× NETGEAR will be terminating ReadyCLOUD service by July 1st, 2023. For more details click here.
Orbi WiFi 7 RBE973
Reply

Volumes not showing expected free space

SERPCOM
Aspirant

Volumes not showing expected free space

So I'm a bit new.

 

I have a Netgear NAS 426 with 2, 4TB drives, I would expect free space to show somewhat less than 8TB. But it shows less than 4.

 

Why?

 

I'm guessing that it's storage for redundancy?

 

So if I want ~8TB of free storage space, I need 4, 4TB drives?

 

Please help, thanks.

 

Message 1 of 3

Accepted Solutions
StephenB
Guru

Re: Volumes not showing expected free space


@SERPCOM wrote:

So I'm a bit new.

 

I have a Netgear NAS 426 with 2, 4TB drives, I would expect free space to show somewhat less than 8TB. But it shows less than 4.

 

Why?

 

I'm guessing that it's storage for redundancy?

 

So if I want ~8TB of free storage space, I need 4, 4TB drives?


With single disk RAID redundancy, the capacity rule is "Sum the drives and subtract the largest".  So 2x4TB will give you 4 TB of storage. The NAS reports this in TiB (1024*1024*1024*1024 bytes), not TB (1000*1000*1000*1000 bytes).  4 TB is the same as 3.64 TiB.

 

3x4TB would give you 8 TB (~7.28 TiB).

View solution in original post

Message 2 of 3

All Replies
StephenB
Guru

Re: Volumes not showing expected free space


@SERPCOM wrote:

So I'm a bit new.

 

I have a Netgear NAS 426 with 2, 4TB drives, I would expect free space to show somewhat less than 8TB. But it shows less than 4.

 

Why?

 

I'm guessing that it's storage for redundancy?

 

So if I want ~8TB of free storage space, I need 4, 4TB drives?


With single disk RAID redundancy, the capacity rule is "Sum the drives and subtract the largest".  So 2x4TB will give you 4 TB of storage. The NAS reports this in TiB (1024*1024*1024*1024 bytes), not TB (1000*1000*1000*1000 bytes).  4 TB is the same as 3.64 TiB.

 

3x4TB would give you 8 TB (~7.28 TiB).

Message 2 of 3
SERPCOM
Aspirant

Re: Volumes not showing expected free space

I was thinking something like that...

 

Thanks.

 

Message 3 of 3
Top Contributors
Discussion stats
  • 2 replies
  • 801 views
  • 1 kudo
  • 2 in conversation
Announcements