Does OMV support LSI SAS Cards with Snapraid and MergeFS?

You won't have any problems with SnapRAID and Mergerfs with a SAS card.

I can't say anything about the cards you are considering and the available PCI slots you have available on your motherboard. I would use the LSI 9240-8i card if you have a slot for it.

If you use SATA disks only, and don't care about HW RAID capabilities, there are cheap SATA/M.2 PCIe expansion cards from various European companies, like Axagon (www.axagon.eu). I have a few of their cards, and they all work well with no issues.

PCES-SA6 (6x SATA)

PCES-SA4X4 (4x SATA)

PCES-SA4M2 (2x SATA + 2xM.2 SATA)

PCEM2-ND (2xM.2 NVMe)

Granted, there are no 8-port versions like in your case.

Can't say anything about ASM1064 chip, but ASM1062 works fine in one of my machines (two controllers) under OMV 6.4.3-1.

lspci -v 

... 
01:00.0 SATA controller: ASMedia Technology Inc. ASM1062 Serial ATA Controller (rev 02) (prog-if 01 [AHCI 1.0])
    Subsystem: ASMedia Technology Inc. ASM1062 Serial ATA Controller
    Flags: bus master, fast devsel, latency 0, IRQ 28
    I/O ports at e050 [size=8]
    I/O ports at e040 [size=4]
    I/O ports at e030 [size=8]
    I/O ports at e020 [size=4]
    I/O ports at e000 [size=32]
    Memory at f7e10000 (32-bit, non-prefetchable) [size=512]
    Expansion ROM at f7e00000 [disabled] [size=64K]
    Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit-
    Capabilities: [78] Power Management version 3
    Capabilities: [80] Express Legacy Endpoint, MSI 00
    Capabilities: [100] Virtual Channel
    Kernel driver in use: ahci
    Kernel modules: ahci

02:00.0 SATA controller: ASMedia Technology Inc. ASM1062 Serial ATA Controller (rev 02) (prog-if 01 [AHCI 1.0])
    Subsystem: ASMedia Technology Inc. ASM1062 Serial ATA Controller
    Flags: bus master, fast devsel, latency 0, IRQ 29
    I/O ports at d050 [size=8]
    I/O ports at d040 [size=4]
    I/O ports at d030 [size=8]
    I/O ports at d020 [size=4]
    I/O ports at d000 [size=32]
    Memory at f7d10000 (32-bit, non-prefetchable) [size=512]
    Expansion ROM at f7d00000 [disabled] [size=64K]
    Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit-
    Capabilities: [78] Power Management version 3
    Capabilities: [80] Express Legacy Endpoint, MSI 00
    Capabilities: [100] Virtual Channel
    Kernel driver in use: ahci
    Kernel modules: ahci
...

Zitat von IggyWhite

Granted, there are no 8-port versions

That's what I'm looking for but can't find, a 8.

I'm thinking about replacing or trying to replace a LSI 9300-16i with 3 of the 6 port M.2. SATA breakouts inserted into a PCIe x16 -> 4x M.2 headers. _IF_ they're stable, they'll almost certainly be cooler than the 9300-16i. From all information I can find, it appears that the 9300-16i runs as hot as the newer 9600 24gb series. So if someone does buy a SAS HBA, I do not suggest the LSI 9300-16i due to the unusually high temperature resulting from 2 onboard controllers (this makes sense, but I didn't know that when I bought it :-/).

Zitat von olduser

That's what I'm looking for but can't find, a 8.

Like this one? PCIe to 8 Port SATA Expansion Card SATA3 3 6Gb HDD SSD Adapter PCI E Express X1

Zitat von IggyWhite

Like this one? PCIe to 8 Port SATA Expansion Card SATA3 3 6Gb HDD SSD Adapter PCI E Express X1

No, those are PCIe x1, I still want x4. Also, in a M.2/N.G.F.F if possible (seems unlikely).

Zitat von olduser

No, those are PCIe x1, I still want x4. Also, in a M.2/N.G.F.F if possible (seems unlikely).

PCIe X4 To SFF8087 Mini SAS 8 Port SATA 3.0

No cables in the package.

Zitat von pilgrimage80

Thank you for sharing. However, I have a PCIe Express 3.0 X1 slot. The one with 4 ports is more than enough for me. But how can I plug it in? And Openmediavault works for sure, right?

Thank you.

Usually those things are for raid. If you are trying to "pass thru" the disks and let something else handle it then you may need to flash into IT mode. Hopefully you bought one that is already in IT mode(if you have other software to do the raid). I don't think OMV will care... it's Debian. As long as the card is recognized as existing on the pci bus... you can make it work. For instance... I have a nvme sata card; doesn't show up in the BIOS at all... but it exists and I'm running omv on it as I write. Personally I prefer SAS, but it is more expensive.

I had a LSI 9240-4i in use some years ago (RAID5-config). OMV is recognising the hardware-RAID as one disk. You have to install the controllers software to maintain the disks and read f.e. smart values of them. smartctl is not working on hw-raid-controllers, as far as i know (didn't made it work; maybe put in your own script for reading -> storcli)