Part Number Information - Lenovo 7SD7A05779 Product Manual

Part number information

The following table lists the ordering part numbers and feature codes for the SSDs.
Table 1. Ordering information
Part number Feature
Drives for ThinkSystem servers
7SD7A05779 B11C
7SD7A05778 B11D
7SD7A05777 B11E
Drives for System x, Flex System and NeXtSale servers
7SD7A05774 B11F
7SD7A05773 B11G
4XB7A08539 B1JK
The part numbers for the drives include the following items:
One drive with a hot-swap tray attached
Publication package
Features
Non-Volatile Memory Express (NVMe) is new PCIe 3.0 high performance SSD technology that provides
high I/O throughput and low latency. NVMe interfaces remove SAS/SATA bottlenecks and unleash all of
the capabilities of contemporary NAND flash memory. Each NVMe PCI SSD has direct PCIe 3.0 x4
connection, which provides at least 2x more bandwidth and 2x less latency than SATA/SAS-based SSD
solutions. NVMe drives are also optimized for heavy multi-threaded workloads by using internal parallelism
and many other improvements, such as enlarged I/O queues.
The Intel P4500 NVMe drives have the following key characteristics:
PCIe 3.0 connection for each NVMe drive
Ultra-low I/O latency, with an typical read latency of 10 µs and write latency of 13 µs
Suitable for read-intensive workloads
Available in capacities up to 4 TB
Variable sector size and end-to-end data-path protection
Enhanced power-loss data protection
Thermal throttling and monitoring
SMART health reporting
The key metric for solid state drives is their endurance (life expectancy). SSDs have a huge, but finite,
number of program/erase (P/E) cycles, which determines how long the drives can perform write operations
and thus their life expectancy. Performance SSDs have better endurance than Mainstream SSDs, which in
turn have better endurance than Entry SSDs.
SSD write endurance is typically measured by the number of program/erase cycles that the drive can incur
over its lifetime, which is listed as TBW in the device specification. The TBW value that is assigned to a
solid-state device is the total bytes of written data that a drive can be guaranteed to complete. Reaching
this limit does not cause the drive to immediately fail; the TBW simply denotes the maximum number of
writes that can be guaranteed.
Intel P4500 Entry NVMe PCIe 3.0 x4 SSDs
Description
ThinkSystem U.2 Intel P4500 1.0TB Entry NVMe PCIe3.0 x4 Hot Swap SSD
ThinkSystem U.2 Intel P4500 2.0TB Entry NVMe PCIe3.0 x4 Hot Swap SSD
ThinkSystem U.2 Intel P4500 4.0TB Entry NVMe PCIe3.0 x4 Hot Swap SSD
Intel P4500 1.0TB NVMe 2.5" Enterprise Entry PCIe SSD
Intel P4500 2.0TB NVMe 2.5" Enterprise Entry PCIe SSD
Intel P4500 4.0TB NVMe 2.5" Enterprise Entry PCIe SSD
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