Date: Mon, 5 Nov 2007 13:27:37 -0800 (PST) From: Doug Ambrisko <ambrisko@ambrisko.com> To: Scott Long <scottl@samsco.org> Cc: freebsd-scsi@freebsd.org Subject: Re: MFI and passthrough Message-ID: <200711052127.lA5LRblV035714@ambrisko.com> In-Reply-To: <4727FA4A.2000708@samsco.org>
next in thread | previous in thread | raw e-mail | index | archive | help
Scott Long writes:
| The passthrough interface is really only meant for doing management
| tasks like SMART monitoring and firmware flashes. I've also seen it
| used for low-duty devices like tape drives. I do not recommend using it
| to directly control disks in a primary fashion. However, since this is
| open source, I won't prevent you from trying =-) Try the following
| patch:
|
| --- mfi_cam.c 12 Oct 2007 16:52:55 -0000 1.3
| +++ mfi_cam.c 31 Oct 2007 03:42:25 -0000
| @@ -344,9 +344,11 @@
| command = ccb->csio.cdb_io.cdb_bytes[0];
| if (command == INQUIRY) {
| device = ccb->csio.data_ptr[0] & 0x1f;
| +#if 0
| if ((device == T_DIRECT) || (device ==
| T_PROCESSOR))
| csio->data_ptr[0] =
| (device & 0xe0) | T_NODEVICE;
| +#endif
| }
| break;
| }
BTW, it works great in this mode if you know what you are doing :-)
| I do believe that Dell does sell a direct attached disk option for
| the 2950/1950 called the PERC5/e. It's essentially an LSI MPT-SAS
| controller that directly replaces the PERC5/i card that you have now.
| It should be able to control all 6 disk slots, and can do both SAS
| and SATA.
I've been told the PERC5/e and PERC5/i are the same except for PCI
sub-device ID and are both the mfi(4) RAID controllers. They do
have a mpt(4) based card but it only supports 4 bays. I'm not sure
what it's real name is but we have some lying around for random
testing. I don't leave them in machines.
Doug A.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200711052127.lA5LRblV035714>