SSDs


Western Digital Seeks To Intervene In Toshiba's Sale Of Memory Business

Western Digital Seeks To Intervene In Toshiba’s Sale Of Memory Business

Western Digital, through its SanDisk subsidiary, is seeking arbitration to prevent Toshiba from selling off its stake in their flash memory joint venture without the consent of Western Digital. Toshiba has been suffering financially due to crippling losses incurred by its nuclear power division, and to offset those losses Toshiba has been working to sell off its memory business. Toshiba’s memory business is one of the most successful parts of the company and the Toshiba-SanDisk flash memory joint venture is one of the four major manufacturers of NAND flash memory.

When Toshiba announced in March their intentions to raise cash by selling a stake in their memory business, a bidding war emerged. Western Digital, Micron and SK Hynix all sought to expand their share of the NAND flash market, but Toshiba was reluctant to sell to a competitor, hoping to avoid a prolonged anti-trust regulatory approval process. The Japanese government also does not want to see the NAND flash business sold to a Chinese-controlled company. This left private equity firms as the bidders Toshiba was most receptive to, but other technology companies like Broadcom and Foxconn are bidding.

After failing to meet their goal of selling a 20% stake by the end of March, and as revised estimates made it clear that 20% would not cover Toshiba’s nuclear losses, Toshiba’s plans shifted toward a complete spin-off and sale of their Toshiba Memory division. As of February, Toshiba valued this unit at around $18B. In late March it was reported that Broadcom and Silver Lake Partners had jointly bid to buy Toshiba Memory for about that amount, then in early April Foxconn reportedly offered $27B. Broadcom has since increased their bid to $28B. SK Hynix and Bain Capital are reported to be jointly bidding up to $13.5B for a majority stake in Toshiba Memory.

The bids for Toshiba Memory have reached prices that are difficult but not necessarily impossible for Western Digital to match. Western Digital would need to fund an acquisition with significant debt, and other analysts have speculated that it may be better for Western Digital to pursue acquiring a majority stake in Toshiba Memory rather than a complete acquisition.

Western Digital does have leverage in their preexisting relationship with Toshiba as co-owner of their flash memory joint venture. Western Digital is alleging that Toshiba is required to obtain Western Digital’s consent before spinning off or selling Toshiba Memory, and that Toshiba’s actions so far have violated their agreements with Western Digital. Western Digital has initiated arbitration proceedings against Toshiba, seeking to block further action without Western Digital’s consent and to reverse the Toshiba Memory spin-off.

These arbitration proceedings are undoubtedly a major frustration to Toshiba, who badly want to close a deal two months ago. Instead, they are now faced with complicated litigation over the terms of at least three joint venture agreements with SanDisk that are now controlled by Western Digital. So far, Toshiba does not appear to have responded to the arbitration demand and Western Digital claims that Toshiba has indicated they have no intention to obtain consent before selling Toshiba Memory to the highest bidder. It is not clear how long this dispute could take to settle, but there is an initial 30-day window for Toshiba to respond before the conflict escalates. If Toshiba does agree to Western Digital’s arbitration request, estimates range from six months to two years for that process to resolve.

By stalling or blocking competing bids, Western Digital seems to be running out the clock on Toshiba with the goal of forcing them to accept a bid from Western Digital that would not be able to win in an open auction. The longer Western Digital can prevent Toshiba from closing a deal, the more desperate Toshiba will get to raise enough cash to keep the company as a whole afloat. Western Digital has not said whether they will file for an injunction if Toshiba does not agree to participate in arbitration, so there is still a lot of uncertainty about how severe this dispute will get and how long it will last. Analysts at J.P. Morgan are optimistic about Western Digital’s prospects in this dispute and are among several analysts to have upgraded their ratings of Western Digital in recent months.

Despite the dispute over corporate ownership rights, the day to day operations of the Toshiba/Western Digital NAND joint venture have been largely unaffected. Both Toshiba and Western Digital are in the process of bringing products to market using their 64-layer 3D NAND flash, which has a lower cost per bit and much higher density than their 15nm planar NAND. Western Digital predicts that 40% of their wafer output this year will be 3D NAND and 75% of that will be the 64-layer generation. Due to the ongoing industry-wide NAND flash shortage, all of the NAND produced by Toshiba and Western Digital is quite profitable and the companies are being judicious in allocating supply to the most lucrative market segments. There has been some speculation that as the dispute escalates Toshiba might deny Western Digital employees access to their fabs in Yokkaichi, Japan, but Western Digital says Toshiba has not taken any such action and Western Digital employees are continuing to work alongside Toshiba employees in research and development, manufacturing, and testing.

Western Digital Seeks To Intervene In Toshiba's Sale Of Memory Business

Western Digital Seeks To Intervene In Toshiba’s Sale Of Memory Business

Western Digital, through its SanDisk subsidiary, is seeking arbitration to prevent Toshiba from selling off its stake in their flash memory joint venture without the consent of Western Digital. Toshiba has been suffering financially due to crippling losses incurred by its nuclear power division, and to offset those losses Toshiba has been working to sell off its memory business. Toshiba’s memory business is one of the most successful parts of the company and the Toshiba-SanDisk flash memory joint venture is one of the four major manufacturers of NAND flash memory.

When Toshiba announced in March their intentions to raise cash by selling a stake in their memory business, a bidding war emerged. Western Digital, Micron and SK Hynix all sought to expand their share of the NAND flash market, but Toshiba was reluctant to sell to a competitor, hoping to avoid a prolonged anti-trust regulatory approval process. The Japanese government also does not want to see the NAND flash business sold to a Chinese-controlled company. This left private equity firms as the bidders Toshiba was most receptive to, but other technology companies like Broadcom and Foxconn are bidding.

After failing to meet their goal of selling a 20% stake by the end of March, and as revised estimates made it clear that 20% would not cover Toshiba’s nuclear losses, Toshiba’s plans shifted toward a complete spin-off and sale of their Toshiba Memory division. As of February, Toshiba valued this unit at around $18B. In late March it was reported that Broadcom and Silver Lake Partners had jointly bid to buy Toshiba Memory for about that amount, then in early April Foxconn reportedly offered $27B. Broadcom has since increased their bid to $28B. SK Hynix and Bain Capital are reported to be jointly bidding up to $13.5B for a majority stake in Toshiba Memory.

The bids for Toshiba Memory have reached prices that are difficult but not necessarily impossible for Western Digital to match. Western Digital would need to fund an acquisition with significant debt, and other analysts have speculated that it may be better for Western Digital to pursue acquiring a majority stake in Toshiba Memory rather than a complete acquisition.

Western Digital does have leverage in their preexisting relationship with Toshiba as co-owner of their flash memory joint venture. Western Digital is alleging that Toshiba is required to obtain Western Digital’s consent before spinning off or selling Toshiba Memory, and that Toshiba’s actions so far have violated their agreements with Western Digital. Western Digital has initiated arbitration proceedings against Toshiba, seeking to block further action without Western Digital’s consent and to reverse the Toshiba Memory spin-off.

These arbitration proceedings are undoubtedly a major frustration to Toshiba, who badly want to close a deal two months ago. Instead, they are now faced with complicated litigation over the terms of at least three joint venture agreements with SanDisk that are now controlled by Western Digital. So far, Toshiba does not appear to have responded to the arbitration demand and Western Digital claims that Toshiba has indicated they have no intention to obtain consent before selling Toshiba Memory to the highest bidder. It is not clear how long this dispute could take to settle, but there is an initial 30-day window for Toshiba to respond before the conflict escalates. If Toshiba does agree to Western Digital’s arbitration request, estimates range from six months to two years for that process to resolve.

By stalling or blocking competing bids, Western Digital seems to be running out the clock on Toshiba with the goal of forcing them to accept a bid from Western Digital that would not be able to win in an open auction. The longer Western Digital can prevent Toshiba from closing a deal, the more desperate Toshiba will get to raise enough cash to keep the company as a whole afloat. Western Digital has not said whether they will file for an injunction if Toshiba does not agree to participate in arbitration, so there is still a lot of uncertainty about how severe this dispute will get and how long it will last. Analysts at J.P. Morgan are optimistic about Western Digital’s prospects in this dispute and are among several analysts to have upgraded their ratings of Western Digital in recent months.

Despite the dispute over corporate ownership rights, the day to day operations of the Toshiba/Western Digital NAND joint venture have been largely unaffected. Both Toshiba and Western Digital are in the process of bringing products to market using their 64-layer 3D NAND flash, which has a lower cost per bit and much higher density than their 15nm planar NAND. Western Digital predicts that 40% of their wafer output this year will be 3D NAND and 75% of that will be the 64-layer generation. Due to the ongoing industry-wide NAND flash shortage, all of the NAND produced by Toshiba and Western Digital is quite profitable and the companies are being judicious in allocating supply to the most lucrative market segments. There has been some speculation that as the dispute escalates Toshiba might deny Western Digital employees access to their fabs in Yokkaichi, Japan, but Western Digital says Toshiba has not taken any such action and Western Digital employees are continuing to work alongside Toshiba employees in research and development, manufacturing, and testing.

Western Digital Seeks To Intervene In Toshiba's Sale Of Memory Business

Western Digital Seeks To Intervene In Toshiba’s Sale Of Memory Business

Western Digital, through its SanDisk subsidiary, is seeking arbitration to prevent Toshiba from selling off its stake in their flash memory joint venture without the consent of Western Digital. Toshiba has been suffering financially due to crippling losses incurred by its nuclear power division, and to offset those losses Toshiba has been working to sell off its memory business. Toshiba’s memory business is one of the most successful parts of the company and the Toshiba-SanDisk flash memory joint venture is one of the four major manufacturers of NAND flash memory.

When Toshiba announced in March their intentions to raise cash by selling a stake in their memory business, a bidding war emerged. Western Digital, Micron and SK Hynix all sought to expand their share of the NAND flash market, but Toshiba was reluctant to sell to a competitor, hoping to avoid a prolonged anti-trust regulatory approval process. The Japanese government also does not want to see the NAND flash business sold to a Chinese-controlled company. This left private equity firms as the bidders Toshiba was most receptive to, but other technology companies like Broadcom and Foxconn are bidding.

After failing to meet their goal of selling a 20% stake by the end of March, and as revised estimates made it clear that 20% would not cover Toshiba’s nuclear losses, Toshiba’s plans shifted toward a complete spin-off and sale of their Toshiba Memory division. As of February, Toshiba valued this unit at around $18B. In late March it was reported that Broadcom and Silver Lake Partners had jointly bid to buy Toshiba Memory for about that amount, then in early April Foxconn reportedly offered $27B. Broadcom has since increased their bid to $28B. SK Hynix and Bain Capital are reported to be jointly bidding up to $13.5B for a majority stake in Toshiba Memory.

The bids for Toshiba Memory have reached prices that are difficult but not necessarily impossible for Western Digital to match. Western Digital would need to fund an acquisition with significant debt, and other analysts have speculated that it may be better for Western Digital to pursue acquiring a majority stake in Toshiba Memory rather than a complete acquisition.

Western Digital does have leverage in their preexisting relationship with Toshiba as co-owner of their flash memory joint venture. Western Digital is alleging that Toshiba is required to obtain Western Digital’s consent before spinning off or selling Toshiba Memory, and that Toshiba’s actions so far have violated their agreements with Western Digital. Western Digital has initiated arbitration proceedings against Toshiba, seeking to block further action without Western Digital’s consent and to reverse the Toshiba Memory spin-off.

These arbitration proceedings are undoubtedly a major frustration to Toshiba, who badly want to close a deal two months ago. Instead, they are now faced with complicated litigation over the terms of at least three joint venture agreements with SanDisk that are now controlled by Western Digital. So far, Toshiba does not appear to have responded to the arbitration demand and Western Digital claims that Toshiba has indicated they have no intention to obtain consent before selling Toshiba Memory to the highest bidder. It is not clear how long this dispute could take to settle, but there is an initial 30-day window for Toshiba to respond before the conflict escalates. If Toshiba does agree to Western Digital’s arbitration request, estimates range from six months to two years for that process to resolve.

By stalling or blocking competing bids, Western Digital seems to be running out the clock on Toshiba with the goal of forcing them to accept a bid from Western Digital that would not be able to win in an open auction. The longer Western Digital can prevent Toshiba from closing a deal, the more desperate Toshiba will get to raise enough cash to keep the company as a whole afloat. Western Digital has not said whether they will file for an injunction if Toshiba does not agree to participate in arbitration, so there is still a lot of uncertainty about how severe this dispute will get and how long it will last. Analysts at J.P. Morgan are optimistic about Western Digital’s prospects in this dispute and are among several analysts to have upgraded their ratings of Western Digital in recent months.

Despite the dispute over corporate ownership rights, the day to day operations of the Toshiba/Western Digital NAND joint venture have been largely unaffected. Both Toshiba and Western Digital are in the process of bringing products to market using their 64-layer 3D NAND flash, which has a lower cost per bit and much higher density than their 15nm planar NAND. Western Digital predicts that 40% of their wafer output this year will be 3D NAND and 75% of that will be the 64-layer generation. Due to the ongoing industry-wide NAND flash shortage, all of the NAND produced by Toshiba and Western Digital is quite profitable and the companies are being judicious in allocating supply to the most lucrative market segments. There has been some speculation that as the dispute escalates Toshiba might deny Western Digital employees access to their fabs in Yokkaichi, Japan, but Western Digital says Toshiba has not taken any such action and Western Digital employees are continuing to work alongside Toshiba employees in research and development, manufacturing, and testing.

Western Digital Launches HGST Ultrastar SS300 SSDs: 3D NAND for Data Centers

Western Digital Launches HGST Ultrastar SS300 SSDs: 3D NAND for Data Centers

Western Digital has officially introduced its first data center-class SSDs using 3D NAND flash. The new HGST Ultrastar SS300 SSDs are designed for SAS applications with mixed workloads that demand drives with endurance but are not the highest performance possible. The new drives were co-developed with Intel, so they do not have various proprietary SanDisk technologies, such as the Guardian (as some previous-gen Ultrastar SS), but support numerous new features instead.

The Ultrastar SS300 drives use Intel’s 3D NAND memory – which we suspect is their recent 64-layer TLC & MLC – as well as a proprietary controller that was presumably co-designed with Intel. HGST does not disclose many details regarding the chip, but it might be the same controller that powers the recently launched Intel SSD DC P4500 and P4600 drives, albeit featuring a different configuration and a different firmware. From the feature set, the Ultrastar SS300 controller supports 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. In addition, the Ultrastar SS300 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 will offer various Ultrastar SS300 models with features like TCG encryption, TCG+FIPS, and instant secure erase to comply with different security requirements.

The HGST Ultrastar SS300 SSDs are aimed at various market segments, including financial transactions, e-commerce, virtualization, database analytics, etc. that generate read-intensive and mixed-use workloads and thus need both performance and reliability. The new SSDs come in a 2.5”/15 mm form-factor with SAS 12 Gb/s interface and are drop-in compatible with existing servers. Meanwhile, when compared to direct predecessors, the Ultrastar SS200, the new SS300 offer similar capacities — from 400 GB to 7.68 TB, but the new drives excel the ancestors in most possible metrics (endurance, performance, power, etc.).

When it comes to performance, the HGST Ultrastar SS300 features sequential read speeds of up to 2100 MB/s (+20% vs. the SS200) as well as sequential write speeds of up to 2050 MB/s (3D MLC, +105%) or 1250 MB/s (3D TLC, +25%). Random read performance of the Ultrastar SS300 is up to 400K (+60%), while random write performance is rated at 170-200K for 3D MLC-based performance/endurance-optimized models as well as 115K-130K for capacity-optimized 3D TLC-powered drives. Interestingly, in addition to 9 W and 11 W power envelopes supported by the predecessor, the SS300 also supports a 14 W mode that unlocks “additional performance capabilities” (i.e., IOPS) as well as an ultra-low power setting.

HGST Ultrastar SS300 Series Specifications
  3D MLC NAND-Based 3D TLC NAND-Based
Capacities 400 GB
800 GB
1,600 GB
3,200 GB
480 GB
960 GB
1,920 GB
3,840 GB
7,680 GB
1,920 GB
3,840 GB
7,680 GB
Form Factor 2.5″/15mm
Interface SAS 6/12 Gb/s, dual port for 12 Gb/s
Controller Proprietary
NAND 3D MLC NAND 64-layer 512 Gb
3D TLC NAND
Sequential Read 2100 MB/s
Sequential Write 2050 MB/s 1250 MB/s 1200 MB/s
Random Read (4 KB) IOPS 400,000
Random Write (4 KB) IOPS 200,000 170,000 120,000 80,000
Mixed Random R/W (70:30 R:W, 4KB)
Max IOPS
285,000 265,000 130,000 115,000
Write Latency 512 B 85 ms unknown
Power Idle 3.7 W (<3.2 TB) – 4.7 W (>3.2 TB)
Operating 9 W, 11 W, 14 W (configurable)
Endurance DPWD 10 3 ~1 ~0.5
Max. PB 400GB: 7PB
800GB: 15PB
1.6TB: 29PB
3.2TB: 59PB
400GB: 2PB
800GB: 4.5PB
1.6TB: 8.5PB
3.2TB: 17.5PB
480GB: 0.9PB
960GB: 1.75PB
1.92TB: 3.5PB
3.84TB: 7PB
7.68TB: 14PB
1.92TB: 1.8PB
3.84TB: 3.5PB
7.68TB: 7PB
Encryption AES-256 (?)
Power Loss Protection Yes
MTBF 2.5 million hours
Warranty Five years or max PB written (whichever occurs first)
Models HUSMM3232ASS20x
HUSMM3216ASS20x
HUSMM3280ASS20x
HUSMM3240ASS20x
HUSMR3232ASS20x
HUSMR3216ASS20x
HUSMR3280ASS20x
HUSMR3240ASS20x
HUSTR7676ASS20x
HUSTR7638ASS20x
HUSTR7619ASS20x
HUSTR7696ASS20x
HUSTR7648ASS20x
HUSTV1576ASS20x
HUSTV1538ASS20x
HUSTV1519ASS20x
Legend for Model Numbers H = HGST
U = Ultrastar
S = Standard
MM = NAND type/endurance
(MM=MLC/mainstream endurance, MR=MLC/read-intensive,
TR=TLC/read intensive TV=TLC very read intensive)
32 = Full capacity (3.2TB)
32 = Capacity of this model
(76=7.6TB, 38=3.84TB 32=3.2TB, 19=1.92TB, 16=1.2TB,
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

As for endurance, various versions of the HGST Ultrastar SS300 support 0.5, 1, 3 or 10 writes per day, thus extending addressable markets of the Ultrastar SS-series to applications that require extra endurance at 10 DPWD. All the Ultrastar SS300 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 has already started to ship its SS300 SSDs to select OEM partners, including Oracle. The company does not announce pricing of the drives since they depend on configurations, volume purchasing and other factors.

Related Reading:

Western Digital Launches HGST Ultrastar SS300 SSDs: 3D NAND for Data Centers

Western Digital Launches HGST Ultrastar SS300 SSDs: 3D NAND for Data Centers

Western Digital has officially introduced its first data center-class SSDs using 3D NAND flash. The new HGST Ultrastar SS300 SSDs are designed for SAS applications with mixed workloads that demand drives with endurance but are not the highest performance possible. The new drives were co-developed with Intel, so they do not have various proprietary SanDisk technologies, such as the Guardian (as some previous-gen Ultrastar SS), but support numerous new features instead.

The Ultrastar SS300 drives use Intel’s 3D NAND memory – which we suspect is their recent 64-layer TLC & MLC – as well as a proprietary controller that was presumably co-designed with Intel. HGST does not disclose many details regarding the chip, but it might be the same controller that powers the recently launched Intel SSD DC P4500 and P4600 drives, albeit featuring a different configuration and a different firmware. From the feature set, the Ultrastar SS300 controller supports 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. In addition, the Ultrastar SS300 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 will offer various Ultrastar SS300 models with features like TCG encryption, TCG+FIPS, and instant secure erase to comply with different security requirements.

The HGST Ultrastar SS300 SSDs are aimed at various market segments, including financial transactions, e-commerce, virtualization, database analytics, etc. that generate read-intensive and mixed-use workloads and thus need both performance and reliability. The new SSDs come in a 2.5”/15 mm form-factor with SAS 12 Gb/s interface and are drop-in compatible with existing servers. Meanwhile, when compared to direct predecessors, the Ultrastar SS200, the new SS300 offer similar capacities — from 400 GB to 7.68 TB, but the new drives excel the ancestors in most possible metrics (endurance, performance, power, etc.).

When it comes to performance, the HGST Ultrastar SS300 features sequential read speeds of up to 2100 MB/s (+20% vs. the SS200) as well as sequential write speeds of up to 2050 MB/s (3D MLC, +105%) or 1250 MB/s (3D TLC, +25%). Random read performance of the Ultrastar SS300 is up to 400K (+60%), while random write performance is rated at 170-200K for 3D MLC-based performance/endurance-optimized models as well as 115K-130K for capacity-optimized 3D TLC-powered drives. Interestingly, in addition to 9 W and 11 W power envelopes supported by the predecessor, the SS300 also supports a 14 W mode that unlocks “additional performance capabilities” (i.e., IOPS) as well as an ultra-low power setting.

HGST Ultrastar SS300 Series Specifications
  3D MLC NAND-Based 3D TLC NAND-Based
Capacities 400 GB
800 GB
1,600 GB
3,200 GB
480 GB
960 GB
1,920 GB
3,840 GB
7,680 GB
1,920 GB
3,840 GB
7,680 GB
Form Factor 2.5″/15mm
Interface SAS 6/12 Gb/s, dual port for 12 Gb/s
Controller Proprietary
NAND 3D MLC NAND 64-layer 512 Gb
3D TLC NAND
Sequential Read 2100 MB/s
Sequential Write 2050 MB/s 1250 MB/s 1200 MB/s
Random Read (4 KB) IOPS 400,000
Random Write (4 KB) IOPS 200,000 170,000 120,000 80,000
Mixed Random R/W (70:30 R:W, 4KB)
Max IOPS
285,000 265,000 130,000 115,000
Write Latency 512 B 85 ms unknown
Power Idle 3.7 W (<3.2 TB) – 4.7 W (>3.2 TB)
Operating 9 W, 11 W, 14 W (configurable)
Endurance DPWD 10 3 ~1 ~0.5
Max. PB 400GB: 7PB
800GB: 15PB
1.6TB: 29PB
3.2TB: 59PB
400GB: 2PB
800GB: 4.5PB
1.6TB: 8.5PB
3.2TB: 17.5PB
480GB: 0.9PB
960GB: 1.75PB
1.92TB: 3.5PB
3.84TB: 7PB
7.68TB: 14PB
1.92TB: 1.8PB
3.84TB: 3.5PB
7.68TB: 7PB
Encryption AES-256 (?)
Power Loss Protection Yes
MTBF 2.5 million hours
Warranty Five years or max PB written (whichever occurs first)
Models HUSMM3232ASS20x
HUSMM3216ASS20x
HUSMM3280ASS20x
HUSMM3240ASS20x
HUSMR3232ASS20x
HUSMR3216ASS20x
HUSMR3280ASS20x
HUSMR3240ASS20x
HUSTR7676ASS20x
HUSTR7638ASS20x
HUSTR7619ASS20x
HUSTR7696ASS20x
HUSTR7648ASS20x
HUSTV1576ASS20x
HUSTV1538ASS20x
HUSTV1519ASS20x
Legend for Model Numbers H = HGST
U = Ultrastar
S = Standard
MM = NAND type/endurance
(MM=MLC/mainstream endurance, MR=MLC/read-intensive,
TR=TLC/read intensive TV=TLC very read intensive)
32 = Full capacity (3.2TB)
32 = Capacity of this model
(76=7.6TB, 38=3.84TB 32=3.2TB, 19=1.92TB, 16=1.2TB,
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

As for endurance, various versions of the HGST Ultrastar SS300 support 0.5, 1, 3 or 10 writes per day, thus extending addressable markets of the Ultrastar SS-series to applications that require extra endurance at 10 DPWD. All the Ultrastar SS300 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 has already started to ship its SS300 SSDs to select OEM partners, including Oracle. The company does not announce pricing of the drives since they depend on configurations, volume purchasing and other factors.

Related Reading: