Adding a second RAID controller to an existing system

[modellermark2]

Hi All, I hope this is a straightforward matter to solve :)
I run Freenas 9.10 (uprading makes me nervous but i know i need to do it) on a Dell Poweredge T20 intel box with 4 x 4TB internal SATA drives with the Freenas O/S runing on a USB stick.
It has worked happily for year and i just have a NFS share that holds everything and oly the Plex plugin (i need to upgrade Freenas to upgrade the plugin so i will do it soon.
As i have a disk issue at the moment i am about to replace a disk so while shut down I thought i would pop my new SAS RAID controller in as i plan to add an external shelf to increase the capacity of the system so it would be installed ready. It is a PCI-e LSI 500605b with 2 external SAS ports.
When i powered back up i was greeted with the message that all of the disks in my previous configuration has gone and i should check my cables - even though i could see them on the screen as it checked the internal RAID card before getting to the LSI card.
I shutdown, removed the new card and it booted fine so i assume the SCSI ID's or something change when the new card is in the system.
Is there a quick and easy way to work around this so that it boots normally with the new card in?
I am guess ing it will have a similar issue when i eventually connect the new disk shelf to the new SAS card too?
Thanks for any advice
Mark

 

[sretalla]

The MEGARAID line from LSI is not good for use with FreeNAS.

You should avoid installing that controller and rather us an HBA card, see the hardware recommendation section in the resources section of this forum.

 

[modellermark2]

Thanks for the quick reply - i will do some more research then as it matched the disk shelf i was planning to use. I will see what the shelf also supports to make sure any of it is going to work for me.
Thanks again