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Top-level
 zululog.txt has the smoking gun: [996859ms] WARNING: Host used command 0x1A which is affected by drive geometry. Current settings are 63 sectors x 255 heads = 16065 but image size of 2097152 sectors is not divisible. This can cause error messages in diagnostics tools. i think the solution here is to resize the disk image file so it is divisible by 63*255*512. 122 comments
@tubetime this FF is suspiciously looking like high-Z.  @tubetime 6D B6 DB is a worst-case test pattern for MFM encoding, so the NAND flash chips in your SD card must not have enough timing margin for the channel code.   @tubetime the one part of the spinning rust drive you didn't want it to emulate @tubetime might not be helpful, as it’s a fairly different machine, but I recently watched this video of someone getting a SPARCclassic up and running off a bluescsi v1, and they seemed to have a good reason to use scsi id 3 https://youtu.be/SMz2y-wdbzs @tubetime I have a vague memory of some early Sun stuff usurping SCSI ID 0, but can't recall the details.  @tubetime the network is the computer, and the computer is a time machine  @tubetime yeah so external drives used to ship with all the little jumpers off (ID=0) and if you plugged that into your Sun4 it wouldn't boot and then you'd call the service department ... so they wanted to make the main disk some other ID but everyone assumes the boot volume is sd0 ... so some evil genius came up with this plan. The *good* external drives had a little pushbutton wheel thingy on the back to change their ID :-)  @tubetime I agree with the sun engineers. Why is something with a 20MHz CPU and 1gb of spinning rust (probs not the original, much more likely to ve 500MB) even powered on in 2023?   @tubetime 1994: Bah! That's preposterous! Reminds me of this comment in leapsecs.txt in libtai: "Note for parsers: Negative leap seconds will probably never happen, but the year 10000 will happen. Please don't contribute to the Y10K problem." @tubetime Just seeing that terminal font made me think Solaris..I think it’s still being used in 11 or whatever they’re on now?   @tubetime That font brings back memories. I can still viscerally feel the slowness!  @tubetime This is probably the code triggering the warning: https://github.com/csrg/original-bsd/blob/master/sys/sparc/sparc/clock.c#L403-L408 It seems to be checking for dates too far in the past (before 1975, by the look) rather than too far in the future. I wonder if it is reading a zeroed sector on the disk where a unix timestamp would be in a running system? @tubetime The condiments of the season and a preposterous new year! https://www.youtube.com/watch?v=Dv0hrQYbTXM&t=775s   @tubetime mhm, seems this SunOS won't run until timer overflow... Keep on and wish you best luck! @tubetime haha, I forget the name but there's at least one dos game that if you launch after a certain date it starts up with "YEAAHHHH STILL PLAYING (game) in 2023!!!"  @tubetime as far as I remember this is also on the SPARCstation 2, SLC, ELC, IPC and IPX @tubetime Isn't the boot drive SCSI ID set to 3 on early Sun systems? |
Gregory's Server
@tubetime This all reminds me of my days with @Migueldeicaza helping him port Linux (him the kernel, me the rest of Red Hat) to the SPARC. The hardware had some idiosyncrasies but we USUALLY found them to all have fairly good reasons. Usually. My favorite thing was getting Linux to install to one from tape. AFAIK I’m the only person to ever do that.