FreeNAS: Why are my files taking up so much space???

[jde3]

This is another way to get at that info.

diskinfo -v da1

[jde3]

So what to do about it....

 

I don't know what this is on but the devices show up as da's so that is kind of odd.. the slack problem would occur when the drive is writing 512b file and it takes up 4k space. meaning the disk must lie to the OS?

 

You can force this to write 4k with ashift 12 or 512b with ashift 9 - This is pretty advanced though and can impact the performance of the pool.

 

I would do 12 (4k) regardless of what the drive is telling you. If they are actually 512b physical this won't break anything.

 

The only way to do this is at pool creation time. It's basically the drives format so pretty much all filesystems are like this. the only way to do it is to reformat.

[jde3]

again zpool get all | grep ashift will tell you what it was set to when the pool was created so we can get to the bottom of this mystery.

12 = 4k

9 = 512b (I think, it's rarely used)

 

If that command returns nothing it means it's unset and prob 512b

 

(this is rare btw.. I've used zfs for 10 years and never seen it.. but again I always force ashift 12 also so.. hmm)

[TechyBen]

17 hours ago, grimreeper132 said:

just tried 512K finally a nice image

 

I beg to differ. There is nothing nice there. I mean, having 1 copy of Die Hard 4.0 is bad, but having 4 copies is unforgivable!

 

(Glad you got it sorted!)

[grimreeper132]

5 hours ago, TechyBen said:

I beg to differ. There is nothing nice there. I mean, having 1 copy of Die Hard 4.0 is bad, but having 4 copies is unforgivable!

 

(Glad you got it sorted!)

hey, it's not bad if you get it for free  

 

and yea so am I