It was discussed in the IRC earlier. FreeNAS is built from FreeBSD stable. And FreeBSD stable got the v16 driver a week or so ago. He includes the v16 phase firmware in that download. If you flash that it should be backwards compatible with older drivers. Also, if you read the dmesg output from your FreeNAS system with the M1015 installed it will say something like:
Code:
mps0: <LSI SAS2008> port 0x4000-0x40ff mem 0xd2400000-0xd2403fff,0xd2440000-0xd247ffff irq 18 at device 0.0 on pci3
mps0: Firmware: 16.00.00.00, Driver: 13.00.00.00-fbsd
mps0: IOCCapabilities: 1285c<ScsiTaskFull,DiagTrace,SnapBuf,EEDP,TransRetry,EventReplay,HostDisc>
mps0: [ITHREAD]
That is listed so you can do your own compare. :)
Edit: Ok, I think that he only has the p15(presumably because the p16 driver wasn't mainstreamed yet). But if you read the thread that actually has the download file he makes multiple mentions of updates and various other people ask about how to "update" his zip file with the p16 download.