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Seagate IronWolf 125 1 TB

1 TB
Capacity
Phison S12
Controller
TLC
Flash
SATA 6 Gbps
Interface
2.5"
Form Factor
Front
Back
Back
PCB Front
PCB Front
DRAM
DRAM
Flash
Flash
SSD Controller
Controller
NAND Die
NAND Die
The Seagate IronWolf 125 is a solid-state drive in the 2.5" form factor, launched in 2018. It is available in capacities ranging from 250 GB to 4 TB. This page reports specifications for the 1 TB variant. With the rest of the system, the Seagate IronWolf 125 interfaces using a SATA 6 Gbps connection. The SSD controller is the PS3112-S12-27 from Phison, a DRAM cache chip is available. Seagate has installed 96-layer TLC NAND flash on the IronWolf 125, the flash chips are made by Toshiba. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are absorbed more quickly. The IronWolf 125 is rated for sequential read speeds of up to 560 MB/s and 540 MB/s write; random IO reaches 95K IOPS for read and 90K for writes.
At its launch, the SSD was priced at 175 USD. The warranty length is set to five years, which is an excellent warranty period. Seagate guarantees an endurance rating of 1400 TBW, a good value.

Solid-State-Drive

Capacity: 1 TB (1000 GB)
Variants: 250 GB 500 GB 1 TB 2 TB 4 TB
Overprovisioning: 92.7 GB / 10.0 %
Production: Active
Released: 2018
Price at Launch: 175 USD
Part Number: ZA1000NM10002
Market: Consumer

Physical

Form Factor: 2.5" (Single-Sided)
Interface: SATA 6 Gbps
Protocol: AHCI
Power Draw: 0.13 W (Idle)
Unknown (Avg)
2.4 W (Max)

Controller

Manufacturer: Phison
Name: PS3112-S12-27
Architecture: ARM 32-bit
Core Count: Quad-Core
Frequency: 666 MHz
Foundry: TSMC
Process: 28 nm
Flash Channels: 8 @ 667 MT/s
Chip Enables: 4
Controller Features: DRAM (enabled)

NAND Flash

Manufacturer: Toshiba
Name: BiCS4
Part Number: TA7AG65AWV
Type: TLC
Technology: 96-layer
Speed: 533 MT/s .. 800 MT/s
Capacity: 8 chips @ 1 Tbit
Toggle: 3.0
Topology: Charge Trap
Process: 19 nm
Dies per Chip: 4 dies @ 256 Gbit
Planes per Die: 2
Decks per Die: 2
Word Lines: 109 per NAND String
88.1% Vertical Efficiency
Read Time (tR): 59 µs
Program Time (tProg): 625 µs
Die Read Speed: 551 MB/s
Die Write Speed: 56 MB/s
Endurance:
(up to)		 1500 P/E Cycles
(3000 in SLC Mode)
Page Size: 16 KB
Block Size: 1152 Pages
Plane Size: 1980 Blocks

DRAM Cache

Type: DDR3-1866 CL13
Name: Nanya NT5CC128M16JR-EK
Capacity: 256 MB
(1x 256 MB)
Organization: 2Gx16
Host-Memory-Buffer (HMB): N/A

Performance

Sequential Read: 560 MB/s
Sequential Write: 540 MB/s
Random Read: 95,000 IOPS
Random Write: 90,000 IOPS
Endurance: 1400 TBW
Warranty: 5 Years
MTBF: 1.8 Million Hours
Drive Writes Per Day (DWPD): 0.8
SLC Write Cache: Yes

Features

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

Reviews

Notes

Drive:

Although Seagate has re-branded the controller as "STXZA01F5578" it is manufactured by Phison and it is the model S12.

Controller:

2 main cores using Cortex-R5 clocked at 666 MHz with CoXProcessor technology (one additional dual-core) Cortex-R5 clocked at a lower clock for better efficience.

NAND Die:

Read latency tR: 58 µs (ABL)
Performance:
tPROG (typical) - 2100 µs (MSB)
tR (typical) - 59 µs
tPROG (ower page) ~ 200 µs
Estimated tPROG between 625 ~ 975 µs
Jun 1st, 2024 14:30 EDT change timezone

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