hi ,

i'm new to freenas. I have to build a storage server with 2 TB internal hdd for both ESX and samba share for users. MY DOUBT AND NEED HELP FOR IS

or

please tell me ... if freeNAS is good which is the latest stable one.

i'll install FreeNas on 80Gb hdd and connect 2TB hadd for storage. please tell me, i don't have much time, please help me.

i'm really thank you very much.

No, if you install freenas on the 80gb harddrive, your data on there will not be able to be recovered, please back it up or be prepared for it to be erased.
Another issue is that the freenas system only requires 2gb and 80gb will pretty much be useless. I suggest you can get a 4gb sd or cf card so that the 70gb+ dont get wasted. I am still playing around with it, but I am having difficultty in saving configurations. I wonder if it is just me or the system.

Uh, what? No, it will NOT be useless. You might want to read up a little bit on partitioning hard disks. Partition a few gigs for the OS, and put the remainder on a mount point in the file system.

This is going to be like any other computer. If the OS is corrupted, you might be able to recover the data by booting from a different source like a DVD or USB stick. Also look into paritioning. If you keep the OS in its own partition, and data elsewhere, re-installing the OS to the OS partition will NOT touch the data, and you should be good to go (provided there isn't a hardware failure).

Lastly, since this is a NAS, you are going to want to have a backup solution in place.

From what I read NFS is still faster than ISCSI. I am sure some dedicated hardware could prove me wrong. One might choose ISCSI for other reasons.

Not sure there is any normal centos way. It is up to the admin to choose or change as needed.

Raid and even zfs could be used but backup plans tend to have more than a single plan or failure point. They use multiple ways to protect data. Use at least one plan or more to prevent data loss.