Hp ML110 G6 and FreeNAS

[titisk]

Hello from Greece

I have purchased an HP ML110 G6 server and i am planning to use it as a file server for my windows network.
I also purchased 4 x 2 TB WD HDD an my plans is to use them for RAID 1+0,
I also installed 8gb dd3 1333 Ram
FreeNas is to be installed on a usb memory stick 4gb


Hp ML110 G6 has an on-board Raid controler (B110i) that gives you the ability to perform raid 0,1,1+0

i succesfully installed freeNas but i realized that it doesent recognizes the b110i and it sees 4 drives allthough the onboard raid controller is enabled.

From the storage section of freenas i created a ZFS volume and created a Raid z2 that gives me a total of 3,5 Terrabytes.

So Here is My Questions :

should the onboard raid left enabled along with zfs or i must change the setting to ahci and disable the onboaard raid controller?

what is the best practice?

is Raid Z2 similar to raid 1+0 ? if i 2 hdd drives FAIL the raidz2 will still persist ?

swap size is set to 2 should i change it ?

thanks in advance

 

[William Grzybowski]

should the onboard raid left enabled along with zfs or i must change the setting to ahci and disable the onboaard raid controller?

I'd recommend change it to AHCI and disable onboard.
ZFS likes to have direct access to the disks and this makes things easier, specially with freenas.

is Raid Z2 similar to raid 1+0 ? if i 2 hdd drives FAIL the raidz2 will still persist ?

It is more like raid6, in the sense that 2 hdd can fail (any of them)

swap size is set to 2 should i change it ?

The dafault is fine

 

[titisk]

thanks for your reply !

i changed the bios setting to ahci, so that the zfs can direct manage the disks!

i have copied about 100 gbytes of data for testing issues and here is what happens:

after finished copying...

i unplugged 1 of my 4 drives to test the raidz efficiency and then got the message:

(ada0:ahcich0:0:0:0): Lost Device

i could still see my data all was working fine...

but once i reconnected the drive back i got the following messages:


(ada1:ahcich1:0:0:0): Lost Device

(ada2:ahcich2:0:0:0): Lost Device

(ada3:ahcich3:0:0:0): Lost Device

and my data is no more browsable

i check the storage tab
and in the view disks tab all my drives are marked as unknown

i perform a reboot and system hungs up
and then i perform a hard reset
and when my system is back online everything is working fine (my data is browsable again) and my drives are shown again

is that normal ??
did i missed some part of the initial configuration ??
i thought that if i reconect the drive it should start rebuilding raid ??
i think that maybe i am experiencing a bug here. my version is 8.0.2.release amd64(8288)

 

[William Grzybowski]

Yes, this seems like a bug.
FreeBSD probably cannot deal with your raid controller very well (hot-swap)

 

[titisk]

is there something i can do to deal with it ?


p.s. my onboard raid controller is disabled