There should always be an su or sudo command available, even if you are
root. To find out who you are logged in as you can do "whoami". The root
user account is turned off by default so maybe that is interfering with
what you're doing. If your account has admin rights, often times you can
do root-like things without actually being root.
CB
On 9/15/15 3:07 AM, Eric Oyen wrote:
hmmm. thats weird. sudo is an integral part of the command line utilities
included with OS X. then again, I am not on the latest OS X (I am still stuck
in Lion until I can get a newer machine).
-eric
On Sep 14, 2015, at 5:07 PM, Joe Quinn wrote:
sorry to keep bringing this up, but I just tried to go into recovery mode to see what I could do to
fix the partitions, but, I can't do anything with GDISK, because there's no "sudo," or
"su" commands in this version of terminal. however, i didind that I was in root, oweing
to the # at the directory. also, typing GDISK at the prompt yeilds a not found message. any ideas
anyone?
On Sep 13, 2015, at 2:25 AM, Eric Oyen <[email protected]> wrote:
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 <[email protected]> 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 <[email protected]> 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 <[email protected]> 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 <[email protected]> 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
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