On Tuesday 2019-10-29 at 11:01 AM US/East a team of amateur radio operations, myself included, made contact with the International Space Station. Thirteen students from Farmwell Station Middle School (FSMS), part of Loudoun County Public Schools (LCPS), were able to ask questions of Dr. Drew Morgan. This was thanks to the Amateur Radio on the International Space Station (ARRIS) program and Loudoun Amateur Radio Group (LARG).

This script helps identify what disks are in use (or not in use) by ZFS. It's a stupid-simple python 3 script that requires only 'sh'. You can get that via 'pip3 install sh'. 

#!/usr/bin/python3
import re
from sh import zpool,lsblk,ls
from pprint import pprint

print("Finding all disks")
sdisks = str(lsblk('-d').stdout)
# sdbl  67:240  0   7.3T  0 disk
alldisks = re.findall(r'(sd[a-z]+)\s+\d+:\d+\s+\d+\s+(.*?)\s+\d+\s+disk',sdisks,re.MULTILINE)
print("Found %d disks on system"%len(alldisks))

Check `pvdisplay` as Ceph can use LVM. 

zfs destroy data/osd 
cannot destroy 'data/osd': dataset is busy

For those who aren't aware, there is a bit of controversy in the ham radio community at the moment around Winlink. The tl;dr here is that a bunch of boaters started getting ham radio license so they could use Winlink to send and receive email when they're out at sea.

The problems started when a few of them started using it for more than personal use - they were using it commercially. This is strictly prohibited with ham radio. This is compounded by some of the boaters not using it properly; they'd use it on frequencies already in use by others at that time.

The i2000 & i6000

Around December 2018 I purchased a used Scalar i2000 and a few weeks later a used Scalar i6000 gen1. Both are from Quantum. Although ADIC made the previous revisions. IIRC there is a third vendor that also sold them under their name. 

The LTO-6 drive in my i6000 is now working!

Static Hostnames

10.22.0.202   gibson6
10.10.1.1       M000127
10.10.1.2       R000117

# IOB lookups, do not modify anything after this in the file
#Frame 1
10.10.0.1       I0000001
10.10.0.3       I0000031
10.10.0.5       I0000051
10.10.0.6       I0000061
10.10.0.9       I0000091
10.10.0.10      I0000101
10.10.0.28      M0000281

NFS Exports

ilinkacc: $ cat /etc/exports
# See exports(5) for a description.
# This file contains a list of all directories exported to other computers.
# It is used by rpc.nfsd and rpc.mountd.

/var/log/adic   *(rw,no_subtree_check,no_root_squash,async)
/etc/adic       *(rw,no_subtree_check,no_root_squash,async)
/tftpboot       *(ro,no_subtree_check,no_root_squash,async)

Disk Mounts

CPU Info

ilinkacc: $ cat /proc/cpuinfo
processor       : 0
cpu             : 440GP Rev. C
revision        : 4.129 (pvr 4012 0481)
bogomips        : 593.92
vendor          : ADIC
machine         : MCB