TRUENAS SCALE AND RAID 1

[RMAZOUZI]

Hello we are planning to deploy truenas scale on HP Z220
For miroring du operating system and boot wich is the recommended option setup recommended set up raid 1 on bios setup or from the trunas mirroring boot

 

[Samuel Tai]

Please remove any RAID controller from your server, and replace it with an HBA.

What's all the noise about HBA's, and why can't I use a RAID controller?

This is relevant to FreeNAS and TrueNAS CORE. Some parts of it might also be relevant to Scale, but I don't really know how reliable the Linux drivers are. 1) An HBA is a Host Bus Adapter. This is a controller that allows SAS and SATA devices to be attached to, and communicate directly with...

www.truenas.com

 

[Arwen]

Hello we are planning to deploy truenas scale on HP Z220
For miroring du operating system and boot wich is the recommended option setup recommended set up raid 1 on bios setup or from the trunas mirroring boot

TrueNAS SCALE or CORE never wants BIOS setup RAID. Always use TrueNAS for any RAID function, like Mirroring your boot pool.

 

[Davvo]

There is a single exception:

Highly Available Boot Pool Strategy

I've pounded a few versions of this out over the years, but I hate explaining over and over. TrueNAS allows a ZFS boot mirror pool to be created to increase the reliability of the NAS. This sounds great in theory, but there's a flaw. Due to...

www.truenas.com

 

[Arwen]

There is a single exception:

Highly Available Boot Pool Strategy

I've pounded a few versions of this out over the years, but I hate explaining over and over. TrueNAS allows a ZFS boot mirror pool to be created to increase the reliability of the NAS. This sounds great in theory, but there's a flaw. Due to...

www.truenas.com

Yes, I thought of adding that caveat. But, for new users that is more on the complex side, (and perhaps adding confusion).


We even did that 3 disk boot pool at Sun Microsystems with Solaris. We had 2 drives in a IR RAID-1 as the primary boot, with a 3rd drive as the secondary boot software Mirror. This allowed us to use broken Mirror OS software updates, with 100% back out plan to 3rd drive if we needed it. (And using 2 drives in IR RAID-1 meant that our upgraded OS was not at risk of data loss.)

However, this was right around Solaris 10's integration of ZFS. So the new method of OS updates using ZFS dataset snapshots did not yet exist.

 

[RMAZOUZI]

Thanks to you all for your suggestions