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IRDM CX400 Gen.2 256 GB (Toshiba BiCS4)

256 GB
Capacity
Phison S11
Controller
TLC
Flash
SATA 6 Gbps
Interface
2.5"
Form Factor

Multiple hardware versions found.

Performance could vary due to unannounced flash/controller changes.

SSD Controller
Controller
NAND Die
NAND Die
The IRDM CX400 Gen.2 was a solid-state drive in the 2.5" form factor, that is no longer in production. It is only available in the 256 GB capacity listed on this page. With the rest of the system, the IRDM CX400 Gen.2 interfaces using a SATA 6 Gbps connection. The SSD controller is the PS3111-S11-13 from Phison, a DRAM cache is not available. IRDM has installed 96-layer TLC NAND flash on the CX400 Gen.2, the flash chips are made by Toshiba. Please note that this SSD is sold in multiple variants with different NAND flash or controller, which could affect performance, the "Notes" section at the end of this page has more info. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are soaked up more quickly. The cache is sized at 30 GB. The CX400 Gen.2 is rated for sequential read speeds of up to 550 MB/s and 480 MB/s write; random IOPS reach up to 65K for reads and 61K for writes.
The SSD's price at launch is unknown. The warranty length is set to three years, which is above average, but shorter than the five years offered by many other vendors. IRDM guarantees an endurance rating of 180 TBW, a good value.

Solid-State-Drive

Capacity: 256 GB
Hardware Versions:
Overprovisioning: 17.6 GB / 7.4 %
Production: End-of-life
Released: Unknown
Part Number: SSDPR-CX400-256-G2
Market: Consumer

Physical

Form Factor: 2.5"
Interface: SATA 6 Gbps
Protocol: AHCI
Power Draw: Unknown

Controller

Manufacturer: Phison
Name: PS3111-S11-13
Architecture: ARM 32-bit
Core Count: Single-Core
Frequency: 200 MHz
Foundry: UMC
Process: 40 nm
Flash Channels: 2
Chip Enables: 8

NAND Flash

Manufacturer: Toshiba
Name: BiCS4
Type: TLC
Technology: 96-layer
Speed: 800 MT/s
Capacity: Unknown
ONFI: 4.0
Toggle: 3.0
Topology: Charge Trap
Process: 19 nm
Die Size: 86 mm²
(6.0 Gbit/mm²)
Planes per Die: 2
Decks per Die: 2
Word Lines: 109 per NAND String
88.1% Vertical Efficiency
Read Time (tR): 58 µs
Program Time (tProg): 561 µs
Die Read Speed: 551 MB/s
Die Write Speed: 57 MB/s
Endurance:
(up to)
3000 P/E Cycles
(30000 in SLC Mode)
Page Size: 16 KB
Block Size: 1152 Pages
Plane Size: 1822 Blocks

DRAM Cache

Type: None

Performance

Sequential Read: 550 MB/s
Sequential Write: 480 MB/s
Random Read: 65,000 IOPS
Random Write: 61,440 IOPS
Endurance: 180 TBW
Warranty: 3 Years
MTBF: 2.0 Million Hours
Drive Writes Per Day (DWPD): 0.6
SLC Write Cache: approx. 30 GB

Features

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

Reviews

Same Drive

This section lists other SSDs in our database using the exact same hardware components

Notes

Controller:

In order to improve performance, Phison implemented a way that the controller utilizes it's internal 32 MiB of SRAM as some kind of "Pit-stop" that is allocated for incoming Write request in order to improve performance since it's a very quick to access and fast RAM. This implementation was called Smart Cache Flush.
This SmartCacheFlush technology allows incoming data to only have a “pit stop” in the cache and then move to the NAND flash at once. If the flash is jammed due to particular file sizes (such as random 4KB data), the cache will be treated as an “organizer”, consolidating incoming data into groups before written into the flash to improve write amplification.

NAND Die:

Read latency tR: 58 µs (ABL)
tPROG with ~ 25% Overhead: ~ 750 µs (Avg - 42.7 MB/s per each die)

Jun 1st, 2024 15:23 EDT change timezone

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