heads dried poppy pods dried poppy pods   Führerschein kaufen ohne prüfungkaufen MPU GutachtenKaufen bootsführerschein onlineSchweizer Führerschein kaufen führerschein polen kaufen ohne prüfung FÜHRERSCHEIN ONLINE KAUFEN https://eu-fuhrerscheinlegal.com/product/kaufen-deutschland-fuhrerschein/ Buy wood online Buy wood pellets online
donperi1 · 31 weeks and 4 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

You must be signed in to comment.

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands



Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for: