ZFS (previously Zettabyte File System) is a Enterprise-grade and highly scalable advanced filesystem. ZFS is a fundamentally different file system because it is more than just a file system.

ZFS combines the roles of file system and volume manager, enabling additional storage devices to be added to a live system and having the new space available on all of the existing file systems in that pool immediately. By combining the traditionally separate roles, ZFS is able to overcome previous limitations that prevented RAID groups being able to grow. Each top-level device in a zpool is called a vdev, which can be a simple disk or a RAID transformation such as a mirror or RAID-Z array. ZFS file systems (called datasets) each have access to the combined free space of the entire pool. As blocks are allocated from the pool, the space available to each file system decreases. This approach avoids the common pitfall with extensive partitioning where free space becomes fragmented across the partitions.

Self-healing data protection is built-in natively to XigmaNAS and ZFS. This gives the file system the ability to automatically recover from drive errors and failures without the loss of data/corruptions of data.

There are a couple of things about ZFS itself that are often skipped over or missed by users/administrators. Many deploy home or business production systems without even being aware of these gotchya's and architectural issues. Don't be one of those people! ////

Some dated info, but good basics

Butcher recalls sitting in a meeting about collecting WTC artifacts some months later when a colleague blurted out something about the jumpers having committed suicide.

My boss was always calm and dignified, but at that moment I saw the strain on his face as he tried to maintain his composure.

His anger was palpable.

He put his hands flat on the table in front of him and said, “Never use those words. Never.”

They were pushed out, he explained, by flames and smoke.

In fact, writes Butcher, the death certificates of every person killed at the World Trade Center on 9/11 read "homicide." Homicide, she notes, is defined as “death at the hands of another.” The people who jumped had been fighting for their lives.

"It is a fact that terrorists pushed these people to their deaths, murdering them," concludes Butcher. //

That seems like a fair and small gesture that could be made to put things into perspective on one of the more gruesome, yet important, aspects of 9/11. People were literally pushed to what had to be the most terrifying decision of their lives.