Date: Mon, 29 Mar 1999 16:50:32 -0700 (MST) From: Drew Eckhardt <drew@plutotech.com> To: yurtesen@ispro.net.tr, freebsd-questions@freebsd.org Subject: Re: HDD led stops working after FreeBSD...? Message-ID: <199903292350.QAA49314@pluto.plutotech.com> In-Reply-To: <Pine.BSF.4.05.9903292211090.22762-100000@localhost>
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In article <Pine.BSF.4.05.9903292211090.22762-100000@localhost> you write: >hello, >I have installed freebsd on a pII-350 which is on intel >T440BX board the board has on board ultra wide scsi adapter >53c875 on itself >after freebsd detects it, the hard drive led stops working >even if I write and read from the disk, it does not blink >what can the problem may be? NCR53c8xx implementations using the Symbios firmware have the LED wired to a general purpose I/O line and control it in software. Since other vendors use their own firmware, they're free to use the line for other purposes - like rewriting the firmware. Since the driver doesn't know whose board its controlling, it can't safely control the LED in software You can define SCSI_NCR_SYMBIOS_COMPAT when compiling the driver (add option SCSI_NCR_SYMBIOS_COMPAT to your config file, and include SCSI_NCR_SYMBIOS_COMPAT opt_ncr.h in conf/options) to get the behavior you desire. Or you can Do The Right Thing, and for all chips with ROMs map in the ROM and scan for some magic value (like the other "32 bit" ROM interfaces, Symbios probably has some sort of structure with a magic number identifying an entry point). Where this is present, patch the chip code to twiddle the GPIO bits. Where it isn't, assume the worst and follow the no #define behavior. A final option would be to throw a buffer on the SCSI BSY line, throw a suitable resistor on the output to limit current, and drive your LED off that. That will give you working blinken lights with the FreeBSD driver, the FreeBSD driver ported to Linux (I believe they now have a kernel command line option for this), and my old Linux driver..... To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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