Cisco HDD-7845-H1-72 73GB U320 SCSI 15K 3.5\

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Cisco HDD-7845-H1-72 73GB U320 SCSI 15K 3.5" LFF Hot Swap HDD

  • Part Number : HDD-7845-H1-72
  • Brand : CISCO

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CISCO HDD-7845-H1-72 Manufacturer
CISCO HDD-7845-H1-72 Capacity
CISCO HDD-7845-H1-72 Spindle Speed
Spindle Speed
CISCO HDD-7845-H1-72 Interface
Ultra-320 SCSI
CISCO HDD-7845-H1-72 Workload
Enterprise (ENT)

Full CISCO HDD-7845-H1-72 Specifications

Brand Cisco
Capacity 73GB
Hot-Swappable Yes
Spindle Speed 15K
Interface Type Ultra-320 SCSI
Workload Enterprise (ENT)
Cache 8MB

CISCO HDD-7845-H1-72 Frequently Asked Questions

What does it mean if a hard drive runs at 15,000 RPMs?

When referring to server hard drives, the term "15000 RPM" signifies the rotational speed of the drive's platters, measured in revolutions per minute. It denotes how fast the platters spin inside the hard drive enclosure. This feature was introduced a few years ago and marked a significant breakthrough in hard drive technology.

The advent of 15000 RPM drives represented a notable leap forward from the previous standard of 10000 RPM. By increasing the rotational speed, these drives achieved quicker data access times and higher data transfer rates. The accelerated rotation enabled the read/write heads to retrieve and store data more rapidly, resulting in reduced latency and enhanced overall performance.

This advancement held particular importance in the realm of server technology, where fast data processing and swift access to information are critical. Server environments often handle demanding workloads and necessitate rapid and efficient data storage systems. The introduction of 15000 RPM drives helped meet these requirements by delivering enhanced speed and responsiveness, enabling servers to swiftly process and deliver data.

Furthermore, faster hard drives can have a significant impact on tasks involving large data sets, such as database queries, data analysis, and content delivery. They can minimize the time needed for data retrieval, leading to improved efficiency and productivity in server operations.

However, it's important to note that with the advancements in solid-state drive (SSD) technology, traditional hard drives, including those with 15000 RPM, have become less prevalent in server environments. SSDs offer even faster access times, higher data transfer rates, and greater reliability due to their lack of moving parts.

What does it mean if a drive is hot-swappable?

Hot Swap, also known as hot swapping or hot plugging, refers to the ability to replace or add components in a computer system without shutting down or interrupting the operation of the system. In the context of server hard drives, hot swapping allows you to remove or insert hard drives while the server is running and operational, without causing any downtime or disruption to the services the server provides.

This feature was introduced to improve system availability, reliability, and ease of maintenance. Before hot swapping became common, adding or replacing components in a running system required shutting down the system, which could result in service interruptions and downtime. With hot swap capabilities, server administrators can perform maintenance tasks such as replacing a failed hard drive or adding additional storage capacity without affecting the overall system operation. This is particularly important in scenarios where uptime and continuous service availability are critical, such as in data centers, enterprise environments, and high-performance computing systems.

The concept of hot swapping dates back to the early days of computing, but it became more widely implemented in the late 1990s and early 2000s as server hardware and storage technologies evolved. The specific release dates of hot swap-capable hardware may vary depending on manufacturers and models, but it became a standard feature in many enterprise-grade servers and storage systems during this time period.

In addition to hard drives, hot swapping has been applied to various components, including power supplies, cooling fans, and network interface cards, among others. The ability to replace and upgrade components without downtime has contributed significantly to improved system uptime, reduced maintenance costs, and enhanced overall system reliability.

What does it mean if a hard drive has an interface of Ultra320-SCSI?

Ultra-320 SCSI, an abbreviation for Ultra-320 Small Computer System Interface, refers to a type of interface used in server hard drives. It was introduced as a groundbreaking technological advancement aimed at enhancing data storage capabilities.

The release of Ultra-320 SCSI took place in the early 2000s, with the specifications finalized in 2002. This innovative feature marked a significant leap forward compared to its predecessors, such as Ultra-160 SCSI and Ultra-2 SCSI. The "320" in its name signifies its maximum data transfer rate of 320 megabytes per second (MB/s), representing a substantial increase in speed at that time.

The introduction of Ultra-320 SCSI carried great importance for several reasons:

  1. Enhanced data transfer speed: Ultra-320 SCSI delivered notably faster data transfer rates than previous SCSI standards. This boost in speed proved crucial for servers dealing with large volumes of data, as it facilitated quicker access to information, reduced latency, and overall improved system performance.

  2. Scalability and compatibility: Ultra-320 SCSI ensured compatibility with prior SCSI generations, allowing existing SCSI devices and infrastructure to remain in use. This ensured a seamless transition to Ultra-320 SCSI without the need for a complete overhaul of the SCSI infrastructure.

  3. Reliability and resilience: SCSI technology has long been recognized for its reliability and resilience. Ultra-320 SCSI continued this tradition by offering robust data transmission with effective error detection and correction mechanisms. Such reliability was especially critical for servers powering essential applications and enterprise-level storage systems where data integrity and availability were of utmost importance.

  4. Widespread industry adoption: Thanks to its performance advantages and compatibility, Ultra-320 SCSI quickly gained popularity within the server and storage industry. Numerous server vendors and storage manufacturers incorporated Ultra-320 SCSI interfaces into their products, making it a favored choice for enterprise-level deployments.

In summary, Ultra-320 SCSI represented a significant breakthrough in server hard drive technology by delivering faster data transfer rates, improved performance, compatibility with existing infrastructure, and enhanced reliability. Its introduction addressed the growing demands of data-intensive applications and played a pivotal role in the advancement of storage technologies during the early 2000s.

What does it mean if a drive has a workload of Enterprise (ENT)?

In the context of server solid state drives (SSDs), the term "Enterprise" refers to a specific class or category of SSDs that are designed and optimized for use in demanding and high-performance enterprise environments. Enterprise SSDs are engineered to provide high levels of reliability, endurance, and performance, making them suitable for use in data centers, cloud computing, and other business-critical applications.

Key characteristics of Enterprise SSDs include:

  1. Reliability: Enterprise SSDs are built to handle heavy workloads and extended operation times. They often incorporate features like power loss protection, advanced error correction, and predictive failure analytics to enhance data integrity and minimize the risk of data loss.

  2. Endurance: Enterprise SSDs are designed to withstand a high number of read and write cycles over their lifetime. This is achieved through the use of more durable NAND flash memory and advanced wear-leveling algorithms that evenly distribute data writes across the memory cells.

  3. Performance: These SSDs offer consistent and high levels of performance, including fast read and write speeds, low latency, and efficient I/O operations. They are optimized to handle mixed workloads and high IOPS (Input/Output Operations Per Second) requirements.

  4. Scalability: Enterprise SSDs are typically available in a range of capacities to suit the needs of various enterprise applications. They may also support advanced features like hot-swapping and online capacity expansion to accommodate growing storage demands.

The term "Enterprise" has been used in the SSD industry for quite some time, but the specific features and optimizations associated with Enterprise SSDs have evolved as technology has advanced. There isn't a single release date for Enterprise SSDs because they have been introduced gradually over multiple generations of SSD technology.

Enterprise SSDs represented an important advancement in technology for several reasons:

  1. Reliability: Enterprise SSDs are designed with a focus on data integrity and operational stability. This is crucial in environments where system downtime and data loss can have significant financial and operational impacts.

  2. Performance: Enterprise SSDs deliver high and consistent performance levels, which is crucial for meeting the demanding requirements of enterprise applications, including large-scale databases, virtualization, and real-time analytics.

  3. Endurance: The increased endurance of Enterprise SSDs ensures that they can handle sustained and heavy workloads without suffering from rapid wear-out, making them suitable for applications with high write-intensive workloads.

  4. Scalability: Enterprises need storage solutions that can grow with their needs. Enterprise SSDs often offer a range of capacities and features that facilitate easy expansion and integration into existing infrastructure.

In summary, "Enterprise" in the context of server SSDs refers to a class of drives tailored for the reliability, endurance, performance, and scalability requirements of enterprise-level applications. This concept has evolved over time as SSD technology itself has evolved, and it continues to be a crucial aspect of modern data center and business computing infrastructure.


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