Missing Space

[MichaelP]

Hi, I have a DS918+.
I initially had 4 drives in it : 2 drives of 8TB each and 2 drives of 4TB each.
I swapped out the 4TB drives one by one and let it rebuild.
SHR is my choice.
I have 21.8 TB of total capacity but only 15.74 showing. See these screenshots:

 

[Rusty]

What are the drives after swap? 4x8TB?

 

[MichaelP]

Hi Rusty, yes they are 4x8TB. I would think I would have 24TB (from the synology storage calculator), not the 15.7TB that I seem to have

-- post merged: 26. Jan 2021 --

Also, I thought that a DS918+ can get up to 108 TB for a max storage pool?

 

[fredbert]

One thought: did you create the Storage Pool and Volume using the DS918+ or did you used to have an earlier DSM NAS where they were created?

What is the maximum single volume size of my Synology NAS? - Synology Knowledge Center

Synology Knowledge Center offers comprehensive support, providing answers to frequently asked questions, troubleshooting steps, software tutorials, and all the technical documentation you may need.

www.synology.com

 

[jeyare]

First,
In the first screenshot - Overview - you can find that you don't have Total capacity: 24TB, but 21.8TB only

Second:
I would like to see output from these commands (SSH):

df -H --o

then

fdisk -l /dev/sda

then

vgdisplay

 

[MichaelP]

One thought: did you create the Storage Pool and Volume using the DS918+ or did you used to have an earlier DSM NAS where they were created?

What is the maximum single volume size of my Synology NAS? - Synology Knowledge Center

Synology Knowledge Center offers comprehensive support, providing answers to frequently asked questions, troubleshooting steps, software tutorials, and all the technical documentation you may need.

www.synology.com

Hi Fredbert - the old 4TB drives MIGHT have been from another NAS, I don't remember now.....

-- post merged: 26. Jan 2021 --

First,
In the first screenshot - Overview - you can find that you don't have Total capacity: 24TB, but 21.8TB only

Second:
I would like to see output from these commands (SSH):

then

then

silly question - is that from SSH on the NAS?

 

[Telos]

the old 4TB drives MIGHT have been from another NAS

This is the issue. You can create a second volume from the remaining storage pool capacity.

 

[MichaelP]

The option to create another volume is greyed out:

 

[jeyare]

silly question - is that from SSH on the NAS?

Y

 

[MichaelP]

First,
In the first screenshot - Overview - you can find that you don't have Total capacity: 24TB, but 21.8TB only

Second:
I would like to see output from these commands (SSH):

then

then

Hi Jeyare, I've enabled SSH but don't know how to get to the terminal. Sorry, this is way beyond what I normally do. I'm technical, but usually don't play at the root level or command prompts.....

 

[fredbert]

Launch Mac's Terminal application (in /Applications/Utilities). Then run command:

ssh nas_admin_name@nas_ip_address -p nas_ssh_port_number

e.g if your admin is 'nasadmin', the NAS at 192.168.1.100, and the SSH port is 1234

ssh [email protected] -p 1234

 

[Rusty]

the old 4TB drives MIGHT have been from another NAS, I don't remember now

Try and remember. If it is true then you might be looking at a 16TB limitation here. The pool is sized as it should be but usable volume might be due to its legacy, limited to 16TB.

 

[Telos]

The option to create another volume is greyed out

Does this help with creating a second volume...

Convert from a single-volume to a multiple-volume storage pool​

 

[MichaelP]

Does this help with creating a second volume...

Convert from a single-volume to a multiple-volume storage pool​

Hi Telos,

It doesn't actually. The option to convert is greyed out.
Kind of frustrating that I have 21.92TB of capacity as you can see but only xx.xx TB in a volume. First pic is from Storage Pool and the second is from Volume.
Is there no way to get the extra back without somehow moving to ANOTHER NAS that I don't have?
Cheers, Michael

-- post merged: 21. Feb 2021 --

Launch Mac's Terminal application (in /Applications/Utilities). Then run command:

ssh nas_admin_name@nas_ip_address -p nas_ssh_port_number

e.g if your admin is 'nasadmin', the NAS at 192.168.1.100, and the SSH port is 1234

ssh [email protected] -p 1234

Hi, I just got back home where my NAS is. I tried this and this is what I got back:
ssh_dispatch_run_fatal: Connection to 192.168.68.1 port 22: Invalid key length


michael@18mpeck ~ %

 

[MichaelP]

First,
In the first screenshot - Overview - you can find that you don't have Total capacity: 24TB, but 21.8TB only

Second:
I would like to see output from these commands (SSH):

then

then

Hi Jeyare, sorry about the delay but I was away from the NAS for quite a while. I managed to get in, and this is what I got to see from the commands you wanted:

Filesystem Type Inodes IUsed IFree IUse% Size Used Avail Use% File Mounted on


/dev/md0 ext4 156k 42k 115k 27% 2.5G 1.1G 1.3G 48% - /


none devtmpfs 483k 1.2k 482k 1% 2.0G 0 2.0G 0% - /dev


/tmp tmpfs 484k 226 484k 1% 2.0G 5.5M 2.0G 1% - /tmp


/run tmpfs 484k 1.2k 483k 1% 2.0G 11M 2.0G 1% - /run


/dev/shm tmpfs 484k 4 484k 1% 2.0G 13k 2.0G 1% - /dev/shm


none tmpfs 484k 10 484k 1% 4.1k 0 4.1k 0% - /sys/fs/cgroup


cgmfs tmpfs 484k 8 484k 1% 103k 0 103k 0% - /run/cgmanager/fs


/dev/vg1000/lv ext4 1.1G 1.6M 1.1G 1% 18T 3.1T 15T 18% - /volume1


Michael@PeckDS918:~$ fdisk -l /dev/sda


fdisk: cannot open /dev/sda: Permission denied


Michael@PeckDS918:~$ vgadisplay


-sh: vgadisplay: command not found


Michael@PeckDS918:~$

I hope this means something to you: