Why am I losing 4TiB?

[psychickitten]

Hey all, noticed that I seem to be missing 4TiB in my backup freenas server.

it has 6x 8TB drives in RaidZ1, and it doesn't seem like the space is being taken up by snapshots.

I'm wondering what's causing this space discrepancy. My main server (with mirrored Vdevs), only has a 1TiB difference.

 

[Jailer]

What is the output of zpool status

 

[psychickitten]

r

Code:

oot@freenas2:~ # zpool status
  pool: TANK
state: ONLINE
  scan: scrub repaired 0 in 14h0m with 0 errors on Tue Aug 15 18:00:58 2017
config:

  NAME  STATE  READ WRITE CKS  UM
  TANK  ONLINE  0  0  0
  raidz1-0  ONLINE  0  0  0
  gptid/813f38f3-56e7-11e7-9fae-7085c2392a57  ONLINE  0  0  0
  gptid/81f1e09c-56e7-11e7-9fae-7085c2392a57  ONLINE  0  0  0
  gptid/82a36489-56e7-11e7-9fae-7085c2392a57  ONLINE  0  0  0
  gptid/836345b0-56e7-11e7-9fae-7085c2392a57  ONLINE  0  0  0
  gptid/841a659d-56e7-11e7-9fae-7085c2392a57  ONLINE  0  0  0
  gptid/84d841b9-56e7-11e7-9fae-7085c2392a57  ONLINE  0  0  0

errors: No known data errors

  pool: freenas-boot
state: ONLINE
  scan: scrub repaired 0 in 0h0m with 0 errors on Thu Jul 27 03:45:50 2017
config:

  NAME  STATE  READ WRITE CKSUM
  freenas-boot  ONLINE  0  0  0
  da0p2  ONLINE  0  0  0

errors: No known data errors
root@freenas2:~ #

 

[Ericloewe]

Hey all, noticed that I seem to be missing 4TiB in my backup freenas server.

What makes you say that? 14.4TB vs 10.4TB? If so, that's because the 14.4TB are raw, across all drives. The 10.4TB is after RAIDZ parity is taken into account.

 

[psychickitten]

What makes you say that? 14.4TB vs 10.4TB? If so, that's because the 14.4TB are raw, across all drives. The 10.4TB is after RAIDZ parity is taken into account.

Oh, that would make sense. Do you see something similar in your volumes list as well?

 

[Ericloewe]

Yes, that is how it works.

(6x 3TB RAIDZ2)

 

[psychickitten]

Thanks for your help!