unable to access other partitions of hard disk

Can you give the output of:

sudo parted -l; lsb_release -a; uname -a

Thanks

following is the output

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 12.04.1 LTS
Release: 12.04
Codename: precise
Linux rinesh 3.2.0-29-generic-pae #46-Ubuntu SMP Fri Jul 27 17:25:43 UTC 2012 i686 i686 i386 GNU/Linux

sorry previous one is wrong output
this one is correct

Model: ATA ST3500418AS (scsi)
Disk /dev/sda: 500GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number Start End Size Type File system Flags
 1 32.3kB 100GB 100GB primary ext4 boot
 2 100GB 300GB 200GB primary ext4
 3 300GB 304GB 3504MB primary linux-swap(v1)
 4 304GB 500GB 197GB primary ext4

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 12.04.1 LTS
Release: 12.04
Codename: precise
Linux rinesh 3.2.0-29-generic-pae #46-Ubuntu SMP Fri Jul 27 17:25:43 UTC 2012 i686 i686 i386 GNU/Linux

sorry previous one is wrong output
this one is correct

Model: ATA ST3500418AS (scsi)
Disk /dev/sda: 500GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number Start End Size Type File system Flags
 1 32.3kB 100GB 100GB primary ext4 boot
 2 100GB 300GB 200GB primary ext4
 3 300GB 304GB 3504MB primary linux-swap(v1)
 4 304GB 500GB 197GB primary ext4

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 12.04.1 LTS
Release: 12.04
Codename: precise
Linux rinesh 3.2.0-29-generic-pae #46-Ubuntu SMP Fri Jul 27 17:25:43 UTC 2012 i686 i686 i386 GNU/Linux

Ok, which partition do you want to mount?

both
dev/sda2 and dev/sda4

ok and the output of:

mount

Thanks

following is the output of :

mount

/dev/sda1 on / type ext4 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
none on /run/shm type tmpfs (rw,nosuid,nodev)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev)
gvfs-fuse-daemon on /home/rinesh/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=rinesh)

thank you

Try:

sudo mkdir /media/sda2
sudo mount /dev/sda2 /media/sda2
sudo mkdir /media/sda4
sudo mount /dev/sda4 /media/sda4

Should now be accessible from the 2 folders in /media

still it shows the same message when i try to open the partition:

"the folder content could not be displayed"
"You do not have the permissions necessary to view the contents of "documents"."

you can view the screen capture here :
http://ubuntuone.com/4ZkHohSyGdLbNsSeBCzPwA

Is the filesystem for pure data storage or is it another distribution?

i dint get your question but still here is a screenshot which may help you
http://ubuntuone.com/5p78cCqVgQPVKvfVVgHKUb

Do the Ext4 partitions contain only your user data?

yes

Then run:

sudo chown -R $USER:$USER /media/sda2
sudo chown -R $USER:$USER /media/sda4

And you will get access.

not yet
:-(

If you want to access these folders with nautillus , then you must open nautilus as super-user.

BE CAREFUL with this option cuz you will have access to sensitive data of your Operating System and you can destroy it.

From terminal give

1) gksudo nautilus

Thanks

sorry, but this is not a proper solution i can access those partitions for temperory

can you give me solution for accessing those parttions as a normal user to access them on regular basis

i am not twechnician therefore i could not understand first way and second way dint work properly

Can you mount the partitions and provide the results of bellow commands ?

ls -l disk1/

ls -l disk2/

Also give the results of these commands

sudo blkid

cat /etc/fstab

Thanks

Thanks NikTh, that solved my question.