Start the hdd before installing TrueNas? and some more question.

[Kenzox13]

Hello everyone
I have some doubts before installing TrueNas which are:
- Do I have to start the hhd before installing TrueNas? or I can do it once TrueNas is installed. (Installed on internal USB)

- I'm going to use Raid 5 with 3 HDDs, do I have the possibility to add HDDs later to the same system? In the mime Jail

Thanks and sorry for my English ...

 

[Patrick M. Hausen]

1. What do you mean by "start hdd"? If they are mounted in your system and connected, they will probably start up just fine the moment you hit the power button.
2. There is no RAID5 in TrueNAS. There are various levels of redundancy in ZFS, either 2-way or 3, ... n-way mirrors or RAIDZ. RAIDZ comes in flavours RAIDZ1, RAIDZ2, RAIDZ3. The number indicates how many drives you can lose without losing all your data. With current disk drive sizes RAIDZ1 is not recommended anymore, because there is a probability greater than zero of another drive failure during rebuild. If you have space for 4 drives in this system, consider using RAIDZ2.
3. You can add another group of 3 (or 4 as recommended) drives later to expand your pool with another vdev but you cannot add a single drive for "more capacity". Adding another 3 to 4 drives of the same size will double your capacity of course.
4. What do you mean by "In the mime Jail"?

Kind regards, hope this helps,
Patrick

 

[Kenzox13]

1. What do you mean by "start hdd"? If they are mounted in your system and connected, they will probably start up just fine the moment you hit the power button.
2. There is no RAID5 in TrueNAS. There are various levels of redundancy in ZFS, either 2-way or 3, ... n-way mirrors or RAIDZ. RAIDZ comes in flavours RAIDZ1, RAIDZ2, RAIDZ3. The number indicates the how many drives you can lose without losing all your data. With current disk drive sizes RAIDZ1 is not recommended anymore, because there is a probability greater than zero of another drive failure during rebuild. If you have space for 4 drives in this system, consider using RAIDZ2.
3. You can add another group of 3 (or 4 as recommended) drives later to expand your pool with another vdev but you cannot add a single drive for "more capacity". Adding another 3 to 4 drives of the same size will double your capacity of course.
4. What do you mean by "In the mime Jail"?

Kind regards, hope this helps,
Patrick

As you said above, my English is pathetic ... Besides mixing names or concepts ... I said Jail when I was referring to "pool" And yes, I mixed concepts from raid 5 with raidZ of truenas.


Regarding starting hdd ", in context I don't know how to say ... Let's see if by explaining a little you can understand it ...
I have 3 totally virgin HDDs, never used. If for example if in windows I want it to be recognized I have to "activate" these and then format.

WHAT if these HDDs is necessary to do that process for truenas or from itself it can be done without problem.


I have been practicing with 3 HDDs in true nas to see what the system is like and practice a little before using everything again. And if I remember correctly I have used RAidz3 (none were of the same capacity) but it was worth it to test.

At the moment I start with 3 HDD I suppose that if one is damaged I can replace it.

And if I have not understood you wrong, if I want to add more HDD later it is better to put 2, 3 or 4 hhd in another vdev


I am currently reading all the information regarding truenas raidz

ZFS Pools

How to create a ZFS data storage pool.

www.truenas.com

 

[Patrick M. Hausen]

Regarding starting hdd ", in context I don't know how to say ... Let's see if by explaining a little you can understand it ...
I have 3 totally virgin HDDs, never used. If for example if in windows I want it to be recognized I have to "activate" these and then format.

You can just create a pool from these hard disks in the UI. No special action necessary. I don't remember anything in Windows, either. There's this storage manager thingy in MSC and then you just create partitions and format ... but ok.

I have been practicing with 3 HDDs in true nas to see what the system is like and practice a little before using everything again. And if I remember correctly I have used RAidz3 (none were of the same capacity) but it was worth it to test.

You cannot use RAIDZ3 with just 3 hard disk so your memory might fail you.

At the moment I start with 3 HDD I suppose that if one is damaged I can replace it.

Again, better start out with four so you have two disks of redundancy. But RAIDZ1 will work, no fundamental impediment, here. Just risk/cost considerations.

And if I have not understood you wrong, if I want to add more HDD later it is better to put 2, 3 or 4 hhd in another vdev

The new vdev should have the same layout as the existing one if you extend your pool. So consider the layout (RAIDZ1/2/3) cast in concrete unless you do a full backup and recreate everything.

 

[Kenzox13]

If from what I have read the best option is RaidZ1
All understood, thank you very much.

 

[Patrick M. Hausen]

The best option is getting a fourth disk and using RAIDZ2.

 

[Kenzox13]

The best option is getting a fourth disk and using RAIDZ2.

The best option is getting a fourth disk and using RAIDZ2.

So, if there are 4 HDDs of 2TB each, will I have 4TB to store?

 

[Patrick M. Hausen]

So, if there are 4 HDDs of 2TB each, will I have 4TB to store?

Yes.