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SLED (Single Large Expensive Disk)

In computing, a single large expensive disk (SLED) is a traditional data storage system that uses only a single hard disk drive. These conventional systems are an alternative to RAID (a redundant array of independent disks), which consists of multiple smaller hard disks that can improve efficiency and fault tolerance. On average, SLEDs are nearly twice the diameter of RAID systems and more expensive to manufacture. The SLED design was commonly used in mainframes and computers until the arrival of personal computers in the 1990s; it has since fallen by the wayside as more cost-effective solutions have emerged.

What Small and Midsize Businesses Need to Know About SLED (Single Large Expensive Disk)

These days, few companies use SLED technology, which tends to be slower and cost more than alternatives such as RAID. The question of SLED vs. RAID shows how IT environments evolve as new technologies overtake existing ones.

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