Just been reading about ZFS and much other stuff(and they reckon I'm only 11% Geek! :p)
Anyhow, just read an interesting snippet about GRUB.
As you have reached 'GRUB Rescue' it seems that the GRUB version on the FreeNAS iso is GRUB v2.
What I also read somewhere about creating a GRUB bootloader USB stick .. was that if you have multiple file system types it can throw this same error.
Going by the images you provided in the first few posts, I'm assuming that the other USB drive is formatted FAT32 as well(this should be where FreeNAS is getting installed).
Makes no difference what file system is used, as the install routine formats it to (what I assume is ZFS) .. as well as eventually formatting HDDs as ZFS too).
This is why I 'lost' my USB stick after my quick trial. It got formatted on the whole as ZFS(ie. other) file system with a very small 300kb fat partition too.
So the other USB stick is formatted FAT32 and the other HDDs are formatted (?).
Maybe try disconnecting all the other HDDs just for now and have only the USB CD ROM and USB stick as the only two connected storage devices. Just to avoid any confusions for now.
BTW: The Geeky info I've just been reading up on is this info about booting from ISO images using GRUB
If I'm not mistaken, I'm reading that as(and example).
You load the FreeNAS .iso file directly onto a drive(eg.HDD0). No need to burn it extract it or nothing .. just place the .iso file on the HDD.
Create a GRUB bootloader on a USB stick(ie. a GRUB stick).
Boot computer using the GRUB stick, and point it to the .iso file on the HDD0.
You should get either another boot up menu(GRUB again but this time for the FreeNAS install) or possibly FreeNAS install itself.
anyhow .. back to your issue.
(fd) could be a floppy drive :confused:
All the info I've read about filesystem errors in GRUB relate to errors in GRUB itself, and the fix is to do a GRUB update.
Problem is it being on a CD .. can't fix that.
ps. was the cd burn routine closed? An open session(ie. not finalised can produce file system errors).
Is the Cd an 'RW' type or a single use type?
ps. learning stuff is OK. I just learned what Gsata is.
Is this a Gigabyte(only) thing?
I now have a Gigabyte M/board now(after years of ASUSes) and can't remember seeing anything about GSATA.
pps. I also learned that those Gsata ports can be slow, eg. if they use some specific thirdparty controllers.
1. if you do want to use RAID of any type, be sure not to mix'n'match those controllers with any of the others. Differences in read/write speeds can be detrimental .. so if you do raid, be sure to keep those two ports in a singular pair group .. away from the other ports
2. If they turn out to be of JMicron origin .. burn the motherboard! .. NOW!! :p
They will drive you to suicide in no time :p
Marvel may be crap, Via can be garbage, ASMedia can be OK ... but JMicron controllers are so despicably diabolical, they have the power to drive the devil to suicide!
.... you have been warned! :D

