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Hard Drives – Part 6 – External Drives

In this series of mini-blogs we’re looking at hard drives. What are hard drives, why do they fail and what can you do to extended their life and prevent data loss?

What are external drives

External drives are in many cases exactly the same technology as their internal counterparts – indeed often the exact same drive. Internally a hard drive is mounted in either a laptop or desktop PC drive cage and then connected to the motherboard via its on-board interface (usually a SATA cable). With external drives the same drive is mounted in a plastic case which is then connected to some form of intermediate interface – usually a USB or eSATA connection. The important thing to realise here is the drive within the plastic case is exactly the same as the drive in your computer and is subject to the same mechanical issues as those drives.

External drives comes in two flavours:

  1. Portable Drives – Contain a 2.5″ laptop drive; are smaller and lighter and do not require a separate power supply.
  2. Desktop Drives – Contain a 3.5″ desktop drive; are larger in physical size and data sizes and cheaper per MB but usually require a separate power supply.

External hard drives have numerous uses in the business including:

  • Bulk storage for data that is not used frequently (such as music or movies).
  • Backup of laptops, desktops and even servers.
  • Bulk movement of data around the office.
  • Bulk movement of data between offices / home / clients etc.

Next Time – Protecting External Drives

Because of their flexibility we find external drives in use throughout most of our clients. However, by their very nature external drives are subject to even more risk that their securely housed internal brethren. Next time we’ll be looking at the various options to protect your data.

Posted on by Tim
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