Storage size question

Hi there


I am new to Linux and configuring partitions in Linux.

My question is about partition sizes.

Not sure if this has been already been addressed elsewhere in this forum, I couldn't find specific article relating to this.


I cannot seem to create > 1.6TB partitions
I am setting up a new PVE with multiple arrays.

PVE version 3.1-21
Physical storage is as follows:
· 1x Adaptec 7805Q

· 2x SSD (RAID 1 - PVE installation - BOOT)
· 6x 2TB HDD (RAID 10 on 4x 2TB for VM-DATA plus 2x spare – DATA ONLY)


The RAID 10 VM data array has a total of just under 4TB capacity.

The steps so far:
1. Partitioning : cfdisk /dev/sdb (primary, Size (in MB): 3994319.59)

2. Formatting: mkfs.ext4 /dev/sdb1

3. Phys Volume : pvcreate /dev/sdb1

4. Vol Group: vgcreate localdisk2 /dev/sdb1

5. Added storage in PVE console

· LVM “VM-DATA” using localdisk2

Once created the still empty VM-DATA LVM type storage is showing only a size of 1.63TB instead of the expected 3.9TB


Not sure if there is a partition size limit in Debian / PVE .

I would like to utilize the full 3.9TB in a single partition.

What am I doing wrong?
Has anyone any advice on this?

Thanks in advance.