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Western Digital SN5000 1 TB (Kioxia BiCS5 TLC 512Gb HDR)

1 TB
Capacity
Polaris 3
Controller
TLC
Flash
PCIe 4.0 x4
Interface
M.2 2280
Form Factor
Front
The Western Digital SN5000 is a solid-state drive in the M.2 2280 form factor, launched in June 2024. It is available in capacities ranging from 500 GB to 2 TB. This page reports specifications for the 1 TB variant. With the rest of the system, the Western Digital SN5000 interfaces using a PCI-Express 4.0 x4 connection. The SSD controller is the Polaris 3 A101-000171-A1 from WD, a DRAM cache is not available. Western Digital has installed 112-layer TLC NAND flash on the SN5000, the flash chips are made by Kioxia. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are absorbed more quickly. Thanks to support for the fast PCI-Express 4.0 interface, performance is excellent. The SN5000 is rated for sequential read speeds of up to 5,150 MB/s and 4,900 MB/s write; random IO reaches 730K IOPS for read and 770K for writes.
At its launch, the SSD was priced at 90 USD. The warranty length is set to five years, which is an excellent warranty period. Western Digital guarantees an endurance rating of 600 TBW, a typical value for consumer SSDs.

Solid-State-Drive

Capacity: 1 TB (1000 GB)
Variants: 500 GB 1 TB 2 TB
Overprovisioning: 92.7 GB / 10.0 %
Production: Active
Released: Jun 2024
Price at Launch: 90 USD
Part Number: WDS100T4B0E
Market: Consumer

Physical

Form Factor: M.2 2280 (Single-Sided)
Interface: PCIe 4.0 x4
Protocol: NVMe 1.4
Power Draw: Unknown

Controller

Manufacturer: WD
Name: Polaris 3 A101-000171-A1
Architecture: ARM Cortex-R
Foundry: TSMC FinFET
Process: 16 nm
Flash Channels: 4 @ 2,400 MT/s
Chip Enables: 4
Controller Features: HMB (enabled)

NAND Flash

Manufacturer: Kioxia
Name: BiCS5 HDR
Type: TLC
Technology: 112-layer
Speed: 1600 MT/s
Capacity: 2 chips @ 4 Tbit
Toggle: 4.0
Topology: Charge Trap
Dies per Chip: 8 dies @ 512 Gbit
Planes per Die: 2
Word Lines: 128 per NAND String
87.5% Vertical Efficiency
Read Time (tR): 56 µs
Program Time (tProg): 484 µs
Die Read Speed: 571 MB/s
Die Write Speed: 66 MB/s
Endurance:
(up to)		 3000 P/E Cycles
(100000 in SLC Mode)
Page Size: 16 KB
Block Size: 1344 Pages
Plane Size: 448 Blocks

DRAM Cache

Type: None
Host-Memory-Buffer (HMB): 64 MB

Performance

Sequential Read: 5,150 MB/s
Sequential Write: 4,900 MB/s
Random Read: 730,000 IOPS
Random Write: 770,000 IOPS
Endurance: 600 TBW
Warranty: 5 Years
MTBF: 1.8 Million Hours
Drive Writes Per Day (DWPD): 0.3
SLC Write Cache: Yes

Features

TRIM: Yes
SMART: Yes
Power Loss Protection: No
Encryption:
  • TCG Pyrite
RGB Lighting: No
PS5 Compatible: Yes

Notes

NAND Die:

Although this Die is a 4-plane design, most Kioxia BiCS5 NAND Dies used in most SSDs are dual planes design because of Yield and production cost.
And because of the die being dual-plane the Throughput is cut in half to 66 MB/s per die.
There is no CuA (Circuitry under Array) in the Dual-Plane variant.
Typical Endurance: 1700 P.E.C.
Rated Endurance: 5.000 (up to) P.E.C.
Jun 30th, 2024 07:35 EDT change timezone

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