What is ARM/OR and how does it work?
Adaptive read management/optimized read (ARM/OR) provides voltage threshold compensation during reads. The device’s read voltage is adjusted in the background or after uncorrectable ECC. Micron’s P400e, P400m, and P410m SSDs all have ARM/OR capability.
What is RAIN and why is RAIN important?
Micron’s RAIN management is a unique technology designed to manage device reliability. Parity page (also called a stripe) is structured in an arrangement of 15 pages of user data + 1 parity page. In the event a page of data cannot be read, RAIN allows that page to be completely reconstructed using the other 15 user data pages + 1 parity page in an exclusive OR function. (The P320h SSD is structured in a 7+1 arrangement.)
RAIN protects the NAND device from data loss at any age. Unlike ECC technology, RAIN recovers lost data beyond page, block, and die-level failures. The benefits of RAIN include:
- No system-level performance degradation
- Automatic background rebuild when a failure is detected
- Continued operation after a channel failure
- Parity-level optimizations
- Data management schemes
- Reduction in the available NAND space by 12.5% (P410m)
RAIN extends drive life and provides data backup and management. RAIN makes NAND data loss extraordinarily unlikely, regardless of the age of the NAND device.
What is XPERT?
eXtended Performance and Enhanced Reliability Technology (XPERT) is a suite of Micron-designed storage architecture enhancements that extend SSD performance and enhance reliability—both in terms of drive lifespan and data integrity.
Micron aligns storage media (NAND) design, SSD firmware development, and hardware integration to create a comprehensive architecture that optimizes enterprise-class SSDs to meet the unrelenting demands of 24/7/365 data center workloads.
For more information, see our XPERT technical brief.
Do you overprovision? Why is that important?
Yes. The P410m overprovisions space to provide enterprise-level endurance, latency, and reliability. Overprovisioning provides additional working space in the drive that enables the controller to execute background tasks while foreground tasks (host I/O) run with consistent latency and performance levels.
How is P410m eMLC different from standard MLC?
P410m eMLC is specifically designed for enterprise SSD applications. The NAND device is only screened and tailored for SSDs and is not available or used in any other product.
What are the endurance specifications for the P410m?
The drive lifetime varies by density, offering up to 7PB total bytes written (for the 400GB drive)—or 10 fills per day for 5 years.
How is the P410m different from the P400m?
The P410m employs a SAS interface and has higher performance specifications; but like the P400m, it uses custom NAND and XPERT architecture to achieve high write endurance and data reliability.
What value does the P410m provide?
The P410m strikes a balance between price and performance not often seen in the SAS enterprise market. Built from the ground up using Micron’s custom 25nm MLC NAND and XPERT architecture, the P410m delivers world-class performance, reliability, and endurance.
What is the difference between data path protection and power-loss protection?
Data path protection provides an additional layer of protection against bit flips that is not offered by error code correction (ECC). Power-loss protection maintains voltage with capacitors so that writes can complete successfully and data is protected even if power is lost.
What types of data protection does the P410m offer?
These drives offer data path protection like other Micron enterprise drives. Additionally, they offer a redundant array of independent NAND (RAIN) architecture that provides device-integrated algorithms that are RAID 5 across the Flash channels.
Does the P410m have power-loss protection?
Yes, the drives’ onboard capacitors continually store power for emergency use. In the event of a power loss, the capacitors provide enough power for the drives to commit all pending WRITE commands.
What host bus adapters (HBAs) are compatible with this drive?