Programming :: Cloning USB Drives Using C++
Feb 23, 2010
I have a device running Linux, which has a master USB and 16 Slave USB's. I need to make the slaves identical to the master.
What i'm doing is reading bytes from the master by reading /dev/sd{master} and writing to /dev/sd{slaves} . I am doing this since I need to display progress of the operation.
Do you think this will pose any problems? Is there any better technique?
Also, if the source drives size is smaller than the dest drive, will it create any problem....or will the USBs still be identical after that..
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May 7, 2010
I have 4 separate drives, all un-RAIDed.Each drive has almost the same root directories, but different contents in each folder.
For example:
/mnt/sda/TV Shows/Lost/
/mnt/sdb/TV Shows/Your_Favorite_Show/
The goal is to have a single folder that has symlinks to all the files in each of the drives. Pretty much a poor man's JBOD. Previously, I had problems with conditions like 2 drives having the same sub folder contents, but I ended up solving that with the current script I'm using now.What I'm looking for now is speed. I'm very new to Perl and the script takes about 12 minutes to complete with the current drives.
Basically, the script makes a list of all directories and files in each drive. First, it makes the directories. I didn't use any validation because if a directory already exists, it simply won't make one. However, with the files, I used a hash to only keep the unique files. Then I use the key/value pairs with ln to create every link to the files only, not directories.
Code:
#!/usr/bin/perl
use warnings;
my @drives_to_sync = qw ( /mnt/sda/ /mnt/sdb/ /mnt/sdc/ /mnt/sdd/);
[code].....
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Jan 28, 2011
Am doing a simple partition imaging program. Am using libparted for partition things. Before that I want to list the available hard disks (/dev names) attached to the PC Programmatically.
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May 9, 2010
upgraded from karmic through update managerANDnone of of my external drives cd drive or flash drives are picked upad to go back to karmic and will remain there for a whil
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Jan 18, 2010
I'm breaking into the OS drive side with RAID-1 now. I have my server set up with a pair of 80 GB drives, mirrored (RAID-1) and have been testing the fail-over and rebuild process. Works great physically failing out either drive. Great! My next quest is setting up a backup procedure for the OS drives, and I want to know how others are doing this.
Here's what I was thinking, and I'd love some feedback: Fail one of the disks out of the RAID-1, then image it to a file, saved on an external disk, using the dd command (if memory serves, it would be something like "sudo dd if=/dev/sda of=backupfilename.img") Then, re-add the failed disk back into the array. In the event I needed to roll back to one of those snapshots, I would just use the "dd" command to dump the image back on to an appropriate hard disk, boot to it, and rebuild the RAID-1 from that.
Does that sound like a good practice, or is there a better way? A couple notes: I do not have the luxury of a stack of extra disks, so I cannot just do the standard mirror breaks and keep the disks on-hand, and using something like a tape drive is also not an option.
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Jun 9, 2011
so I setup a raid ten system and I was wondering what that difference between the active and spare drives is ? if I have 4 active drives then 2 the two stripes are then mirrored right?
root@wolfden:~# cat /proc/mdstat
Personalities : [raid0] [raid10]
md1 : active raid10 sda2[0] sdd2[3] sdc2[2] sdb2[1]
[code]....
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Mar 26, 2011
I am building a home server that will host a multitude of files; from mp3s to ebooks to FEA software and files. I don't know if RAID is the right thing for me. This server will have all the files that I have accumulated over the years and if the drive fails than I will be S.O.L. I have seen discussions where someone has RAID 1 setup but they don't have their drives internally (to the case), they bought 2 separate external hard drives with eSata to minimize an electrical failure to the drives. (I guess this is a good idea)I have also read about having one drive then using a second to rsync data every week. I planned on purchasing 2 enterprise hard drives of 500 MB to 1 GB but I don't have any experience with how I should handle my data
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Jun 21, 2010
I recently had issues with the latest version of the Linux Kernels and I got that fixed but ever since that has happened none of my Drives will mount and they aren't even recognized.
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Oct 18, 2010
I suspect this is not new but I just can't find where it was treated. Maybe someone can give me a good lead.I just want to prevent certain users from accessing CD/DVD drives and all external drives. They should be able to mount their home directories and move around within the OS but they shouldn't be able to move data away from the PC. Any Clues?
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Jan 28, 2010
i have recently setup and installed Ubuntu 9.04 on a virtulal drive usingVMWare 6.04, installed the desktop gui as well, I need to add other drives for data and loggng, which I did in the VMWare side. I can see the 2 drives in ubuntu, but can not access them, I get he unable to mount location when I try. How can resolve this please as I need these to virtual drives to be used as data drives.
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May 1, 2011
I've used it once before but got fed up with the boot asking me everytime I turned my laptop on because I wasn't using it enough. I have Windows 7 on drive C . I want to keep it on drive C. I have several 1.5TB+ drives, and one of them is not being used. I want to dedicate it to Ubuntu, and be able to do a dual boot with my Windows 7 install. Is this possible? If it is, what about when this drive is not connected to my laptop? Will that mess up the boot process?
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Jan 8, 2010
So, at the moment I have a 7TB LVM with 1 group and one logical volume. In all honesty I don't back up this information. It is filled with data that I can "afford" to lose, but... would rather not. How do LVMs fail? If I lose a 1.5TB drive that is part of the LVM does that mean at most I could lose 1.5TB of data? Or can files span more than one drive? if so, would it just be one file what would span two drives? or could there be many files that span multiple drives drives? Essentially. I'm just curious, in a general, in a high level sense about LVM safety. What are the risks that are involved?
Edit: what happens if I boot up the computer with a drive missing from the lvm? Is there a first primary drive?
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Aug 4, 2011
Recently purchased an SSD drive to replace my existing mechanical drive. My source hard drive is a 750gb and destination SSD is 256gb. My current partition setup on my source drive looks like this:
/home 639 GB, 137GB used
/ 46 GB, 6.4GB used
My destination SSD drive's partition table current looks like this:
/home 238 GB
/ 18 GB
I originally was going to use Clonezilla to do the partition copying but found out that the destination partition must be equal or larger than the source one.
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Mar 28, 2010
I was wondering how can I clone old hdd to new hdd directly. Is this right procedure?
sda is new hdd
sdb is old hdd
Code:
sudo sfdisk /dev/sda < sudo sfdisk -d /dev/sdb
cloning ntfs partitions.(X are ntfs partitions)
Code:
sudo ntfsclone --overwrite /dev/sdaX /dev/sdbX
cloning other partitions.
Code:
sudo dd if=/dev/sdbX of=/dev/sdaX bs=8MB
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Aug 10, 2010
I had to change my disc for a bigger one, and i want to transfer all my dataconfigurations, etc to a partition in another disk, a simple ctrl C, ctrl V will do or theres a specific tool that i need? I dont want to download all the updates, programs and go through the hassle of reconfiguring everyhtingmy new disk have windows 7 and i installed a fresh ubuntu on it but i want it to be a clone of my old onePS: i just notice now that grub no longer recognize both win7, the old and the new. What's wrong?
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Jul 28, 2010
I want to clone my fedora8 HDD using clonezilla.I have downloaded,and want to boot from that.I have created one partition sda8 with 740 mb and formatted with ext3 and mounted that on /mnt. I have extracted the files onto /mnt from clonezilla zip file. I appended the necessary lines told by website to the grub.menu.lst , after rebooting when i select that clonezilla from grub,it was telling unrecognized format and cant mount the partition.
how to mount the partition permanently in fstab. Tell me how to modify the grub file to work correctly to boot from that partition.
Output of fdisk
Disk /dev/sda: 80.0 GB, 80025280000 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xa95ea95e
[Code]....
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Jun 14, 2009
just wanting to know if anyone has implemented Fog (fogproject.org) on openSUSE. We use it at work throughout our enterprise for reimaging machines and it works very well.
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Apr 26, 2010
We are giving away 20+ machines to 3rd world county and I was asked from the receiving party to install linux on them. What I don't want is to pop a cd into all of them and do the manually install.
I'm thinking of installing one computer the old fashion way and do the OEM-configuration on it afterwards. It would be nice to just clone the hard drives since the computer is identical right down to the hard drive.
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Nov 1, 2010
I am trying to clone my internal drive on my laptop using the dd command after starting up my computer using the 10.10 installer CD. Nothing happens when I follow the instructions from this site: [URL] When I follow these instructions, it doesn't work. I know that I am not being specific here but all I can say is that nothing happens. What am I doing wrong. My internal drive is 250GB and the partition I created on my DOS formatted external drive is 250GB as well.
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Apr 13, 2011
have a binary image that I can copy to a partition and have done so successfully in the past. The image is smaller than the partition size, and everything is all good. However, I noticed that in copying the 5 gb image to the 9 gb partition there are 4 gb that are unnoticed by the system. It still registers the partition at the correct size in Gparted and Disk Utility.
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Apr 18, 2011
I've spent the better part of an afternoon looking for a solution to a problem: backing up my installation of 10.10 as an image file to an external hard drive. My research has yielded a lot of suggestions for clonezilla, dd, and partimage/particlone, but those don't seem very appealing, due to a number of issues (can't backup live, copies free space as well, doesn't handle ext4, etc). Also why is clonezilla 150mb?
I'd like a simple solution that can clone an entire disk (used space only) to an explorable image file on a separate hard drive and be able to do it while the operating system is running on the disk. I used to use apricorn ez gig to do this on windows and it worked like a charm, but I can't seem to find a similar solution that creates and explorable .iso image file with linux. I've used superduer on osx, which is awesome and i wish there was something like that for ubuntu/linux.
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May 10, 2011
Currently I backing up the MBR, the C and the other partitions to an external USB HDD and from there I restore them if needed. I use the SystemRescueCd and commands like dd if=/dev/sd* of=/mnt/PC_name/backupmbr.1 count=1 bs=512 and ntfsclone --save-image --output /mnt/PC_name/PC_name_c.img /dev/sd*1 etc. I want to clone the HDD the way, however, that I omit the external USB drive. I want to connect the new HDD to the PC and do the cloning directly from one disc to the other.
My questions are:
- Can you provide me with the exact command?
- Is that a difference if the disc is SATA or IDE?
- Can I copy the disc even if the old disc don't wan to boot?
The OS is Windows on the disc I want to clone.
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Nov 11, 2010
I'm teaching a course in programming where the student assignmentswill be managed with git. The idea is that every student starts outwith an identical but individual repository on a server. They can then work on their code from different locations without having to manually copy files (only clone,commit,push,pull).The initial repository contains the code base for the assignmentand I'm wondering if it is safe to just initialize one of these with git and then copy that folder to every student's "area" on the server?(authentication and authorization is done on a folder basis with apacheand ldap and works fine)The thing that makes me wonder is the "remote origin" in the config file on the server repositories which does not seem to change with ubsequent pushes. Instead it always contains the location from where I did the very first push into an empty bare repository.
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Oct 3, 2009
I have a rock solid server running CentOS 5.3 (probably 5.4 soon enough). Basic LAMP box with a few tweaks thrown in. Everything is running perfectly, with one problem - the drive is too small (I project it filling up to dangerous levels in 6-8 months). So, what I'm looking to do is basically clone the drive, store the image, pull the current drive and replace with a bigger drive (same number of heads and cylinders though), and install the image.
What I did do once, a million years ago, is put the new drive as a slave on the same IDE cable, and use dd (working from a live CD of the distro) to copy from the master (smaller) to slave (larger). Then, yank the smaller, change jumper on bigger drive from slave to master, and away I go. Next step as I recall was using gparted to get access to all the space on the new, bigger drive.
Is this more less still a reasonable way to go? I recall the issue was making sure the old smaller and new larger drive had the same number of heads/cylinders (although I don't remember exactly why).
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Aug 12, 2011
Basically I have setup and configured a CentOS 5.6 system on one server, and will be getting a brand new server in about a months time I was wondering if there was a way to clone a system from one server to another so I don't have to add all the users again, the config files are not a issue as I can just copy them over, but having to re-do all the user accounts, smb accounts and folder permissions will be a pain.
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Jul 5, 2011
I have Fedora 14 installed on my main internal drive. I have one Fedora 14 and one Fedora 15 installed on two separate USB drives.When I boot into any of these drives, I can't access any of the other hard drives from the other drivesll I can, but just the boot partitions.Is there any way of mounting the other partitions so I can access the information?---------- Post added at 12:42 PM ---------- Previous post was at 09:34 AM ----------I guess even an explanation on why I can't view them would be good too.
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Aug 23, 2010
I have an email server that I think is about to have a hard drive fail. It is running an old install of Redhat 9.0 I think. It has 2 120gb hard drives mirrored as a raid1. I want to copy those to a new pair of 500gb hard drives again as the same disk raid1 mirror. What tool would work for this? DD or partimage? Would it all be exactly the same and boot up still?
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Dec 4, 2015
I have read several manuals and online html on how to clone a partition to a greater one, I am still not sure about what to do.
Code: Select all# df -k /srv /usr
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/md5 38445384 195236 36297128 1% /srv
/dev/md3 8648896 1088016 7121540 14% /usr
What is the recommended procedure to clone i.e. /dev/mdx (/usr) partition to a greater one, say /dev/mdy, to accommodate for growth, whilst preserving attributes including timestamps (and yes, that means also including ctime).All of # cp -ax SOURCE DEST, # rsync -ax SOURCE DEST and # cpio modify ctime.Some sites recommend dd, i.e.:
Code: Select all# dd if=/dev/mdx of=/dev/mdy bs=512 conv=noerror,notrunc,sync
URL....However, I am not sure what will dd copy do with end of partition, and will it see the remaining space on /srv (it's contents are dummy and will be overwritten).
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Jul 28, 2011
When I first switched from windoze to Fedora I trimed a bit of space off the end of the HDD, formatted it to ext3 and installed Fedora 14 there. I have now completely rebuilt the machine and put a 2TB drive in. My intention was to upgrade to Fedora 15, but after a few weeks trying to get the new gnome to anything resembling useful, I gave up and decided to go back to the reliable 14.
I tried the old drive, and everything worked great, so I though no problem, clone that over to the new drive, and job done, no need to mess about for weeks getting all my settings back. I booted from the old drive with both connected and ran gparted, It sees both drives but won't let me copy the old partition. It complains about 'LMV is not yet supported' I tried booting from a gparted ISO with the same result.
How can I get this sorted? I've got work needing done, I don't have time to start from scratch (*AGAIN*),
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May 26, 2011
I haven't used linux in a long time, and have to install OpenSUSE 11.3 on ten of our servers. What I plan to do is install OpenSUSE and all our required software on one of the servers, and then clone that drive to all the other server drives (the servers are hot swappable). My question is:
What do I need to worry about conflict wise? So far the only conflicts I can see that I will need to address are machine name (hostname) and set unique static IP addresses? How can I change the machine name (ie. server01, server02 ...) and IP address? Is there any other stuff I need to change as well?
We have a 2U file server running windows. All of the servers (1 x Win and 10 x linux) will be connected to a 24 port gigabit switch.
Is there also any special stuff I need to do to allow access to the Windows server (file etc)?
I will also require remote access to the servers, but assume that this will be easy to setup?
As for sleep mode, I assume that's fairly easy to configure through the interface?
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