Virtualbox Acceleration

While installing any operating system through a virtualbox when you give start you may encounter the below error.

Restarting your computer entering BIOS you need to go to security there and enable Acceleration and Hyperthreading.

In some bios these are not present.

 Take a hard look at all the options available. Under system configuration, there could be a disabled feature called 'SVM Support'. The description only will state that it enabled or disabled SVM support, but would not explain what SVM support is.  SVM support is what AMD uses for virtualization.    Enable it, save the changes and continue booting the machine;  then  launch Virtual Box to test it: the acceleration tab would be accessible, and the VM would start with zero errors, and any operating system will start installing.

Architecture 32-bit or 64-bit version

Open a terminal(Ctrl+Alt+T) and type: uname -a

Result for 32-bit Ubuntu:

 Linux discworld 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:50 UTC 2011 i686 i686 i386 GNU/Linux

 whereas the 64-bit Ubuntu will show:

 Linux discworld 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:50 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux

 Shorter version:

$ uname -i

x86_64

or

$ file /sbin/init

Result for 32-bit Ubuntu: /sbin/init: ELF 32-bit LSB shared object, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.15, stripped

 whereas for the 64-bit version it would look like: /sbin/init: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.15, stripped

Same for systems using systemd (16.04):

$ file /lib/systemd/systemd

Result for 64-bit: /lib/systemd/systemd: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, BuildID[sha1]=54cc7ae53727d3ab67d7ff5d66620c0c589d62f9, stripped

External Hard Disk Not Mounting

In Ubuntu....

In some cases external hard disk though visible does not mount and shows the following error...
 

Error mounting: mount exited with exit code 13: $MFTMirr

does not match $MFT (record 0).

Failed to mount '/dev/sdb1': Input/output error NTFS is

either inconsistent, or there is a hardware fault, or it's

 a SoftRAID/FakeRAID hardware.  In the first case run chkdsk /f on Windows

 then reboot into Windows twice. The usage of the /f 

parameter is very important! If the device is a SoftRAID/

FakeRAID then first activate it and mount a different 

device under the /dev/mapper/ directory, (e.g./dev/mapper/

nvidia _eahaabcc1).  Please see the 'dmraid' documentation

for more details.

You can solve this by using ntfsprogs package

In the terminal (Ctrl+Alt+T) type the below following codes

Get package Code:

sudo apt-get install ntfsprogs

fix it Code:

sudo ntfsfix /dev/sdb1 

This should fix the problem without rebooting the PC.

If still the problem persists then you need to plug it into the windows operating system to run checks for a proper fix.