Friday, June 20, 2014

Raspberry Pi Time Machine

Backup is a good thing. And anything that makes making backups simpler is also a good thing. That's why I like Apple's Time Machine. But my 5 year old, 500GB Time Capsule is running a bit short on space, backing up two Macs.

So, I was thinking of upgrading to a funky new 5th generation Time Capsule, with 2 or 3TB of hard disk on-board. It's got exciting new technologies like "beamforming" and 802.11ac. It even looks like a TARDIS (with a white paint job).

But those probably won't make any difference to my existing kit, and the WiFi base station part of my current Time Capsule works fine. So, I thought, why not just hang a 2TB USB HDD of the Raspberry Pi and back-up to that?

Fortunately someone else had already had the same idea and written down how to set up the Raspberry Pi as a remote server for Time Machine, so I just followed that. And it works fine.

Bear in mind that neither the networking or USB on the Raspberry Pi is superfast, but neither was the external HDD I added to it. (Use a disk with a separate power supply). And the backups happen in the background anyway, so speed isn't really that much of an issue.

Note: I have since bought a Synology DiskStation so now I do my back-ups to that rather than using the Raspberry Pi.

Wednesday, June 11, 2014

Numbers and Letters

Inspired by this week's Only Connect, I thought I'd make a list of letters and the smallest number they appear in when written in English, starting from one (or zero):

A: one hundred and one (or one thousand, if you don't like using "and")
B: one billion
C: one octillion
D: one hundred
E: one (or zero)
F: four
G: eight
H: three
I: five
J: never happens
K: never happens
L: eleven
M: one million
N: one
O: one (or zero)
P: one septillion
Q: one quadrillion
R: three (or zero)
S: six
T: two
U: four
V: five
W: two
X: six
Y: twenty
Z: never happens, unless you get to "one zillion" (or zero)