Shane Nash

Teacher

Kununurra DHS

History

1956 IBM Model 350 Disk File...

How much storage do you think this drive held?

5MB of data!

The surface of the disk is so flat that if the disk was from Perth to Sydney long, the biggest hill would be 30cm high...

The disk spins so fast that if scaled it would take 3 seconds to cover the distance.

Hard Drive Facts

A finger print or particle of smoke would be enough to cause the read head to crash into disk. (3nm)

Only a buffer of air using Bernoulli's principle keeps the head off the disk.

To make disks fit so much information all the tolerances have to be tiny!

The average server hard drive fails ~10% every 3 years.

Cheaper, portable hard drives that take more abuse fail far more often.

Failure Rates

“I avoid Seagate drives like emails from Nigerian bureaucrats looking for a bit of help getting money out of their country.”

Some People Say:

These have a limited amounts of writes before they where out!

Memory sticks,

SD cards

Solid State Drives (SSD)

Memory Sticks

Assume it will fail, because it will!

Or it will go missing, get stolen, melt, get wet or simply be dropped or broken.

So What?

You should have 3 copies in at least 2 locations.

Easiest way is to use some sort of Sync as well as a Backup.

So What Should I Do?

Online Sync

Solution Positives Negatives

OneDrive Included in Windows 8

Limited Storage Cost

Dropbox Very Easy Limited Storage Cost

Google Drive Online Editing Not as good at working with Office

BitTorrent Sync Unlimited Storage

Need at least 2 computers

Mac Windows

Offline SyncPrograms

Sync Folders SyncToy 2.1

Offline Sync

Mac Windows 7 Windows 8

OfflineBackup

TimeMachine

Windows Backup

Windows 8 File History

Online Backblaze

Backup