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How to recover Samsung 980 PRO TurboWrite Performance in a Windows Environment

Written by Support Team

Updated at February 25th, 2021

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1. Test Background

Samsung officially states that the sequential write performance of Samsung 980 Pro 1TB SSD’s, after exhausting the smart TurboWrite buffer, is 2000MB/s.

 

We conducted a series of tests to verify these specifications, and to identify ways to restore Turbo Wrote performance to an array comprised of Samsung 980 PRO SSD’s. Customers can follow the procedure outlined below to test their configuration.

2. Test System:

System

GIGABYTE X570 AROUS MASTER

CPU

AMD Ryzen 9 3900X 12-Core Processor

Memory

32GB

OS

Win 10 64bit

Adapter

SSD7505

Disk

Samsung 980 PRO 1TB *2

Tool

IOmeter1.1.0

http://www.iometer.org/

 

Test Script

  

 

3. Test Procedure

TurboWrite maximum test:

a. Connect 2x Samsung 980 PRO SSD’s to the SSD7505. IOMeter will be used to test performance with a Windows 10 system, (RAID 0 comrised of 2x NVMe SSD’s), using a 2M-Seq-Write script.

b. Use Iometer to test and set different Maximum Disk Size values to determine the TurboWrite buffer size of the Samsung 980 PRO SSD.

c. Maximum Disk Size calculation formula: Using a 6GB write session as an example;

6GB=6*1024*1024*1024/512B=12582912

IOmeter Settings:

 

 

4. TurboWrite Performance Recovery Time Test

a. For Write data that is greater than the maximum value of TurboWrite, but not more than 70% of the total capacity:

Wait for 40/50/60min; this will will restore Turbo Write to the default value (full performance)

 

5. Test Results

a. TurboWrite maximum value:

Queue Depth=64

Data Pattern

(Maximum Disk Size)

2M-Seq-Write(MB/s)

RAID0 with 2 NVMes

(2worker)

12GB (25,165,824)

10029

216GB (452,984,832

10012

220GB (461,373,440)

10017

221GB (463,470,592)

10015

222GB (465,567,744)

4004

224GB (469,762,048)

3898

228GB (478,150,656)

3812

 

b. TurboWritePerformance Recovery Time

 

RAID0 with 2 x NVMe SSD’s (1worker)

First test session: 120G

Second test session: 111G

Test Session (40 Min)

Performance (MB/s)

Screenshot (IOMeter)

1

3848

2

3972

Test Session (50 Min)

Performance (MB/s)

Screenshot (IOMeter)

1

3823

2

6119

 

 

Test Session (60 min.)

Performance (MB/s)

Screenshot (IOmeter)

1

3849

2

9905

 

6. Test conclusions

a. HPT RAID0 (2 Drives): The critical value of TurboWrite buffer is about 221GB. 

  • Less than or equal to 221GB: normal Sequential write performance. A RAID0 can reach 10GB/s.
  • Greater than 221GB: Sequential performance will be reduced to about 3800MB/s

b. TubroWrite performance recovery:

RAID0: By waiting 60min to refresh the TurboWrite area, transfer performance will be restored to 9.9G. 

 

 

 

ssd7505 ssd7540 ssd7500 series turbo write turbowrite samsung 980 pro

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