LTO Tape vs NAS vs Cloud: Building a Backup Strategy That Holds

NAS, cloud and tape are not rivals competing for the same job. They are three layers that cover each other’s weak spots, and a real strategy uses more than one.

Most setups described as a backup in Malta are really one copy of the data sitting in one place: a second drive in the same server, or a folder syncing to a single cloud account. That is a single point of failure with a reassuring name. The moment ransomware reaches it, the building floods, or someone deletes the wrong folder, the backup goes with the original. Choosing well is less about picking the best medium than about understanding what each of NAS, cloud and LTO tape is genuinely good at, where each fails, and how to combine them so the failure of any one does not take your data with it. This guide compares the three on cost, security and recovery, and shows how to build a strategy that survives a bad day. Sirap designs and supports all three layers for Maltese businesses, so this is written from building them, not from a brochure.

The distinction that matters: a copy is not a backup, and one medium is not a strategy

The single most useful idea in data protection is the 3-2-1 rule: keep at least three copies of your data, on two different types of media, with one copy kept offline and offsite. The reason it works is that it removes shared points of failure. Two copies on the same NAS both die if the NAS dies or is encrypted; two copies in the same cloud account both vanish if the account is compromised. Three copies across different media, with one of them physically disconnected, means no single event, a ransomware strain, a hardware failure, a fire, a billing dispute with a provider, can reach all of them at once. Everything below follows from this: NAS, cloud and tape each fill a different slot in 3-2-1, which is exactly why the question is rarely “which one” and almost always “which combination”.

What is NAS good at, and where does it stop?

Network Attached Storage, such as a Synology NAS, is the workhorse of the recovery layer: shared storage on your network that backs up fast and restores fast. When someone needs yesterday’s version of a file back in seconds, or a server has to be recovered quickly, NAS is the right tool, because disk is random-access and quick. A good NAS also adds snapshots, versioning and its own redundancy, and it is easy to live with. The catch is the one people forget: a NAS is on the network, which means the same ransomware that reaches your servers can usually reach the NAS too, and RAID redundancy protects against a disk failing, not against deletion, corruption or encryption. A NAS is an excellent first backup copy and recovery tier. It is not, on its own, a backup strategy, because it shares the network, and often the building, with the data it is protecting.

What does cloud backup add, and what is the catch?

Cloud backup, such as Acronis, covers the offsite slot of 3-2-1 without you running a second site. Your data sits in geographically separate infrastructure, reachable from anywhere, scalable on demand, and managed for you. For offsite redundancy and remote recovery it is genuinely convenient, and for many businesses it is the easiest third copy to maintain. The catches are cost and control. Cloud storage is rented, so the cost recurs every month and grows with your data, and pulling large volumes back (egress) can be slow and chargeable just when you most need it, during a big recovery. There are also residency and compliance questions: for a regulated Maltese business you need to know where the data physically sits and that it meets GDPR and your sector’s rules, which is why we favour providers with EU data residency and strong encryption. Cloud is a strong offsite layer; it is not automatically the cheapest at scale, and it is not automatically compliant without checking.

Where is LTO tape unbeatable?

LTO tape owns the part neither NAS nor cloud does well: the offline, long-retention, low-cost copy. Once a tape is written and ejected it is physically disconnected, an air gap no network attack can cross, which makes it the strongest answer to ransomware specifically. It is built for longevity, with a proven archival life of around 30 years, far beyond a disk left spinning. It is the cheapest medium per terabyte for data kept at rest, and it draws no power on a shelf. And a modern cartridge holds a lot: LTO-9 stores 18 TB native (up to 45 TB compressed). The trade-off is that tape is sequential, so restoring a single file is slower than from disk; tape is the deep, durable copy you reach for after a real incident or for long retention, not the place to grab one file in a hurry. Sirap supplies the LTO range from actiData, from a standalone drive to scalable libraries; if you are choosing the system itself, our LTO buyer’s guide walks through drive vs autoloader vs library.

The LTO generations in plain numbers

LTO has advanced through generations that each roughly double capacity. The ones in use today:

An LTO-9 drive reads and writes LTO-9 and LTO-8, so you are not locked in, and the LTO roadmap continues to raise capacity in future generations. For most new deployments LTO-9 is the sensible choice; where you already run LTO-7 or LTO-8, matching it can be cheaper. We confirm the current generation and availability when we size the system.