Multipathing Storage Support in Apple macOS

[FlyerKumar]

Does Apple still support multipathing as indicated in this Technical Note TN2173: Multipathing with FibreChannel on Mac OS X on the Apple website, in the current versions of Apple macOS and if not, when (what version of Apple Mac OS X or macOS) was it removed or discontinued?

Was it only implemented only for Fibre Channel (and that too only for the Apple Fibre Channel cards which presumably were made for Apple by then-LSI Logic, now since part of Broadcom, or any Fibre Channel HBA?) or was it implemented for (or compatible with) SAS (Serial Attached SCSI) as well given that all SAS drives are dual-ported and support multipathing for redundancy and redundant paths to access them in addition wide-port mode for additional bandwidth?

If it still exists in currency versions of macOS, does it support only Fibre Channel or does it also apply to and support SAS HBAs and/or RAID controllers?

How would one access the macOS interface for it? Is there a GUI in macOS to access the multipathing settings or is there a terminal utility or set of terminal commands to view the status and settings and/or to configure it in macOS?

 

[DeltaMac]

Looks like a company such as ATTO has support articles, as well as updated software for macOS, updated as recently as February 2023, for both Fibre Channel card drivers and ATTO's configuration software for multi-path on Macs.

Downloads | Fibre Channel HBAs | ATTO

www.atto.com

That shows some kind of support up to the current Ventura. That may give you some info about whether those cards are supported with an M-series Mac - which you would want to find out for the 2023 Mac Pro. You would probably want to contact ATTO support directly. That may be the quickest way to find out if you can do what you want, or find out that the M-series Macs are not supported, or maybe limited support. (I don't know anything about that, just suggesting possible outcomes.