Setting up RaSCSI

I have a 1989 Macintosh SE/30 and a 1993 Macintosh LC III and their SCSI discs are dead, so what are the options?

BlueSCSI

Brilliant!

RaSCSI

RaSCSI has been replaced by PiSCSI but the software for PiSCSI support RaSCSI. Versions.

The main difficulty is shutting down the pi safely after shutting down the Mac.

I found this supercapacitor UPS that turned out to be perfect. It will power the Pi Zero for about a minute. It has a 3.3V pin that can be connected directly to a GPIO to detect power loss and trigger shutdown. Shutdown takes about 30s. The Pi restarts when power is restored, even if the capacitors didn’t drain completely.

The PiSCSI software doesn’t work

$ sudo piscsi
Illegal instruction
$

Version 22-08-01 is available in a tarball and the rascsi service works but the website doesn't — better than nothing.

Using a Pi Zero W and USB OTG to an FTDI USB RS232 adaptor I can PPP from the Mac into the Pi to connect it to my network.

Making an SD card for the Rasbperry Pi

After making the SD card (I'm using a 8GB card with no UI, 4BG would work excpet that I have a 2GB disc image). add to the windows partition of the SD card (called boot) a file named ssh; this allows remote SSH into the RaspberryPi so you don’t need a monitor — if you can get the network up.

WiFi drivers for RT8188EUS

My Pi Zero doesn’t have wifi beause they weren't available. Therefore I got a cheap USB wifi adapter. Turns out it's an RT8188EUS.

What’s going on? 

$ lsusb
Bus 001 Device 006: ID 0bda:8179 Realtek Semiconductor Corp. RTL8188EUS 802.11n Wireless Network Adapter
$ ip a
3: wlan0:  mtu 1500 qdisc mq state DOWN group default qlen 1000
 link/ether 00:e0:2d:2b:29:d3 brd ff:ff:ff:ff:ff:ff

Here is /etc/network/interfaces.d/wlan0 

auto wlan0
allow-hotplug wlan0
iface wlan0 inet dhcp
wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

Here is /etc/wpa_supplicant/wpa_supplicant.conf 

country=GB
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1

network={
 ssid="mini31"
 psk="TOP_SECRET"
}

The interface wlan0 connects to my access point (which is Debian running on a Mac Mini 3,1).

Initially sudo ifup wlan0 didn’t make it work as it wouldn’t get an IP address via DHCP. However, after a reboot it came up.

MOTD

First remove the annoying spam.

$ sudo rm /etc/motd

Then install a cooler MOTD.

$ sudo apt-get install fortune fortunes-off cowsay
$ sudo touch /etc/update-motd.d/50-motd

The contents of /etc/update-motd.d/50-motd should be:

uptime | awk '{print "up: " $3 " " $4 " la: 1:" $11 " 5:" $12 " 15:" $13}'
df -h | grep root | awk '{print "df: " $4 " (" $5 ")"}'
vcgencmd measure_temp
/usr/games/fortune -a | /usr/games/cowsay

And in /etc/ssh/sshd_confi set PrintLastLog no.

Reporting IP address

Although in practice the IP address will be the same every time, in principle it would be nice to report the IP address to the mini31. There seem to be a few possible ways to do this:

My first tought was to use dhclient-exit-hooks.d because I want to know about IP addresses and DHCP is where they come from. Therefore I add a script to /etc/dhcp/dhclient-exit-hooks.d: 

if [ -z $new_ip_address ]; then
        exit 0
fi

echo "$(date +"%d %b %y %H:%m") $interface $new_ip_address" | ssh -T rwb@mini31 " cat >> pi-ip.txt"

(Which, of course, requires ssh keys to have been exchanged.) You can then do something like this: 

alias sshpi=ssh pi@$(tail -n 1 /home/rwb/pi-ip.txt | awk -F'[ /]' '{print $5}')

This seems to work only when the interface gets a new address, but I want it to report every time the interface comes up. Therefore I need the /etc/network/if-up.d approach: 

#!/bin/sh

# See /etc/rc.local

date=`date +"%b %d %H:%M"`
ip=`ip -o -f inet a | grep 192.168 | awk '{print $4}'`

if [ -z "$ip" ]; then
        logger "ip-to-mini31-cron got no IP"
        exit 0
fi;

echo "$date: $ip if-up.d" | ssh -i /home/pi/.ssh/id_rsa rwb@192.168.1.31 "cat - >> pi-ip.txt"

logger "ip-to-mini31-cron reported $ip"

Unfortunately it never runs and I can’t work out why.

Installing RaSCSI

Old: RaSCSI

$ sudo apt-get update
$ sudu apt full-upgrade # something to do with version of Debian changing

Next to install RaSCSI. 

$ sudo apt-get update && sudo apt-get install --yes git libspdlog-dev
$ git clone https://github.com/akuker/RASCSI.git
$ cd RASCSI/
$ ./easyinstall.sh # choose option 0: install RaSCSI Service + web interface + 600MB Drive (recommended)
# The image is created at /home/pi/images/600MB.hda
$ cd ~/RASCSI/src/raspberrypi 
$ make all CONNECT_TYPE=FULLSPEC
$ sudo make install CONNECT_TYPE=FULLSPEC
$ sudo systemctl restart rsyslog
$ sudo systemctl status rascsi # running, so it must have installed
$ sudo shutdown -r now
# does rascsi come back up?
# yes!

The RaSCSI web interface is running on port 80 (for me this is http://192.168.1.193/). Note that it’ not https.

The disc image needs to be attached. This can be done in the web interface, on in the command shell: 

$ rasctl -i 0 -c attach -t hd -f /home/pi/images/600MB.hda
$ rasctl -l

Next steps: ISO images; the reason the RaSCSI could be useful over and above the BlueSCSI is to install A/UX on the SE/30.

Apparently NetBSD runs on m68k...

New: PiSCSI

Installing the RaSCSI software: 

$ sudo apt install git libspdlog-dev libpcap-dev rsyslog build-essential bridge-utils ca-certificates libprotobuf-dev protobuf-compiler libgmock-dev
$ git clone https://github.com/PiSCSI/piscsi.git
$ cd piscsi
$ ./easyinstall.sh
$ sudo systemctl restart rsyslog
$ sudo systemctl enable piscsi
$ sudo systemctl start piscsi
$ sudo systemctl status piscsi

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