yes. you use the command dd thus: dd if=/Volumes/Media/backups/backup.img of=/dev/sda
that will write all information back to the new drive in exact bit for bit order. -eric On Sep 12, 2015, at 10:46 PM, Joe Quinn wrote: > Then how do you restore it? Reverse it? > > Sent from my iPhone > >> On Sep 13, 2015, at 12:25 AM, Eric Oyen <eric.o...@icloud.com> wrote: >> >> well, >> if you use dd and you set the input file to be the first device for the HDD >> in /dev (the root device for the drive), then *everything* should be copied >> bit for bit. No missing data, no corruptions. In this case, your root drive >> would probably be /dev/sda (with 1 thru x being the partitions in order). >> >> here is what I use to backup my system: dd if=/dev/sda >> of=/Volumes/Media/backups/macHD.img >> >> that copies the entirety of the primary boot drive (and all its partitions, >> boot records, etc.) into a single contiguous file. no muss, no fuss. I have >> room on my 2 TB external for at least 1 months worth of backups at one per >> week. Considering that the boot drive is only 256 GB, it leaves me a lot of >> room for other things (including storing backups of documents, installation >> files, and my talking book library. Not too shabby, eh? >> >> -eric >> >>> On Sep 12, 2015, at 5:09 PM, Joe Quinn wrote: >>> >>> did i ask this before, i use dd, but then I'd still have same problem with >>> the corrupt partition issue, right? forgive the question if I asked it >>> before. >>> >>> Sent from my iPhone >>> >>>> On Sep 12, 2015, at 9:14 AM, Eric Oyen <eric.o...@icloud.com> wrote: >>>> >>>> well, here is how the drive imaging works with Disk utility. >>>> >>>> you can create a hard disk image, partition it and then copy the relevant >>>> files to it. mind you, this is not exactly a clone. I haven't tried this >>>> particular method myself, so I am not sure if it would work. >>>> >>>> However, if you dd the entire device, all information (including boot >>>> record, partition map, drive allocation tables, volume bitmaps and >>>> everything else is preserved as a bit for bit image. with a large enough >>>> backup drive, you can store the entire image as a single file. This is the >>>> method I use and it works 100% of the time. THe other method (creating a >>>> disk image using DU) will not have the same results. you might miss some >>>> things like the MBR, partition tables and a few other needed items. now, I >>>> use dd as a matter of course simply because I don't have money to throw at >>>> a backup program that may, or may not, be entirely accessible for the >>>> totally blind user. it is also an included command line app that can be >>>> run in terminal from the recovery partition. SInce I can run this recovery >>>> partition from either a CD or a USB stick (properly configured), I don't >>>> have to worry about anything on the system drive that might accidentally >>>> get wiped (considering that I am wiping it anyway). >>>> >>>> if you need more info on dd, you can read here: >>>> https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man1/dd.1.html >>>> >>>> -eric >>>> >>>>> On Sep 12, 2015, at 6:31 AM, Joe Quinn wrote: >>>>> >>>>> So if I Image my boot camp partition, then I deleted, reinstall it, and >>>>> then restore it, would it boot? I assume not because as you said it >>>>> wouldn't copy everything, only where there is data. I'm just confused. >>>>> :-) I should just come in and Match the start and sectors of the >>>>> partition tables. >>>>> >>>>> Sent from my iPhone >>>>> >>>>>> On Sep 12, 2015, at 12:41 AM, Eric Oyen <eric.o...@icloud.com> wrote: >>>>>> >>>>>> that would work. you can create a sparse image of the drive as an image >>>>>> file on another volume. the beauty about this is that only those places >>>>>> that have data will be copied. ANything without data will simply be >>>>>> ignored (as a zero space allocation). THis generally only works if you >>>>>> create a sparse image volume to mimic a hard dis and then do a copy of >>>>>> all the files inside the partition. its not exactly a bit for bit >>>>>> backup, but it serves as a stopgap. >>>>>> >>>>>> -eric >>>>>> >>>>>>> On Sep 11, 2015, at 1:24 PM, Joe Quinn wrote: >>>>>>> >>>>>>> there's an "image" function in disk utilitity. would that work or do >>>>>>> anything? it's in the tolbar with firstaid, restore, etc. >>>>>>> >>>>>>> Sent from my iPhone >>>>>>> >>>>>>>> On Sep 11, 2015, at 8:35 AM, Eric Oyen <eric.o...@icloud.com> wrote: >>>>>>>> >>>>>>>> I mentioned dd. Believe me, its a lot better than msbackup. the last >>>>>>>> time I used MS Backup, it missed a number of files in my user settings >>>>>>>> directory. so, these days, I backup the windows partition to an >>>>>>>> external drive as an image file. I do so once per week and only keep 2 >>>>>>>> consecutive backups. THis way, I have the next most recent and the >>>>>>>> most recent backups on hand should something be amiss. >>>>>>>> >>>>>>>> -eric >>>>>>>> >>>>>>>>> On Sep 11, 2015, at 5:50 AM, - wrote: >>>>>>>>> >>>>>>>>> >>>>>>>>> Someone mentioned "dd" as a backup utility in terminal. Ditto and >>>>>>>>> rsync can perform the same function. In google use "os10 backup" and >>>>>>>>> one of the names for tons of web sites for using them as backup. >>>>>>>>> >>>>>>>>>> On Thu, 10 Sep 2015, Joe Quinn wrote: >>>>>>>>>> >>>>>>>>>> What are some good back up programs that will back up my Mac OS X >>>>>>>>>> drive as well as the Boot Camp partition? I think I'm going to need >>>>>>>>>> it. :-) >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> Sent from my iPhone >>>>>>>>>> >>>>>>>>>> -- >>>>>>>>>> You received this message because you are subscribed to the Google >>>>>>>>>> Groups "MacVisionaries" group. >>>>>>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>>>>>> send an email to macvisionaries+unsubscr...@googlegroups.com. >>>>>>>>>> To post to this group, send email to macvisionaries@googlegroups.com. >>>>>>>>>> Visit this group at http://groups.google.com/group/macvisionaries. >>>>>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>>>> >>>>>>>>> XB >>>>>>>>> >>>>>>>>> -- >>>>>>>>> You received this message because you are subscribed to the Google >>>>>>>>> Groups "MacVisionaries" group. >>>>>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>>>>> send an email to macvisionaries+unsubscr...@googlegroups.com. >>>>>>>>> To post to this group, send email to 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http://groups.google.com/group/macvisionaries. >>> For more options, visit https://groups.google.com/d/optout. >> >> -- >> You received this message because you are subscribed to the Google Groups >> "MacVisionaries" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to macvisionaries+unsubscr...@googlegroups.com. >> To post to this group, send email to macvisionaries@googlegroups.com. >> Visit this group at http://groups.google.com/group/macvisionaries. >> For more options, visit https://groups.google.com/d/optout. > > -- > You received this message because you are subscribed to the Google Groups > "MacVisionaries" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to macvisionaries+unsubscr...@googlegroups.com. > To post to this group, send email to macvisionaries@googlegroups.com. > Visit this group at http://groups.google.com/group/macvisionaries. > For more options, visit 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