This article describes the procedures for increasing the data volume capacity for TurboTier R4 in a Linux environment. You can achieve this by either expanding an existing disk or adding a new physical disk to the Volume Group.
Prerequisites
Before modifying your storage configuration, ensure the following:
All TurboTier data is completely synced to the cloud.
Stop the TurboTier service by executing this command
service Druva-EnterpriseWorkloads stop
Option 1: Increase Data Volume by increasing the existing disk
The following workflow outlines the process for extending existing storage volumes in a Linux infrastructure.
Increase data disk size in VMware.
Navigate to the settings of your virtual machine in VMware.
Increase the size of the desired disk. For example, extend the disk by 1TB.
Connect to the Linux server
Use a terminal client like PuTTY to log in to the Linux server.
Verify current disk size and structure
Run the following command to check disk usage and structure:
lsblk: Displays disk usage and mounted partitions.
The Linux kernel maintains a cached view of block device geometries. Trigger a manual bus rescan to discover the new capacity without a reboot:
echo 1 | sudo tee /sys/class/block/sdb/device/rescanMove the partition boundaries to encompass the newly available sectors:
sudo growpart /dev/sdb 1Note: The default volume provided in the R4 TurboTier OVA is DOS formatted. It cannot be extended beyond 2 TB. If you require more than 2 TB, add an additional disk.
Synchronize LVM metadata with the new partition boundary:
sudo pvresize /dev/sdb1
Run the following command to allocate all unassigned space to the Logical Volume and resize the filesystem simultaneously:
lvm lvextend -r -l +100%FREE /dev/mapper/vg-lv
-l +100%FREE: Allocates all unassigned Extents in the Volume Group.-r (--resizefs): Invokes the filesystem-specific resize tool (e.g., resize2fs for ext4 or xfs_growfs for XFS) in a single atomic-like operation.
Confirm the new size using
lsblk.
Update the volume size in the Edit Volume section on the Enterprise Workloads Management Console.
Recommendation:
As a best practice, allocate 90% of the total physical volume size in the Druva User interface to prevent the volume from getting 100% full.
Example :1 TB default volume, and the recommended volume would be approximately 920 GB, for 2TB it will be ~1800 GB.
Option 2: Add an additional data disk (Recommended)
To add a new disk, initialize the hardware and incorporate it into the Volume Group (VG) to expand available capacity.
Shutdown the Virtual Machine
Power off the virtual machine before adding the new disk.
Attach a New Disk in VMware
Add a new virtual disk to the machine with the desired size (e.g., 400 GB).
Power on the Virtual Machine
Start the virtual machine and log in via SSH.
Identify the New Disk
Run the following command to identify the newly added disk:
lsblkExample output:
root@cloudcache:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
fd0 2:0 1 4K 0 disk
sda 8:0 0 64G 0 disk
├─sda1 8:1 0 55.9G 0 part /
├─sda2 8:2 0 8G 0 part [SWAP]
├─sda14 8:14 0 4M 0 part
└─sda15 8:15 0 106M 0 part /boot/efi
sdb 8:16 0 3T 0 disk
└─sdb1 8:17 0 2T 0 part
└─vg-lv 252:0 0 2T 0 lvm /mnt/data
sdc 8:32 0 500G 0 disk /mnt/data/vmac
sdd 8:48 0 400G 0 disk
sr0 11:0 1 1024M 0 rom
Initialize the new disk as a physical volume
Format the new disk for use with LVM:
pvcreate /dev/sdd
Extend the Volume Group
Add the new physical volume to your existing volume group:
vgextend vg /dev/sdd
Extend the Logical Volume
Allocate the free space to the logical volume and resize the filesystem:
lvm lvextend -l +100%FREE /dev/mapper/vg-lv -rThe
-rflag automatically resizes the filesystem.
Verify the New Size
Check the updated volume and filesystem size:
vgsorlsblk
Update the volume size in the Edit Volume section on the Enterprise Workloads Management Console.
Recommendation:
As a best practice, allocate 90% of the total physical volume size in the Druva User interface to prevent the volume from getting 100% full.
Example:1 TB default volume, and the recommended volume would be approximately 920 GB, for 2TB it will be ~1800 GB.
Example for Adding a 400 GB Disk
For a scenario where you’ve added a 400 GB disk (/dev/sdd):
Initialize the disk:
pvcreate /dev/sdd
Extend the volume group:
vgextend vg /dev/sdd
Extend the logical volume and resize the filesystem:
root@cloudcache:~# lvm lvextend -l +100%FREE /dev/mapper/vg-lv -r
Size of logical volume vg/lv changed from <2.00 TiB (524287 extents) to 2.39 TiB (626686 extents).
Logical volume vg/lv successfully resized.
resize2fs 1.46.5 (30-Dec-2021)
Filesystem at /dev/mapper/vg-lv is mounted on /mnt/data; on-line resizing required
old_desc_blocks = 256, new_desc_blocks = 306
The filesystem on /dev/mapper/vg-lv is now 641726464 (4k) blocks long.Verify the size:
vgs
OR
lsblk
