61 lines
1.8 KiB
Markdown
61 lines
1.8 KiB
Markdown
Data storage
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============
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Spinning Disks
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--------------
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Cheaper for more storage
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RAID - Redundant Array of Independent Disk
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Raid 0: basically cramming multiple drives and treating them as one.
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Data is striped across the drives but if one fails then you literally
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lose a chunk of data.
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Raid 1: data is mirrored across the drives so it's completely redundant
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so if one fails the other is still alive. It's not a backup however
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since file updates will affect all the drives.
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Raid 5: parity. Combining multiple drives allows us to establish the
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parity of the data on other drives to recover that data if it goes
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missing.(min 3 drives)
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Raid 6: same in principle as raid 5 but this time we have an extra drive
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for just parity.
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Raid 10: 0 and 1 combined to have a set of drives in raid 0 and putting
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those together in raid 1 with another equally sized set of drives.
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Network Attached Storage - NAS
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------------------------------
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Basically space stored on the local network.
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Storage Attached Network - SAN
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------------------------------
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Applicable when we virtualise whole os's for users, we use a storage
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device attached to the network to use different operating systems
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Managing Storage
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================
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Outsourcing the storage for users to services like Onedrive because it
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becomes their problem and not ours.
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Storage as a Service
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====================
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Ensure that the OS gets its own space/partition on a drive and give the
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user their own partition to ruin. That way the OS(windows) will just
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fill its partition into another dimension.
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Backup
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======
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Other people's data is in your hands so make sure that you backup data
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in some way. Some external services can be nice if you find that you
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constantly need to get to your backups. Tape records are good for
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archival purposes; keep in mind that they are slow as hell.
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