Don't need the battery for RAID1. Tends to be used for RAID5+.
You can set up the P410 as a JBOD. This way it will just present the drives through to the OS as if they were normal dumb drives. That kind of defeats the point of having the P410 in the first place though.
Moving this to the Servers section and there will be more people in there with experience of this raid card as it's common in vintage Proliant servers.
I don't understand what you are trying to achieve. Yes, if you RAID 1 (mirror) the drives, they will show as one big drive in FreeNAS. Why would you want to mirror in FreeNAS when you have a hardware RAID card that can do it for you?
Are you actually trying to do RAID for data protection or do you just want the drives to be dumb drives?
Is FreeNAS a VM? What hypervisor are you using, ESXi? You can do RAW disk maps in ESXi to either a dumb disk set up as a JBOD or to a logical disk on the P410. Just not sure what it is you are trying to achieve.
As you have a Hardware RAID controller you'd be mad to just use it for JBOD, only to then RAID the disks in software.
Setup your drives in RAID1 on the controller and format it as a datastore in ESXi.
Then just add a standard vm disk to your freenas box housed on that datastore - don't worry about adding any additional RAID levels in FreeNAS.
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Also, there is no issue running SATA3 drives on a SATA2 controller, they will just run at a maximum 3Gb/s as opposed to 6Gb/s
You could do that, but I don't know that I'd bother. I think you're best to just format it as a datastore and use it in VMWare natively.I guess when i setup the array on p410. i can just add the disk via raw disk mapping on freenas vm and voila
I can't imagine why it wouldn't work, I've used a P410 with SATA3 HDD's and it was fine. The fact it's SSD's shouldn't matter.Just lastly the ssd issue, I assume this controller is fine and works with ssds and same principle applies if they are sata2 or sata3
You could do that, but I don't know that I'd bother. I think you're best to just format it as a datastore and use it in VMWare natively.
We use RDM's at work for the additional benefits Microsoft Clustering gives us, I can honestly think of no other use cases that RDM's make sense over VMDK's.
Without the battery you have no write cache, and the SmartArray disables the write caches on the drives themselves, so your write speeds will be abysmal.
I have a P410, and that command doesn't work *until* you have a battery. It's silly. They don't allow you to re-enable the drive cache until you have a battery, when there is less need for enabling the drive cache.There is a hpacucli command for disabling this check, although I can't think of it off the top of my head
How much does a battery for the card cost anyhow?
Running a NAS on top of ESXi on top of a RAID card, kinda defeats the point of going for FreeNAS (and presumablyZFS). Unless there is a noticable performance benefit, you could just let FreeNAS do the mirroring. Wouldnt be difficult to load an ESXi box, attach the drive and retreive the VMDK if you needed to - ESXi can be run off a USB stick.
EDIT: Obviously run the different VMDKs off different physical disks