Christopher Juckins

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==== Adding a Second Hard Drive to Linux Machine ====

__31 December 2023 - 4TB SSD Hard Drive on NUC 13 Pro Kit running Rocky Linux 9.3__
  * Install gparted RPM
  * Start up gparted as root
  * Select the /dev/sda disk using the pull-down menu in the upper right corner
    * Note that the primary disk is /dev/nvme0n1
  * Device > Create Partition Table...
    * Choose the default 'gpt'
  * Partition > New
    * Select defaults except for the following:
      * Partition name: disk2
      * Label: disk2
      * File system: ext4
    * Click Add
  * Click green check mark to Apply All Operations
  * Open an xterm as root
  * mkdir /disk2
  * You need to modify the /etc/fstab entry to something like the following
    * ''UUID=XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX /disk2                  ext4     defaults        1 1''
  * You find the UUID for the new hard disk by going to ''/dev/disk/by-uuid/'' and doing ''ls -l''
  * There you will see the UUID pointing to the drive (ex. ../../sda)
  * Use that information to update ''/etc/fstab''
  * ''systemctl daemon-reload''
  * ''mount -a''
  * ''df -hP''
    * Ensure you see /disk2 mount and you can cd in and touch/remove a test file
  * Reboot to ensure disk mounts correctly


__19 April 2016 - 3TB Hard Drive on CentOS 6__

See [[http://www.tech-g.com/2012/07/25/installing-my-3tb-hard-drive-on-debian-linux-step-by-step/|Installing 3TB Hard Drive on Debian]]

  * Couldn't use default partition scheme (2 TB is largest supported disk)
  * Had to make a new partition using the GUI application GParted in format 'gpt'

----

Follow the instructions on this page.  But if you are using SATA drives, replace "hdb" with "sdb" and "hdb1" with "sdb1", etc. 

[[http://www.yolinux.com/TUTORIALS/LinuxTutorialAdditionalHardDrive.html]]

For newer hardware, see [[http://go2linux.garron.me/linux/2010/09/uuid-linux-fstab-file-766]] for UUID information.

[[https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Storage_Administration_Guide/persistent_naming-uuid_and_others.html | Mounting a hard drive with UUID in /etc/fstab]]


----

4 July 2015 Notes

Backup any important files

vi /etc/fstab to remove old HDD entry first
Remove/replace drive.
Boot.

Use rescue mode if you forgot to undo /etc/fstab
RHEL6 rescue mode: 

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Deployment_Guide/ch-System_Recovery.html#sec-Rescue_Mode

vi /etc/fstab to remove old HDD entry.

Reboot, get this prompt:

SELinux relabeling required. 
 
Note, each * is 1000 files that have been relabeled

http://www.linuxforums.org/forum/red-hat-fedora-linux/161383-solved-boot-failure-after-latest-kernel-update-fed-12-a.html

Relabeling took 18 minutes on a 250MB primary drive 87% full.  Not sure how many files it had.

Partition the new drive:

http://www.techotopia.com/index.php/Adding_a_New_Disk_Drive_to_an_RHEL_6_System

<code>
[root@localhost: /dev/disk]# fdisk /dev/sdf

The device presents a logical sector size that is smaller than
the physical sector size. Aligning to a physical sector (or optimal
I/O) size boundary is recommended, or performance may be impacted.

WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
         switch off the mode (command 'c') and change display units to
         sectors (command 'u').

Command (m for help): c
DOS Compatibility flag is not set

Command (m for help): u
Changing display/entry units to sectors

Command (m for help): p

Disk /dev/sdf: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x0000f111

   Device Boot      Start         End      Blocks   Id  System

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
p
Partition number (1-4): 
Value out of range.
Partition number (1-4): 1
First sector (2048-3907029167, default 2048): 
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-3907029167, default 3907029167): 
Using default value 3907029167

Command (m for help): p

Disk /dev/sdf: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x0000f111

   Device Boot      Start         End      Blocks   Id  System
/dev/sdf1            2048  3907029167  1953513560   83  Linux

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
[root@localhost: /dev/disk]# 
</code>

Format the new drive:
  * Open up Applications > System Tools > Disk Utility 
    * Note for CENTOS7 you need to install gnome-disk-utility
    * Then run: gnome-disks
    * Upper right hand corner has the link to view SMART data
  * See Storage Devices on left side of GUI
  * Click on the new hard drive
  * Should see new partition
  * Click Format Volume
  * Give it a label, use default (ext4)

Update /etc/fstab with drive UUID in /dev/disk/by-uuid

mount -a

Reboot as final test.