Backup
Backup an entire hard disk using dd command
The ' dd ' command is one of the original Unix utilities and should be in everyone's tool box. It can strip
headers, extract parts of binary files and write into the middle
of floppy disks; it is used by the Linux kernel Makefiles to
make boot images. It can be used to copy and convert magnetic
tape formats, convert between ASCII and EBCDIC, swap bytes, and
force to upper and lowercase.
For blocked I/O, the dd command has no competition in the
standard tool set. One could write a custom utility to do
specific I/O or formatting but, as dd is already available
almost everywhere, it makes sense to use it.
Like most well-behaved commands, dd reads from its standard
input and writes to its standard output, unless a command line
specification has been given. This allows dd to be used in
pipes, and remotely with the rsh remote shell command.
Unlike most commands, dd uses a keyword=value format for its
parameters. This was reputedly modeled after IBM System/360 JCL,
which had an elaborate DD 'Dataset Definition' specification for
I/O devices. A complete listing of all keywords is available
from GNU dd with
# dd --help
For more options check dd
man
page
Using dd you can create backups of an entire harddisk or just a
parts of it. This is also usefull to quickly copy installations
to similar machines. It will only work on disks that are exactly
the same in disk geometry, meaning they have to the same model
from the same brand.
full hard disk copy
dd if=/dev/hdx of=/dev/hdy
dd if=/dev/hdx of=/path/to/image
dd if=/dev/hdx | gzip > /path/to/image.gz
Hdx could be hda, hdb etc. In the second example gzip is used to
compress the image if it is really just a backup.
Restore Backup of hard disk copy
dd if=/path/to/image of=/dev/hdx
gzip -dc /path/to/image.gz | dd of=/dev/hdx
MBR backup
In order to backup only the first few bytes containing the MBR
and the partition table you can use dd as well.
dd if=/dev/hdx of=/path/to/image count=1 bs=512
MBR restore
dd if=/path/to/image of=/dev/hdx
Add "count=1 bs=446" to exclude the partition table from being written to disk. You can manually restore the table.
Letzte Änderung des Artikels: 2007-07-29 01:05
Verfasser des Artikels: Alen
Revision: 1.1
Es ist möglich diesen Artikel kommentieren
Kommentar von wow gold (2009-01-09 05:42:31):
Bucks' Bogut sits out with back spasms
Posted Jan 3 2009 6:52PM
CHARLOTTE, N.wow goldC -- (AP) -- Milwaukee Bucks center Andrew Bogut did not dress for Saturday night'swow gold game against Charlotte due to lower back spasms.
Bogut's back was bothering wow goldhim a night earlier against
wow gold the Bobcats, when he was held wow goldto two points and five rebounds in 26 minutes. That was wellwow gold below his season average of 11.5wow gold points and a team-best 10.5 rebounds.
"He got through it last night and helped us win the game, but itwow gold got stiff on him this morning," said coach Scott Skiles, whowow gold started Dan Gadzuric in his place.
The Bucks did have backup point guard Ramon wow goldSessions available after he missed Friday's game with wow goldflu-like symptoms.
Kommentar von wow gold (2009-03-19 07:15:49):
wow gold is a limited resource wow gold and is hard buy wow gold to come by even though buy wow gold gold can be earned cheap wow gold by various ways. cheap wow gold Collecting gold is world of warcrft gold very time world of warcrft gold intensive. Because wow power leveling of the enormous need power leveling for Warcraft Gold, it world of warcraft power leveling has attracted many exploiters such as dupers and gold farmers.
Kommentar von wow gold (2009-04-23 04:54:06):
We wow gold strive to wow gold offer wow gold the fastest wow gold and wow gold most reliable nike shoes service on rolex the web buy wow gold for all buy wow gold your gaming buy wow gold needs jordan shoes . Feel cartier free to cheap wow gold contact us cheap wow gold 24 hours cheap wow gold a day sport shoes , 7 days omega a week world of warcraft gold by phone world of warcraft gold, live chat world of warcraft gold and email casual shoes. We rolex watches work hard cartier watches with our omega watches suppliers to replica watches offer the wholesale watches unbeatable prices cheap watcheswe can.
Kommentar von wangli (2009-04-29 10:01:57):
Pakistan's military wow goldsays troops
Kommentar von adsad (2009-07-20 06:58:48):
MY wow power leveling
BUY wow gold
good wow power leveling
buy wow gold
my wow power leveling
cheap wow gold
cheap wow power leveling
buy wow gold
Kommentar von liping (2010-01-04 03:10:01):
Even thoghwow gold to copewow gold with awow golddepressing break wow goldup it may be wow gold tantalising to cheap wow goldgo on reach buy wow goldthe person you nobuy cheap wow gold longer havebuy wow gold cheap relationship with and ask wow gold cheapwhy or trycheapest wow gold ever on to putbc goldt the parts backworld of warcraft gold together. Thiswow power leveling is the most horrifyingwow leveling thing you want to
Kommentar von liping (2010-01-04 03:24:12):
The unbeatablewow gold way to get away thewow buy gold blues! Re-do your closetcheap wow gold. Buy new garments. Buy the new wow gold salelipstick you?ve been desiring since thebuying wow gold last two months. New dark glasses, pocketbooks, heels, whatever wow power levelit claims to make your mindDaoc Gold off him! Camelot GoldThereforeDFO Gold, youDungeon Fighter Gold don?tDarkfall Gold feel too Cheap Darkfall Goldpositivefinal fantasy xi gil aboutfinal fantasy 11 cheap gil yourself nowffxi gil? Thencheap ffxi gil change ffxi cheap gilwhateverRunescape Money you donRS2 Gold?t like! Maple Story MesosA new Maple Story mesohair-do maplestory Mesosmight maplestory Mesostimulatemaple mesos youEverQuest 2 gold feel eq2 platandlineage 1 adena look lineage adenagoodLOTRO Gold. Or LOTR Goldpossibly lord of the ring golda different coh influencestyle ofcity of heroes influence makeups would COV Influencesuit you more.city of vallains influence Lookingmetin2 gold genuine will metin2 yangcause youguild wars feel guild wars goldbetter aion goldyourself.
Kommentar von asa (2010-01-30 12:17:12):
spiele online casino
Kommentar von asa (2010-01-30 12:33:51):
spiele online casino
Kommentar von dupinghua (2010-03-13 10:15:11):
Beautychristian louboutinis louboutin salein louboutin shoesthe christian louboutin Shoeseyechristian sandals of louboutin pumpsthe Christian Louboutinbeholder. IChristian Louboutin am Christian Louboutin Pumps not Christian Louboutin SandalsconventionallySale Christian Louboutin pretty, louboutin pumpseither. Butlouboutin sandalsmy christian shoeslookchristian louboutin shoes isBuy christian louboutin shoes my
Kommentar von dupinghua (2010-03-13 10:17:25):
WhenPandora Jewelry steepping Pandora CharmsintoPandora Jewelry Store thePandora Bracelets spring, therePandora Bracelets is Juicy Coutureajuicy handbagsgreenJuicy Couture Clothingmainstream Juicy Couture Bottomsaround Juicy Couture Apparelus, New Juicy BottomsYork,FebraryJuicy Couture Shoes 17- New Juicy Couture JewelryYork Juicy Couture HandbagFashion Juicy Couture Shoulder BagWeek Juicy Couture Earringis Juicy Couture Banglethewomen's WatchesplaceSwarovski Crystalto Swarovski JewelryspotBuy Swarovski Crystal new Swarovski Charmstrends Swarovski Necklacesand, if Swarovski crystal necklacethis Swarovski Braceletsseason's Swarovski Crystal Braceletsevent Swarovski Earringsis Swarovski crystal Earringsany abercrombieindication, going abercrombie salegreen abercrombie and finchis abercrombie sweaterdefinitely abercrombie menin abercrombie Trousersstyle.Sponsorcheap abercrombie fitch Mercedes-Benz abercrombie and fitch clothesaimed football jerseysfor soccer jerseysthe Liverpool Jerseyssemi-annual Arsenal Jerseysevent AC Milan Jerseysto Juventus Jerseysbepandora pendants carbon neutral for the first time, and several of the designers unveiling fall and winter 2010 collections emphasized organic materials and sustainable designs.
Kommentar von dupinghua (2010-03-13 10:19:11):
After Coach Fashion HandbagstheCoach Wallets HaitiBuy Coach Handbags earthquake, all Buy Coach Walletsthe Coach Handbagsstars Coach Messenger BagsnoCoach Shopping BagsmatterCoach Shoulder Bags which Coach TotescountryCoach Totes thatDiscount Shoes they Jimmy Choo Shoescome Chanel Shoesfrom Christian Louboutin Shoesall tryFendi Shoestheir Ferragamo Shoesbest Gucci Shoesto Manolo Blahnik Shoeshelpand Buy Designer HandbagsJennierPrada Handbags AnistonGucci Wallet are Fendi Handbagsraising LV Bagmoney Louis Vuittonand ルイ?ヴィトンawarenessルイヴィトン バッグ forルイヴィトン ウォレット charityルイヴィトン 財布 in ルイヴィトン 新作theirルイヴィトン 長財布 own Yves Saint Laurent Shoesways.Jolie, 34, went YSL ShoestoYves Saint Laurent Haiti YSL SlippersinYSL Pumps herYSL Sandals role YSL Bootsas ghda UN ghd hair straightnersGoodwillghd purple Ambassadorghd pink toghd pink meet with hospitalized earthquake survivors and the president of the Dominican Republic, Leonel Fernandez.