MegaRAID 9266-4i

[hanzer]

What kind of support does OpenBSD-6.4 have for an LSI MegaRAID 9266-4i card? I have a machine with that card and four 2TB disks configured as a RAID-5. It's currently running Scientific Linux-7.5 but I am considering switching to OpenBSD-6.4 if there is good hardware support.

[jggimi]

$ apropos lsi uncovered mfi(4), which lists many LSI controllers but not your specific model. If yours is governed by the mfi() driver, you would provision it via bioctl(8).

Edited to add:

The easiest way to determine if the hardware is recognized by the mfi() driver is to boot OpenBSD from pre-installed external storage, such as a USB stick.

There is also the mfii(4) driver, for the SAS Fusion series of controllers. However, your product model number fits more closely with products mentioned in the mfi() man page. Either way, if recognized by mfi() or mfii(), the provisioning and management is through bioctl().

[hanzer]

I installed OpenBSD-6.4 onto a USB flash device and booted. $ dmesg | grep -i raid reports:

mfii0 at pci2 dev 0 function 0 "Symbios Logic MegaRAID SAS2208" rev 0x05: msi
mfii0: "LSI MegaRAID SAS 9266-4i", firmware 23.32.0-0009, 1024MB cache

When SL-7.5 is running, $ lspci -vvv | grep -i raid reports:

02:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS 2208
[Thunderbolt] (rev 05)
        Subsystem: LSI Logic / Symbios Logic MegaRAID SAS 9266-4i
        Kernel driver in use: megaraid_sas
        Kernel modules: megaraid_sas

So it looks like this card uses the SAS2208 chipset and the mfii driver. Woohoo! The backup and install plan begins.

Thanks!