HGST Launches Ultrastar DC SS530 SSDs: 3D TLC NAND, 15.36 TB, SAS 12 Gbps

Western Digital has quietly added its new HGST Ultrastar DC
SS530-series SSDs to its lineup of products. The new drives are
aimed at mission-critical storage applications, such as
financial transactions, e-commerce, virtualization, database
analytics, etc. that use an SAS interface. The new SSDs carry
up to 15.36 TB of user-accessible flash onboard and offer three
endurance options to address read-intensive, mixed-use, as well
as write-intensive workloads.

Ultrastar DC SS530 is based on the same proprietary
controller architecture as the previous-generation
Ultrastar SS300 drives (i.e., the controller was presumably
co-designed with Intel), but the new one is based exclusively
for second-gen 3D TLC NAND, whereas previously the manufacturer
used both 3D TLC and 3D MLC memory. Features of the controllers
used for the DC SS530 and the SS300 are similar too and include
an extended error correction code (ECC with a 1×10^-17 bit
error rate) to enable higher performance and data integrity,
exclusive-OR (XOR) parity (in case a whole NAND die fails) as
well as parity-checked internal data paths. Besides, the new DC
SS530 complies with the T10 Data
Integrity Field (DIF)
standard, which requires all interconnect buses to have parity
protection (on the system level), as well as a special power
loss data management feature that does not use supercapacitors.

Western Digital’s Ultrastar DC SS530 come in 2.5-inch/15-mm
form-factor, feature an SAS 12 Gbps single-port/dual-port
interface and are drop-in compatible with existing servers that
support 9, 11, and 14 W per drive power options. The
manufacturer will also offer a variety of the Ultrastar DC
SS530 models supporting capabilities like TCG encryption,
TCG+FIPS, and instant secure erase to comply with different
security requirements.

When it comes to sustained sequential performance, the
Ultrastar DC SS530 drives offer up to 2254 MB/s read speeds as
well as up to 2223 MB/s write speeds, which is slightly faster
when compared to the Ultrastar SS300. Random read performance
of all DC SS530 hits 440,000 IOPS, about 10% higher than the
predecessor. When it comes to random writes, the SSDs rated for
10 DWPD (drive writes per day) can hit 320,000 IOPS, whereas
the high-capacity drives rated for 1 DWPD can hit 100,000 IOPS.
Given the fact that the DC SS530 support three power options,
end users can choose between higher IOPS performance and lower
power consumption (i.e., faster drives consume more energy).

It is noteworthy that within its new Ultrastar DC SS530 family
of SSDs Western Digital no longer offers drives rated for less
than 1 DWPD, thus addressing only ‘classic’ enterprise
applications with various workloads rather than solutions that
are extremely read intensive. As for warranty and MTBF, the new
SSDs are rated for 2.5 million hours MTBF and are covered with
a five-year limited warranty (or the max PB written, whichever
occurs first).

Western Digital’s Ultrastar DC SS530 are listed on the
company’s website, so chances are that the SSDs are already
available to at least some of its customers.

HGST Ultrastar DC HC530 Series Specifications
Capacities 400 GB
800 GB
1,600 GB
3,200 GB
400 GB
800 GB
1,600 GB
3,200 GB
6,400 GB
480 GB
960 GB
1,920 GB
3,840 GB
7,680 GB
15,360 TB
Form Factor 2.5″/15mm
Interface SAS 6/12 Gb/s, dual port for 12 Gb/s
Controller Proprietary
Sequential Read 2254 MB/s
Sequential Write 2223 MB/s
Random Read (4 KB) IOPS 440,000
Random Write (4 KB) IOPS 320,000 240,000 100,000
Mixed Random R/W (70:30 R:W, 4KB)
430,000 330,000 190,000
Read/Write Latency 92/26 92/27 92/36
Power Idle 3.2 W (average)
Operating 9 W, 11 W, 14 W (configurable)
Endurance DWPD 10 3 1
Max. PB 400 GB: 7.3 PB
800 GB: 14.6 PB
1.6 TB: 29.2 PB
3.2 TB: 58.4 PB
400 GB: 2.19 PB
800 GB: 4.38 PB
1.6 TB: 8.76 PB
3.2 TB: 17.52 PB
480 GB: 0.87 PB
960 GB: 1.75 PB
1.92 TB: 3.5 PB
3.84 TB: 7 PB
7.68 TB: 14 PB
Encryption AES-256 (?)
Power Loss Protection Yes
MTBF 2.5 million hours
Warranty Five years or max PB written (whichever occurs first)
Models WUSTM3232ASS20x WUSTM3216ASS20x WUSTM3280ASS20x
Legend for Model Numbers W = Western Digital
U = Ultrastar
S = Standard
TM=TLC/mainstream endurance
TR= TLC/read-intensive
32 = Full capacity (3.2TB)
32 = Capacity of this model
(15=15.2 TB, 76=7.6TB, 38=3.84TB 32=3.2TB, 19=1.92TB,
96=960GB, 80=800GB, 48=480GB, 40=400GB)
A = Generation code
S = Small form factor (2.5″ SFF)
S2 = Interface, SAS 12Gb/s

x in Model Number denotes Encryption level:
0 = Instant Secure Erase
1 = TCG Encryption
4 = No Encryption, Secure Erase
5 = TCG + FIPS

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Freeman Addico

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