creat-and-mount

1. Using the fdisk utility, check to be sure there is an available drive on your lab server with no partitions currently. If not, be sure to use the mount 'play' button on your lab server tab to create one.

    root@tcox1:~# fdisk -l

     

    Disk /dev/xvda: 16.1 GB, 16106127360 bytes

    255 heads, 63 sectors/track, 1958 cylinders, total 31457280 sectors

    Units = sectors of 1 * 512 = 512 bytes

    Sector size (logical/physical): 512 bytes / 512 bytes

    I/O size (minimum/optimal): 512 bytes / 512 bytes

    Disk identifier: 0x00000000

     

        Device Boot      Start         End      Blocks   Id  System

    /dev/xvda1   *       16065    31455269    15719602+  83  Linux

     

    Disk /dev/xvdf: 1073 MB, 1073741824 bytes

    255 heads, 63 sectors/track, 130 cylinders, total 2097152 sectors

    Units = sectors of 1 * 512 = 512 bytes

    Sector size (logical/physical): 512 bytes / 512 bytes

    I/O size (minimum/optimal): 512 bytes / 512 bytes

    Disk identifier: 0x00000000

     

    Disk /dev/xvdf doesn't contain a valid partition table

 

2.  Use the 'gdisk' utility to create a new Linux partition on the drive you find in Step #2 above. Print out the partition table and be sure to write it to disk before exiting 'gdisk'.

    root@tcox1:~# gdisk /dev/xvdf

    GPT fdisk (gdisk) version 0.8.8

     

    Partition table scan:

      MBR: not present

      BSD: not present

      APM: not present

      GPT: not present

     

    Creating new GPT entries.

     

    Command (? for help): p

    Disk /dev/xvdf: 2097152 sectors, 1024.0 MiB

    Logical sector size: 512 bytes

    Disk identifier (GUID): AE372F98-80BF-4F9F-84BB-B9D0F087124E

    Partition table holds up to 128 entries

    First usable sector is 34, last usable sector is 2097118

    Partitions will be aligned on 2048-sector boundaries

    Total free space is 2097085 sectors (1024.0 MiB)

     

    Number  Start (sector)    End (sector)  Size       Code  Name

     

    Command (? for help): n

    Partition number (1-128, default 1): 1

    First sector (34-2097118, default = 2048) or {+-}size{KMGTP}: 

    Last sector (2048-2097118, default = 2097118) or {+-}size{KMGTP}: 

    Current type is 'Linux filesystem'

    Hex code or GUID (L to show codes, Enter = 8300): 

    Changed type of partition to 'Linux filesystem'

     

    Command (? for help): w

     

    Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING

    PARTITIONS!!

     

    Do you want to proceed? (Y/N): y

    OK; writing new GUID partition table (GPT) to /dev/xvdf.

     

    The operation has completed successfully.

 

3. Format the partition as an 'ext3' filesystem. Give it a volume label of 'testpart'. Verify that a UUID has been created for it once it has been formatted.

    root@tcox1:~# mke2fs -t ext3 -L testpart /dev/xvdf1

    mke2fs 1.42.9 (4-Feb-2014)

    Filesystem label=testpart

    OS type: Linux

    Block size=4096 (log=2)

    Fragment size=4096 (log=2)

    Stride=0 blocks, Stripe width=0 blocks

    65536 inodes, 261883 blocks

    13094 blocks (5.00%) reserved for the super user

    First data block=0

    Maximum filesystem blocks=268435456

    8 block groups

    32768 blocks per group, 32768 fragments per group

    8192 inodes per group

    Superblock backups stored on blocks: 

    32768, 98304, 163840, 229376

     

    Allocating group tables: done                            

    Writing inode tables: done                            

    Creating journal (4096 blocks): done

    Writing superblocks and filesystem accounting information: done

     

    root@tcox1:~# ls -al /dev/disk/by-uuid/

    total 0

    drwxr-xr-x 2 root root  80 Sep  7 16:27 .

    drwxr-xr-x 6 root root 120 Sep  7 16:25 ..

    lrwxrwxrwx 1 root root  11 Sep  7 16:27 09f1cbe8-2a81-4d2f-b7c1-5181a506c6b4 -> ../../xvdf1

     

    lrwxrwxrwx 1 root root  11 Sep  7 15:52 a09befc1-cf11-45ac-b1f4-52736ff06125 -> ../../xvda1

 

4. Mount the drive using a directory called std' in the '/mnt' directory using the drive created in Step #3 above. Create a file called 'test.txt' in the newly mount partition and display it. 

    root@tcox1:~# cd /mnt

    root@tcox1:/mnt# mkdir std

    root@tcox1:/mnt# mount -t ext3 /dev/xvdf1 /mnt/std

    root@tcox1:/mnt# df -h

    Filesystem      Size  Used Avail Use% Mounted on

    /dev/xvda1       15G  2.4G   12G  17% /

    none            4.0K     0  4.0K   0% /sys/fs/cgroup

    udev            492M   12K  492M   1% /dev

    tmpfs           100M  804K   99M   1% /run

    none            5.0M     0  5.0M   0% /run/lock

    none            497M   80K  497M   1% /run/shm

    none            100M   16K  100M   1% /run/user

    /dev/xvdf1      991M  1.3M  939M   1% /mnt/std

    root@tcox1:/mnt# echo "Hello World" >> /mnt/std/test.txt

    root@tcox1:/mnt# cat /mnt/std/test.txt 

    Hello World

     

5. Unmount the partition. Verify that the drive is no longer mounted and that the file created in Step #4 is no longer there.

    root@tcox1:/mnt# umount std

    root@tcox1:/mnt# df -h

    Filesystem      Size  Used Avail Use% Mounted on

    /dev/xvda1       15G  2.4G   12G  17% /

    none            4.0K     0  4.0K   0% /sys/fs/cgroup

    udev            492M   12K  492M   1% /dev

    tmpfs           100M  804K   99M   1% /run

    none            5.0M     0  5.0M   0% /run/lock

    none            497M   80K  497M   1% /run/shm

    none            100M   16K  100M   1% /run/user

    root@tcox1:/mnt# ls -al /mnt/std

    total 8

    drwxr-xr-x 2 root root 4096 Sep  7 16:28 .

    drwxr-xr-x 3 root root 4096 Sep  7 16:28 ..