Description
Capacity and Performance
Capacity refers to the amount of storage space available on a hard drive. It is measured in units such as bytes, megabytes (MB), gigabytes (GB), or terabytes (TB). The Dell 400-ASID 8TB SAS 12 Gbps 7.2K RPM 512E LFF Hard Drive has a capacity of 8 terabytes, which is a large amount of storage space that can store a large amount of data.
Performance, on the other hand, refers to how quickly and efficiently the hard drive can read and write data. There are several factors that affect performance, including:
- Rotational speed: measured in revolutions per minute (RPM), which determines how fast the disk platters spin. A higher RPM means faster data access.
- Interface speed: measured in Gbps, which determines how quickly data can be transferred between the hard drive and the host.
- Form factor: the physical size of the hard drive. Larger form factors can accommodate more disk platters, which can increase storage capacity but may also affect performance.
- Error correction and data protection: features that help protect data from errors or failures.
The Dell 8TB SAS 12 Gbps 7.2K RPM 512E LFF Hard Drive has a rotational speed of 7.2K RPM, which is a bit slower than the 10K RPM or 15K RPM of enterprise-grade drives, but it still provides good performance for most workloads. The drive also has a SAS 12 Gbps interface, which provides fast data transfer rates, and a large form factor (LFF) which allows it to accommodate more disk platters. The 512E is a technology that allows the disk drive to be compatible with older servers that only support 512 bytes per sector.
SAS Interface and Data Transfer Rate
SAS (Serial Attached SCSI) is a type of interface used to connect storage devices, such as hard drives and solid state drives, to a computer or server. It is a point-to-point interface, which means that each SAS device has its own dedicated connection to the host, rather than sharing a common bus like with SATA. This allows for greater scalability and performance.
The SAS interface uses a standard known as SCSI (Small Computer System Interface) for data transfer. SCSI is a set of commands and protocols that allow for efficient communication between the host and the storage device. The SAS interface also supports advanced features such as multi-path and redundancy, which increase reliability and availability.
SAS data transfer rates, also known as the interface speed, are measured in Gbps (gigabits per second). The current standard for SAS is 12 Gbps, which allows for faster data transfer speeds and improved performance compared to previous versions such as SAS 6 Gbps and SAS 3 Gbps.
It’s worth noting that SAS hard drives can be also backwards compatible with SAS 3 Gbps and SAS 6 Gbps interfaces, but at the cost of performance.
Rotational Speed and Form Factor
Rotational speed, measured in revolutions per minute (RPM), refers to how fast the disk platters inside a hard drive spin. The faster the platters spin, the quicker data can be accessed. The Dell 400-ASID 8TB SAS 12 Gbps 7.2K RPM 512E LFF Hard Drive has a rotational speed of 7.2K RPM. This speed is considered “nearline” or “archival” and is slower than the enterprise-grade hard drive that typically have 10K or 15K RPM. This means that the hard drive will take slightly longer to access data, but it still provides good performance for most workloads.
Form factor, on the other hand, refers to the physical size and shape of a hard drive. The Dell 8TB SAS 12 Gbps 7.2K RPM 512E LFF Hard Drive has a “large form factor” (LFF) which means it is larger than the standard “small form factor” (SFF) hard drive. The larger size allows it to accommodate more disk platters which increases storage capacity. However, it also means that the hard drive takes up more space and may not fit in all types of servers.
The LFF hard drive is typically used in large-scale storage systems, data centers, and other environments where high capacity is important. In addition, LFF hard drives are also used in situations where multiple hard drives are installed in a single server, such as in a RAID configuration, where the larger size allows for better cooling and airflow.
It’s worth noting that LFF hard drives are also compatible with servers that have large drive bays, and can be a good option for those who need more storage space in a single drive, but it may not be the best option for those with space constraints.
Main Specification abou the Dell 400-ASID
- Manufacturer: Dell
- Part Number or SKU # 400-ASID
- Device Type: Hard Drive
Specifications
- Storage Capacity : 8 TB
- Drive Dimensions : 3.5 Inch
- Interface : SAS-12GBPS
- Features : Advanced Format 512e
Performance
- Spindle Speed : 7.2K RPM
- Drive Transfer Rate : 1200 MBPS (External)
- Interfaces : 1 X Serial Attached SCSI – 12GBPS
- Compatible Bays : 1 X Hot-Swap – 3.5inch
Dimension and Weight
- Width : 4 Inch
- Depth : 5.8 Inch
- Height : 1 Inch
- Weight : 1.52 Lbs
Compatibility
- Poweredge C6420
- Poweredge R440
- Poweredge R540
- Poweredge R640
- Poweredge R6415
- Poweredge R740
- Poweredge R740xd
- Poweredge R7415
- Poweredge R7425
Contact us or ask for live chat/help if you have any questions about the compatibility of this item to ensure the model’s matching features with your current system.
