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Tape Backup Vs. Disk Backup

August 25, 2021

The Tale of Tape Versus Disk Backup

There's no question about it. Data, information, and knowledge are what makes the world go around. And, with that said, creating a backup of your data is an important task that shouldn't be taken lightly. A backup ensures that you won't lose the sensitive data you've worked hard to accumulate in case of theft, physical damage, or unexpected database failure.

While there are several backup storage options on the market, tape and disk backup are the most widely used. Both have their strengths and weaknesses that can help or hinder your data security.

What is Tape Backup?

Tape backup is a traditional storage method in which data is stored on magnetic tape. Data is written to the tape from start to finish, leaving no space for additional data once the tape is full. This makes it a good choice for data stores that do not require a lot of space for expansion. Tape backups are inexpensive; they're well suited for long-term storage, and can be removed and archived.

What is Disk Backup?

Disk backup is a more modern-day storage method in which data is stored on hard disk drives. Data is stored in blocks and pieces, allowing it to be shredded and rearranged. Disk backups are typically faster to backup and restore than tape backups. They can offer higher performance and resilience than tape backups since they use a range of error detection and correction methods.

Comparison between Tape and Disk Backup

To help you select the best backup storage option for your data, we've gathered some important factors to keep in mind when making a comparison.

Cost

When it comes to cost, tape backups have proven to be less expensive than disk backups. A single tape used for backup storage can cost significantly less than a 1TB hard disk drive. Included in the cost of disk backups is the cost of electrical power that is used to keep the disks spinning. Moreover, disk drives are more sensitive to physical damage than tapes, which can be prone to scratching.

Speed

A disk backup is generally quicker to backup and restore than a tape backup. This is because a backup can be done more quickly with a disk backup since the data is usually broken into smaller pieces that can be processed by the backup software quicker. The time taken to retrieve data is also quicker since disk data is accessed almost instantly.

Durability

Tape backups are very durable and reliable, even with frequent use. Magnetized tapes have a long shelf life that can extend beyond thirty years. On the other hand, disk backups are more prone to corruption or failure since they physically spin at a high rate of speed. Disks are mechanical devices and, like all mechanical components, can be prone to damage or failure over time.

Conclusion

So, which backup storage option should you choose? It depends on the specific features that matter most to your particular scenario. Both tape and disk backups have their pros and cons, and you should consider your specific requirements before deciding one or the other. For a more traditional and affordable option, tape backup storage is the right choice. If you need higher speed and are ready to invest in more modern technology, then disk backup storage is a better fit.

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