Nvme Pcie Ssd Features; Hot Swap; Device Health; Self-Monitoring Analysis And Reporting Technology - Dell PowerEdge Express Flash NVMe PCIe SSD User Manual

NVMe PCIe SSD Features

The following topics describe the different features of the Dell PowerEdge Express Flash NVMe PCIe SSD.

Hot Swap

NOTE: To check if your operating system supports NVMe PCIe SSD hot swap, see
Operating Systems For NVMe PCIe
Dell PowerEdge Express Flash NVMe PCIe SSDs support orderly hot swap allowing you to add or remove
a device without halting or restarting the system in which the device is installed.
Dell-supported NVMe PCIe SSD hot swappable functions are defined below:
Orderly You insert a device into a running system where a similar device has not been
Insertion previously inserted from the time it was last booted. Dell systems that support
NVMe PCIe SSDs are configured to handle PCIe resource balancing in the event of
a hot insertion. This preset system configuration makes this type of hot insertion an
orderly operation.
Orderly You remove a device from a running system. Prior to physically removing the
Removal device, you must notify the system that the device is about to be removed. This
notification defines hot removal as an orderly operation.
Orderly Swap You remove a device from the system in an orderly fashion and replace it with a
supported device. The device that is removed and the device that replaced it use
the same device driver.
WARNING: Do not remove an NVMe PCIe SSD without notifying the system first. For more
information, see Preparing To Remove An NVMe PCIe
NOTE: Orderly hot swap is only supported when NVMe PCIe SSDs are installed in a supported Dell
system running a supported operating system. To ensure that you have the correct hardware setup
for your NVMe PCIe SSD, see the system specific Owner's Manual at dell.com/support/manuals.

Device Health

The Dell PowerEdge Express Flash NVMe PCIe SSD design is based on MLC NAND flash technology.
NAND SSDs have a finite number of program or erase cycles and a finite number of spare blocks
(replacements for other worn or faulty NAND blocks).
The program erase cycles and spare blocks are continuously monitored for each Dell PowerEdge Express
Flash NVMe PCIe SSD through various Dell software management applications. For more information see
Configuring And Managing Your NVMe PCIe

Self-Monitoring Analysis And Reporting Technology

The Self-Monitoring Analysis and Reporting Technology (SMART) feature-set minimizes unscheduled
system downtimes by providing a method of early detection of device degradation or fault. By monitoring
and storing critical performance and calibration parameters, the SMART feature set attempts to predict
degradation or fault conditions. Awareness of a negative reliability condition allows the host system to
warn you of an impending risk of device failure and advise on appropriate action.
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