A RAID 5 uses block-level striping with parity data distributed across all member disks.
Requirements: At least 3 drives
Fault Tolerance: (N – 1) Can tolerate loss of one drive
Capacity: (Size of Smallest Drive) * (Number of Drives – 1)
Archives for March 2011
RAID 1
RAID 1 – Mirroring without parity or striping.
– Minimum disks: 2
– Data redundancy (mirror)
– One disk may fail
– Effective protection against physical disk failure
RAID 0
RAID 0 is a simply data stripe over several disks.
– No data protection
– Better performance
– Requirements: At least 2 drives
– Put several disks to one bigger one
– If one disk fails, you lose all your data
– Raid 0 is excellent for non-mission critical situations
JBOD
JBOD (Just a Bunch Of Drives) and its not a RAID.
JBOD allows you to create a large virtual disk by concatenating more smaller drives together.
This method is outdated and unsafe. If one of your disks gets broken, you will lose all your important data!
– Requirements: At least 2 drives
Web frameworks
For most tiny web-projects is django or Ruby on Rails the overkill and that is mostly the problem which is between the framework and the quick solution.
There are a lot Micro Frameworks available without nasty and unnecessary stuff. Here is a short overview of them: