[9fans] SCSI initialisation

[9fans] SCSI initialisation

[Lucio De Re]

The current (?) version of /sys/src/boot/pc/sdscsi.c has the
following in :/^scsiverify:

		if((r->sense[2] & 0x0F) != 0x02)
			continue;
		if(r->sense[12] == 0x3A){
			status = SDok;
			break;
		}

as opposed to, in /sys/src/9/pc/sdscsi.c:

		if((r->sense[2] & 0x0F) != 0x02)
			continue;
		/*
		 * Unit is 'not ready'.
		 * If it needs an initialising command, set status
		 * so it will be spun-up below.
		 * If there's no medium, that's OK too, but don't
		 * try to spin it up.
		 */
		if(r->sense[12] == 0x04 && r->sense[13] == 0x02){
			status = SDok;
			break;
		}
		if(r->sense[12] == 0x3A)
			break;

Sadly, my controller seems to return

                r->sense[12] == 0x04 && r->sense[13] == 0x01

and I have no idea what to make of it :-(

Suggestions?  I can't find my SCSI reference manual, so I'ma bit at
the mercy of the list.  Oh, the problem I'm trying to address is
9load's inability to use #S/sd00/9fat/plan9.ini.

++L

RE: [9fans] SCSI initialisation

[Nigel Roles]

>                 r->sense[12] == 0x04 && r->sense[13] == 0x01
>
> and I have no idea what to make of it :-(

It means that the device is "in the process of becoming ready".

I expect you can figure out how to handle that.

Re: [9fans] SCSI initialisation

[Lucio De Re]

On Tue, Apr 29, 2003 at 10:59:00AM +0100, Nigel Roles wrote:
>
> >                 r->sense[12] == 0x04 && r->sense[13] == 0x01
> >
> > and I have no idea what to make of it :-(
>
> It means that the device is "in the process of becoming ready".
>
> I expect you can figure out how to handle that.

I gambled on

	if (r->sense[12] == 0x04){
		status = SDcheck;
		if(r->sense[13] == 0x01)
			status = SDok;
		break;
	}
	...
	return (status == SDok || status == SDcheck);

which seems to have worked.  I guess I ought to take the more patient
approach of actually waiting for r->sense[13] == 0?  Or are the sense
values meant to be something else altogether?

++L