Programming :: Small C++ Project - Disk Sector Viewer?
Jun 2, 2011
I have a small project that I am trying to do for my job to help us out. Basically, I need to make a tool that lets me view all the sectors of a hard drive in hexadecimal format to make sure they are all zero after a low-level format. I need it to be very minimal, and display the data in a way that I can scroll down and skim through the sectors. Doesn't have to be pretty, just functional.I need it to do more things down the road, but this is the first hurdle I need to overcome. I would like to create a GUI interface so it looks nice, but first I am only concerned with the sector viewing function. I am not entirely sure where I should start.
I see there is a tool called dd I could use to read the hard drive and I am wondering if I need to use that, or if I can just open /dev/hda as a file and be able to view all the sectors that way.Also, just to clarify, I am wanting to write this tool for linux,specifically DSL. I need it to be a very small distribution that can be loaded quickly from a usb drive, cd, or over the network with PXE.
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Dec 29, 2010
I am trying to write my first small project with C++ - implement stl list like collection class. This is what i have a the moment:
Code:
#ifndef GUARD_link_list_h
#define GUARD_link_list_h
template <class T>
struct Node {
[code]....
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Jul 25, 2011
make deb package with samll project of php and myysql database such as login.php, index.php controll.php etc and database_name.sql. when i install this deb package my php script folder should go in /var/www file and databse should create automatically. i edit the control file of deb package , in depends line i set apache2, php and mysql because these three thing are necessary to run my script till here it is ok .but i am not able to send my project in /var/www and configure database automatically . i think for this i have to write .sh file but i dont know bash scripting
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Nov 20, 2010
I was using the disk utility on Ubuntu 10.04 and wanted to make by 500GB external NTFS formatted USB drive into 1 x 50GB FAT32 and 1 x 450GB NTFS. I clicked the option that said format or create a partition and it basically wiped the whole thing in a split second leaving me with 500GB of seemingly empty space. Obviously the files are still there but I cannot boot the drive to view anything. I have downloaded testdisk, but don't know how to use it, but I am sure there is a relatively simple solution here. I am currently repairing the boot sector of the drive as Test Disk showed the drive as "no type" i.e. not FAT/NTFS/ext4 etc., but shows the correct amount of used space though, but I cannot view anything err go, I cannot use the undelete command as yet.
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Jul 5, 2010
I have three disk in my system. One SATA (250GB) and two SCSI (73GB) disks. The Two SCSI disks were installed originally and RHEL3 is installed on it. The SATA disk is installed a few years later with RHEL5. As you can see below, the boot sector is still on one of the SCSI disks (sdb1).
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda1 236545184 15259760 209075624 7% /
/dev/sdc2 68539636 4578792 60479160 8% /users
/dev/sdb1 101089 26847 69023 29% /boot
/dev/sdb3 68437272 36963704 27997104 57% /RHEL3U7
tmpfs 2025916 652 2025264 1% /dev/shm
How I can move the boot sector from the SCSI disk (sdb) to the SATA disk (sda) without losing data and without re-installation?
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Oct 27, 2010
2 months ago, I built a dedicated backup server using 4 2TB SATA drives for software RAID5 (6TB total). A few days ago, smartd sent out mail saying it found an unreadable sector on one of the drives. I ran selftest using smartctl and the error persisted. So far, neither software RAID nor ext4fs running on top of the RAID volume have reported errors.
MOST OPTIMISTIC: It is normal to have a few bad sectors among billions. Software RAID takes care of alternatives. Keep using the system until RAID spits a more serious warning in the future.
MOST PESSIMISTIC: It is a really bad sign to lead a disaster. No good disk drive should have bad sectors especially when it is only 2 months old. The error is simply not detected by software RAID and ext4. Replace the drive immediately and return the bad drive to the supplier.
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Dec 20, 2010
Should the first bootable partition start from sector 1 on a hard disk? or Can it be created anywhere on the disk? I am using fdisk to create the bootable partition.
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Dec 9, 2010
In the past I have been able to succesfully install ubuntu on several external usb drives with up to 500gb in size.Now I am trying to install a copy of ubuntu 10.10 on an external usb iomega 1tb eGo drive but I am having major issues.The installer reports the total disk size as only 124 gb, instead of the 998gb that gParted reports for the same disk. Proceeding with "use the full disk" installs ok, but it doesn't boot.Grub2 reports that it cannot find the kernel.After some desperate attempts to repartition and after some googling I think that the issue may be with the sector size, which fdisk -l reports as 4096kb (all my other drivers report 512kb) and I have the impression that linux is not ready for it (or I lack the knowledge, which seems more likely).I have also tried to install fedora 14. This distribution reports the correct disk size, installs properly, but again, it cannot boot (Fedora uses grub, not grub2), with a very similar message to the grub2 installer.Because of the way I work, I need my external usb drive to be able to boot linux. And I find it difficult to believe that linux doesn't handle 4096kb sector disks, so here I am asking for help . Please note I am not a linux expert.
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Apr 12, 2010
Is there any hope of getting a WD10EARS 4k-sector disk to work properly as a secondary under Etch? Just wondered if anyone had a fix before I RMA and return it as "Not suitable for purpose" WD say it should be OK with linux. But it ain't. It gives very poor perfromance, with a lot of hesitation. The issue is apparently one of sector boundaries, but the exact details are extremely complex.
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Jul 31, 2011
After installing Ubuntu on my computer separately its giving "gdu notification daemon- Disk failure is imminent.Reallocated sector count failing.
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Jun 28, 2009
I've been working in the real world for a year making some money to go back and finish my masters, and now I'm coming to the end of my contract and am realising how little i remember and how small my scope has become; i basically do shell scripts and perl these days, and its making me uneasy. So instead of bitching about it , I'm going to endevor to complete Project Euler Using randomly generated programming languages for each problem, selected from
And post the fruits of my attempts at my blog (shameless plug) aswell as opening up my svn repository when I'm done. (altho i need to ask in another thread about svn permissions....)To my shame i havent ever touched C#, JavaScript, Ruby or Python, so all in all its going to be very interesting how much i screw up.Anyone have any additional ideas, or languages I'm missing or such? I was considering TCL or Haskell or Erlang at a strech, but i dont know how useful these three would be.
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Jan 19, 2011
am installing 10.10 on a 7.5GB hdd.
Can anyone recommend what partition(s) i should create, (primary/logical)|(size)|(filesystem type)|(mount point).
It has 1gb ram, although that will be upgraded to 2 in the next few days.
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Jan 4, 2010
I am trying to make small kernel. I have written many programs and produce many .bin and .o files but what I want that to load every file from a specific location in specific sectors but don't know how to do that in linux , in dos same can be done by debug command.If It is not possible to achieve the specific location criterion please tell me how can I just copy many files serially to a floppy image.I have another question that if files are copied in floppy. How could I know in which sector the file has been loaded in floppy so that I can retrieve them by BIOS interrupt INT13.
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Jan 12, 2010
I'll get to the point straight away... I'm trying to install OpenSuse 11.2 on a HD that already has Win 7 on it.I left out 15.52 GB of space just to install Opensuse but when I select that partition (which of course is empty) and tell YaST2 to install OpenSuse there it tells me there isn't enough space. Is 15 GB not enough!?inimum requirements where supposed to be 3GB I think...S this is how the disk is devided... Primary partition of 50GB for win 7, 400 of Logic partition for Programs, and supposedly 15GB for OpenSuse...
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Mar 10, 2010
I'm looking for a small terminal tool to verify a burned disc and compare it to an iso file.
I googled for verify burned disc/dvd - no mateches.
There is a thread, which tells how to do it in k3Burn - but I need it on terminal to use it with ssh.
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Jul 4, 2010
I'm writing a C program that reads the boot sector of a USB disk. (it is mounted as /dev/sda1). I'm able to read the sector, by the calls code...
The problem is when I wish to write. I use the call:
bytesWrite = write(fd, buf, 512)
The 'write' returns the value of 512, which looks as if the write was successful, yet
when I read again the /dev/sda1 device, I see that no writing was actually made.
Can anybody tell me what do I need to do in order to allow an actual write to the
device?
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Sep 1, 2010
I have a 160GB harddrive which I installed a F12, would like to upgrade to a bigger drive, but I hate to have to re-install everything.
Recommend a good disk copy utility? The utility should be able to not only copy files, but boot sector and everything. So I just need to make a copy, change my BIOS to boot from the new drive and run everything as before.
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Jan 3, 2011
I recently installed meego on an asus eee pc, neat l ittle os. i had originally had grub set up booting into ubuntu netbook remix. win xp and the system restore partition. when i installed meego i was allowed to select what i wanted as far as boot options in the new boot loader (extlinux). windows and meego boot just fine but when i try to get into my already configured and homey install of ubuntu nbr it gives an error of
"boot sector signature not found (unbootable disk/partition)"
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May 22, 2010
I need a small distro... that i can fit into a 1.44 Mb floppy disk... so i can install latest lilo.
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Aug 20, 2010
also some options in menues are disable..when i go to the terminal it shows this msge:<unknown program name>(5763)/ KDevelop::allocateRepository: picked duchain directory "/home/forensic/.kdevduchain/{61e2fad9-a888-45c7-91e7-c7098bc67b94}/0"maybe i made mistake in one step of compiling it..
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Apr 26, 2010
I would like to ask your opinion for a new C++ project.I just finished writing a chess engine in a software engineering lecture.I don't see any way to continue with that project and I would like some new ideas.I would prefer to start something on my one but suggestions about small open source projects that are already out there are welcome.
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Nov 5, 2010
I have project released under GPL. I have found an icon (.png) I want to use in it that also has a GPL license. What do I have to do, if anything, to use it legally? It's "just an icon", and while it represents a significant amount of work on someone's part, it doesn't come with any source code or embedded licenses that I can just copy and include with my project files. I'm sure I can use it because it's GPL and my project is GPL.
That's what GPL was designed for, but I don't want anyone to think I'm claiming I designed it or that I took it without giving proper credit. I just reread the GPL, and it looks like I can do anything I want with it as long as I don't restrict anyone else from doing the same and if I were to modify it, I'd have to put a notice "somewhere" (but where would that be for an icon?) acknowledging that modification. I don't see anything that would make me actually mention it at all in my documentation, etc. as long as I pass it along unmodified.
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May 12, 2010
I have the joyous task of having to find and fix a bug in a large opensource project for an assignment. Fixing the bug should only take about 4 hours according to the lecturer. I would prefer the source language of the project to be Java, since my C++ is quite rusty.
So, does anyone have some experience in this type of thing, and can you give me advice about which projects would not be nasty to an ignorant student? Also, which tools did you use to make it easier for you? I want to learn how to do this,but I'm just a bit clueless at present.
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Apr 6, 2009
I am trying to write a CMakeList.txt for a project (A). The project needs to use the library of another project (B). For gcc, using -L <path> -ldl works. How can I convert that into cmake file? I tried include_directories, that doesn't seem to work
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Jun 21, 2010
I'm using ubuntu 9.04;I want to debug my project that comprises mutiple files.When I cd to the project folder and run the command "gdb rawusb_test",Once I tried the flag -g and changed the line "$(CC) -o $(PROG) $(OBJS) $(LIBS)" to "$(CC) -g -o $(PROG) $(OBJS) $(LIBS)", it didn't work!I want to trace the program "rawusb_test" line by line and see the parameters' values!Could you help me how I should debug this project or how the Makefile should be changed?
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Nov 11, 2009
Now I have a project which include three directories /bin, /inc and /src. All of header files (*.h) are included in /inc and all of source(*.c) files are stored in /src, i.e. a.c, b.c, c.c..., the final generated executable file will locate in /bin. after compling with makefile, all of obj files will be generated in /src/obj like a.o, b.o, c.o, d....! Moreover an final.exe executable file will be generated in the /bin directory. Now if I want to debug it with GDB, how can I do it?
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Mar 11, 2010
I am a Master's student.I am a newbie to Linux. I am interested in doing a term project in C kernel programming. I need help in developing a project in which I can use C kernel programming .
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Jan 31, 2011
First step will obviously be to compile the QT project with -g option, but how to do that through command line?
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Jun 10, 2010
I've got the "OpenCryptoKi" project source from "sourceforge.net" at here:But I don't know how should I compile and build it by "GCC" or "Make"?!I have ubuntu 9.04 and I've set the linux runlevel at 3, but I'm not so familiar with compiling such project at commandline environment of linux
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Dec 14, 2010
I'm using Eclipse to build a small c++ program using boost.
Code:
#include<iostream>
#include<string>
#include <boost/regex.hpp>
[code]....
I can right click on boost::regex and it takes me to the header file regex_fwd.hpp, but when I go to build it, it gives me the error:
Code:
DescriptionResourcePathLocationType
/usr/include/boost/regex/v4/basic_regex.hpp undefined reference to `boost::basic_regex<char, boost::regex_traits<char, boost::cpp_regex_traits<char> >
[code]...
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