Hi all. I’m new to the forum and new to FreeNAS. I have a questions about FreeNAS diskspace overhead.
I’m trying to build a new storage server with FreeNAS-9.2.1.5-RELEASE-x64 (80c1d35) to replace our existing Windows 2008 Storage server Essential. I’m building it with an HP DL180 G6 with an LSI SAS9211-8i adapter flashed with 19.00-IT firmware.
I have 8 x 4TB SATA drives that I want to create a volume as a VM datastore for a couple of VMware ESXi 5 hosts. The ESXi hosts and the FreeNAS server will be connected via 10G network.
FreeNAS is running off an 8GB USB flashcard. We’re planning to use RaidZ2.
When I try to create a volume with the 8 drives with RaidZ2, I got available Capacity: 14.55 TiB
That doesn’t seem right. 8 x 4 = 32 TB Total minus two parity 2x4 = 8. Avaiable space should be 24 TB minus some overhead FreeNAS reserved for swap and such. However instead of something a little less than 24TB what seems to be available was 14.55 TB.
How could this be? That’s a LOT of overhead if that was the case.
When I limit the volume to use 6 disks, the setting changes to RaidZ and the capacity remain at 14.55 TiB.
Is 14.55 TB some sort of limit for FreeNAS? I don’t see that mentioned anywhere.
Does anyone have any insights on this?
Thank you.
I’m trying to build a new storage server with FreeNAS-9.2.1.5-RELEASE-x64 (80c1d35) to replace our existing Windows 2008 Storage server Essential. I’m building it with an HP DL180 G6 with an LSI SAS9211-8i adapter flashed with 19.00-IT firmware.
I have 8 x 4TB SATA drives that I want to create a volume as a VM datastore for a couple of VMware ESXi 5 hosts. The ESXi hosts and the FreeNAS server will be connected via 10G network.
FreeNAS is running off an 8GB USB flashcard. We’re planning to use RaidZ2.
When I try to create a volume with the 8 drives with RaidZ2, I got available Capacity: 14.55 TiB
That doesn’t seem right. 8 x 4 = 32 TB Total minus two parity 2x4 = 8. Avaiable space should be 24 TB minus some overhead FreeNAS reserved for swap and such. However instead of something a little less than 24TB what seems to be available was 14.55 TB.
How could this be? That’s a LOT of overhead if that was the case.
When I limit the volume to use 6 disks, the setting changes to RaidZ and the capacity remain at 14.55 TiB.
Is 14.55 TB some sort of limit for FreeNAS? I don’t see that mentioned anywhere.
Does anyone have any insights on this?
Thank you.