robsonj
Dabbler
- Joined
- Nov 21, 2015
- Messages
- 17
Hi There,
I currently have 3 drobo 4bay boxes and am gonna be migrating to a freeNAS solution in the next few weeks. I am new to FreeNAS so figured I would play around with it in VirtualBox first to get a feel for how it works and maintenance. My drive setup which will come from the drobos is a bit of a hodge podge, but basically...
2 x 4Tb WD Greens, 2 x 3Tb Seagate Barracudas, 2 x 2Tb Hitachi
My plan was to setup a mirrored vpool...
tank
|_4TB mirrored with 4Tb
|_3Tb mirrored with 3Tb
(may add the mirrored 2Tb drives later)
I figured this would give me ~7Tb of usable space, faster reads, reasonable failure protection and the ability to upgrade the drives in pairs.
In virtual box I created a bunch of virtual disks to play with, instead of 4Tb I created 4Gb drives, then 3Gb for the 3Tb etc etc.
I started in virtual box by creating...
tank
|_4Gb mirrored with 4Gb
I expected that would give me ~4Gb of usable space, but I ended up with 2Gb!
Did I do something wrong, or is my understanding of mirroring just wrong? Maybe its just overhead of ZFS, hence I may try a mirrored 40Gb virtual drive to see if its just ZFS overhead which is more noticeable on such small test drives.
Any help appreciated.
Cheers
Jonathan
I currently have 3 drobo 4bay boxes and am gonna be migrating to a freeNAS solution in the next few weeks. I am new to FreeNAS so figured I would play around with it in VirtualBox first to get a feel for how it works and maintenance. My drive setup which will come from the drobos is a bit of a hodge podge, but basically...
2 x 4Tb WD Greens, 2 x 3Tb Seagate Barracudas, 2 x 2Tb Hitachi
My plan was to setup a mirrored vpool...
tank
|_4TB mirrored with 4Tb
|_3Tb mirrored with 3Tb
(may add the mirrored 2Tb drives later)
I figured this would give me ~7Tb of usable space, faster reads, reasonable failure protection and the ability to upgrade the drives in pairs.
In virtual box I created a bunch of virtual disks to play with, instead of 4Tb I created 4Gb drives, then 3Gb for the 3Tb etc etc.
I started in virtual box by creating...
tank
|_4Gb mirrored with 4Gb
I expected that would give me ~4Gb of usable space, but I ended up with 2Gb!
Did I do something wrong, or is my understanding of mirroring just wrong? Maybe its just overhead of ZFS, hence I may try a mirrored 40Gb virtual drive to see if its just ZFS overhead which is more noticeable on such small test drives.
Any help appreciated.
Cheers
Jonathan