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Brochure
Samsung SSD
PM1725a
Exceptionally fast speeds and ultra-low latency for enterprise servers
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Brochure
Extreme performance from an SSD technology leader
Maximize data transfer with the high-performance,
reliable PM1725a
Enterprise environments have unique requirements to ensure
that they operate optimally 24/7, 365 days a year. A varied level
of performance with low latency is essential.
It is also critical that these environments remain stable when
processing various read and write workloads. And the most
crucial criteria of all are protection from data corruption or loss
due to unexpected power outages.
Considering each of these factors, IT and data center managers
are tasked with nding high performing, dependable memory
solutions.
Samsung is well-equipped to offer enterprise environments
superb SSDs. The drives deliver exceptional performance in
multithread applications, such as compute and virtualization,
relational databases, and storage.
These high-performing SSDs also provide outstanding
reliability for continual operation regardless of unanticipated
power loss. Their reliability also extends to non-interrupt
service in case a failure occurs on one of the paths to a port.
Using its proven expertise and wealth of experience in cutting-
edge SSD technology, Samsung memory solutions helps data
centers operate continually at the highest performance levels.
Samsung has the added advantage of being the sole
manufacturer of all of its SSD components. This advantage
helps ensure end-to-end integration, quality assurance and the
utmost compatibility.
Samsung PM1725a NVMe SSD delivers:
• Exceptional value: The PM1725a utilizes Samsung V-NAND
ash memory, which features a unique design that stacks
48 layers on top of another. It also employs cost-effective
TLC (triple-level cell) ash memory, which delivers higher
reliability than MLC (multi-level cell) planar NAND ash
memory SSDs. With this architecture, the PM1725a can
deliver enterprise-level performance economically.
• Consistently high performance: The PM1725a HHHL (half-
height, half-length) card delivers a wide bandwidth of up
to 6,400/3,000 MB/s sequential R/W speeds respectively,
using under 23 W of power. It delivers up to 1,080K and
170K IOPS for random 4KB read and write, respectively.
The PM1725a 2.5-inch SSD delivers a bandwidth of up to
3,300/2,950 MB/s for sequential R/W and up to 800K/160K
IOPS for random 4KB R/W, respectively. The PM1725a
delivers QoS (quality of service, 99%) of 95μs for random
4KB reads and 60μs for random 4KB writes.
• Outstanding reliability: Even though the PM1725a employs
a TLC V-NAND ash memory, it boasts 5 DWPD (drive
writes per day) for 5 years. This rate translates to writing
a total of 32 TB each day during that time, which means
users can write 6,400 les of 5 GB-equivalent data every
day. This level of reliability is more than sufcient for
enterprise storage systems that have to perform ultrafast
transmissions of large amounts of data.
• High density: By tting more memory cells in less space
in a V-NAND chip, it provides signicantly more capacities
of up to 6.4 TB in both the PM1725a 2.5-inch and HHHL
card SSDs. Depending on your storage requirements and
applications, 800 GB, 1.6TB, 3.2 TB and 6.4 TB capacities are
available.
Optimized for enterprise environments
The Samsung PM1725a SSD is optimized to excel in virtually
any data center scenario. This enterprise-level, ultra-
high performance SSD provides unsurpassed random read
performance and is particularly suitable for read-intensive data
center applications. When compared with other standardized
Samsung SSDs, the PM1725a SSD provides the highest random
read IOPS performance.
The PM1725a is equipped with Samsung 3rd-generation TLC
V-NAND technology. This technology eliminates performance
and reliability issues that result from capacity limitations
found in planar NAND technologies.
The Samsung V-NAND technology delivers reliable and
consistent performance at lower costs for today's demanding
data-centric world.
Superb performance over SAS SSDs
The PM1725a uses a state-of-the-art NVMe interface to
overcome bottlenecks experienced in SAS (serial-attached
SCSI) and SATA interfaces. Furthermore, the PM1725a employs
the highest density to successfully process intensive and heavy
enterprise workloads.
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SamsungPM1725aputsanendtoperformanceandefciencybottlenecks
The following gures compare the performance of a Samsung
enterprise SAS SSD, which uses MLC V-NAND ash memory,
with the TLC-based PM1725a. With comparable cost, the
PM1725a provides up to 4.3 times more bandwidth than the
MLC-based SAS SSD for sequential read and up to 5 times more
IOPS for 4 KB random read.
MB/s
4.3×
60001000K
64001080K
SAS SS D 1.6 TB (MLC)
PM17 25a 1.6 TB ( TLC)
PM17 25a 3.2 TB ( TLC)
1.4×
3000170K
2000120K
1400200K
Seq. read
Figure 1. Sequential R/W performance comparison between an MLC SAS SSD and the 1.6 and 3.2
TB TLC PM1725a
K IOPS
140050K
Seq. write
power failure, the PLP solution can help ensure that data issued
by the host system is written to the storage media to reduce
the risk of loss of data.
Dual-port capability
IT and data center managers need features that can provide
access to storage data without interruptions.
Samsung has taken this need into consideration by including
a key feature that provides access by smartly using dual-
port PCIe
performance enterprise applications.
Samsung has enabled this feature in the PM1725a 2.5-inch
drives, which provides the ability to create two fault domains
and increases availability, providing non-interrupt service for
accessing storage data.
Even if a failure occurs in one of the paths to a port, preventing
access along that path, the device is still accessible using the
second port. The PM1725a provides virtually non-stop service
with this dual-port feature support.
®
(PCI Express®) SSDs to get the most out of high-
5.0×
2.4×
Sustained random read
Figure 2. Sustained random R/W performance comparison between an MLC SAS SSD and the 1.6
and 3.2 TB PM1725a
Enterprise-grade power-loss protection
During normal power-off periods, the host server allocates
time to maintain data integrity by transmitting standby
commands to each device. In the event of an unexpected power
loss, though, the SSD immediately uses the stored energy from
tantalum capacitors to provide enough time to transfer the
cached data in DRAM to the ash memory. This process helps
ensure no loss of data.
Power loss can occur with power outages or when users unplug
devices from the system. However, the PM1725a NVMe SSD has
been designed to prevent data loss with its PLP (power-loss
protection) architecture. In the event of sudden power off or
Sustained random write
SR-IOV support
SR-IOV (single-root I/O virtualization) is a PCI-SIG® specication
for I/O virtualization. It provides a standard mechanism for
devices to advertise their ability to be simultaneously shared
among multiple VMs (virtual machines).
I/O Forwarding
Server Server
Up
Switch1 Switch2
x2 x2
SSD1 SSD2 SSD24
Figure 3. High availability with the Samsung dual-port NVMe SSD
Up
...
Power off
Recover within
Performance
a few sec
Time
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SamsungSSDToolkitprovidessimpliedmanagementanddiagnostics
It also allows for the partitioning of a PCI® function into many
virtual interfaces for the purpose of sharing the resources of a
PCIe device in a virtual environment.
PM1725a drives support SR-IOV, which enables the efcient
sharing of PCIe devices among virtual machines running on
the same host. Hypervisor overhead is reduced by providing an
independent, direct I/O path between VMs and devices.
The PM1725a can attain its maximum random read
performance, even in a virtualized environment, using SR-IOV.
Also the direct I/O path between VMs and devices eliminates
hypervisor bottlenecks, as illustrated in the gure below.
VM1
Hypervisor
VM2
Virtual memory
Physical memory
PCIe
VF* VF* PF*
Controller
NVM pool
NVMe SSD
(w/ SR-IOV)
Remote health monitoring
The PM1725a provides a remote health-monitoring feature
by the Samsung SSD Toolkit. The Samsung SSD Toolkit is
proprietary software designed to help users with easy-to-use
SSD management and diagnostic features for server and data
center usage.
The CLI (command line interface) tool currently supports
Samsung data center and enterprise NVMe SSDs and supports
®
.
Linux
The Samsung SSD Toolkit is available from the Samsung SSD
website. Remote health monitoring features:
• Health monitoring: Provides vital drive status information
and supports users to update rmware, measure drive
performance, initialize drives, calculate drive lifetime and
more.
• Remote health monitoring for FA (failure analysis): Provides
a smart way for resolving eld issues by the remote health
monitoring feature. This way of issue handling reduces
turnaround time compared to the traditional way of
handling the issue, such as dispatching an engineer, and
provides quicker resolution. The customer can get the initial
resolution in two steps: rst by running the SSD Toolkit and
second by sending the debug information back to Samsung
and getting the resolution effectively.
1. http://www.samsung.com/global/business/semiconductor/minisite/SSD/global/html/
support/server_downloads.html
* VF: Virtual function * PF: Physical function
Figure 4. PM1725a SSD usage in SR-IOV environments
Multi-namespace
The PM1725a supports multiple namespaces, where a single
SSD can be partitioned into multiple hardware partitions. A
namespace can be assigned to multiple hosts or dedicated
to a single host. The PM1725a supports up to 32 multiple
namespaces.
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Specications
Samsung PM1725a
Form factor
Capacity
2
Host interface
Spec compliance
NANDashmemory
MTBF
UBER
Power consumption
Endurance
Sequential read 4
Sequential write
Random read
2.5 inch HHHL
800 GB, 1.6 TB, 3.2 TB, 6.4 TB 1.6 TB, 3.2 TB, 6.4 TB
PCI Express Gen3 x 4 PCI Express Gen3 x 8
PCI Express base specication rev. 3.0, NVM Express spec rev. 1.2, enterprise SSD form factor ver. 1.0a
Samsung V-NAND
2,000,000 hours
1 sector per 1017 bits read
3
Up to 3,300 MB/s Up to 6,400 MB/s
Up to 2,950 MB/s Up to 3,000 MB/s
Up to 800,000 IOPS Up to 1,080,000 IOPS
Active: 23 Watt, Idle: 7.7 Watt
5 DWPD for 5 years
Random write
Latency, read/write
Quality of Service, read/write (99%)
5
6
Physical dimensions
Weight
2. 1 MB = 1,000,000 Bytes, 1 GB = 1,000,000,000 Bytes, 1 TB = 1,000,000,000,000 Bytes, unformatted capacity.
®
3. Active power is measured using IOMeter-2006 on Microsoft
4. Based on PCI Express Gen3 x 4 for 2.5-inch and PCI Express Gen3 x 8 for HHHL card SSD. Random performance measured using Fio
sequential performance with queue depth 32 by 16 workers. Actual performance may vary depending on use conditions and environment.
5. The read latency is measured by using Fio in CentOS 7.0 and 4 KB transfer size with queue depth 1 on a random workload of sustained state. The write latency is measured by using Fio in CentOS 7.0
and 4 KB transfer size with queue depth 1 on a sequential workload of sustained state.
6. QoS is measured using FIO (99%) with queue depth 1 on 4KB random read and write.
Windows® Win Server 2012 R2.
Up to 160,000 IOPS Up to 170,000 IOPS
90/20 µs
95/60 µs
69.85 x 100.20 x 14.80 mm 69.90 x 167.65 x 18.71 mm
Up to 190 grams Up to 330 grams
®
in CentOS® 7.0 with queue depth 32 by 16 workers and
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Legal and additional information
About Samsung Electronics Co., Ltd.
Samsung Electronics Co., Ltd. inspires the world and shapes
the future with transformative ideas and technologies. The
company is redening the worlds of TVs, smartphones,
wearable devices, tablets, cameras, digital appliances, printers,
medical equipment, network systems, and semiconductor and
LED solutions. For the latest news, please visit the Samsung
Newsroom at news.samsung.com.
For more information
For more information about the Samsung Semiconductor, visit
samsung.com/semiconductor.
Copyright © 2016 Samsung Electronics Co., Ltd. All rights reserved. Samsung is a
registered trademark of Samsung Electronics Co., Ltd. Specications and designs
are subject to change without notice. Nonmetric weights and measurements
are approximate. All data were deemed correct at time of creation. Samsung is
not liable for errors or omissions. All brand, product, service names and logos
are trademarks and/or registered trademarks of their respective owners and are
hereby recognized and acknowledged.
CentOS is a trademark of Red Hat, Inc.
Fio is a registered trademark of Fio Corporation.
Linux is a registered trademark of Linus Torvalds.
Microsoft and Windows are registered trademarks of Microsoft Corporation in the
United States and/or other countries.
PCI, PCI Express, PCIe and PCI-SIG are registered trademarks of PCI-SIG.
Samsung Electronics Co., Ltd.
129 Samsung-ro,
Yeongtong-gu,
Suwon-si, Gyeonggi-do 16677,
Korea
www.samsung.com
2016-08
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