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

While looking through extaccess.conf I found this: 

## Engineering mode, enable everything
engineeringMode=0

Might be worth checking out.