# Data storage

## Spinning Disks

Cheaper for more storage


## RAID - Redundant Array of Independent Disk

Raid 0: basically cramming multiple drives and treating them as one. Data is striped across the drives but if one fails then you literally lose a chunk of data.

Raid 1: data is mirrored across the drives so it's completely redundant so if one fails the other is still alive. It's not a backup however since file updates will affect all the drives.

Raid 5: parity. Combining multiple drives allows us to establish the parity of the data on other drives to recover that data if it goes missing.(min 3 drives)

Raid 6: same in principle as raid 5 but this time we have an extra drive for just parity.

Raid 10: 0 and 1 combined to have a set of drives in raid 0 and putting those together in raid 1 with another equally sized set of drives.

## Network Attached Storage - NAS

Basically space stored on the local network.

## Storage Attached Network - SAN

Applicable when we virtualise whole os's for users, we use a storage device attached to the network to use different operating systems


# Managing Storage

Outsourcing the storage for users to services like Onedrive because it becomes their problem and not ours.

# Storage as a Service

Ensure that the OS gets its own space/partition on a drive and give the user their own partition to ruin. That way the OS(windows) will just fill its partition into another dimension.


# Print Services