● Covered by 1 source · 1 reportMedium impact1 neutral
DapuStor J5060 SSD Offers Configurable pSLC Region for Faster Random Writes
Key points
- DapuStor J5060 SSD uses firmware to configure QLC cells as pSLC.
- Trades 6-20% QLC capacity for a fixed pSLC region.
- Improves random write performance by more than seven times.
- Targets database journals, WALs, and metadata caches.
Configurable Dual-Mode Flash
DapuStor has unveiled a new dual-mode configuration for its J5060 enterprise SSD, which combines SLC and QLC flash characteristics on a single drive. The drive's firmware enables selected QLC cells to operate in a faster pseudo-SLC (pSLC) mode, exchanging storage capacity for increased speed.
Capacity-Performance Trade-off
This configuration allows operators to define a fixed pSLC region, unlike dynamic caches found in consumer QLC drives. For example, a 30.72TB model can allocate 800GB of pSLC by using approximately 4TB of QLC. This trade-off, ranging from 6% to 20% of the QLC capacity, is achieved through software-defined media configuration without requiring dedicated SLC NAND.
The J5060 is available in capacities from 15.36TB to 122.88TB, utilizing a U.2 form factor for PCIe 4.0 x4. Its endurance is rated at 0.5 Drive Writes Per Day (DWPD) over five years.
Performance Gains and Target Workloads
DapuStor states that this pSLC configuration improves random write performance, a weakness of QLC, by more than seven times. Average 4K random-write latency is reported to be below 8 microseconds. The pSLC region also offers over 25 times the program/erase cycles compared to the QLC region.
This is achieved through firmware changes including die-level isolation, optimized SLC reserve allocation, and region-aware I/O scheduling. The high-performance region is designed for workloads that benefit from faster writes, such as database journals, write-ahead logs (WALs), and metadata caches.
Industry Context
The NVMe specification has supported this type of arrangement since 2019, with the goal of enabling customers to configure a single SKU for their specific use cases. This approach aims to reduce the need for specialized SLC drives in certain applications.
✨ This summary was generated by AI from the outlets' reporting listed below. It is not independently verified and may contain errors — check the original sources. How BrevFeed works →
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Reporting from
DapuStor introduced a new firmware configuration for its J5060 enterprise SSD, allowing users to allocate a fixed portion of QLC flash as a faster pSLC region. This trade-off of 6% to 20% of QLC capacity significantly improves random write performance by over seven times, targeting workloads like database journals and write-ahead logs.