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Computex: Innodisk Tackles SSD Data Retention Challenges in High Temperature

iRetention technology with onboard sensor will monitor temperatures, which, along with P/E cycle number, are used to calculate how often to refresh data.

Innodisk Corporation announced iRetention is strengthening data retention through firmware and hardware optimization.

Flash memory is a non-volatile storage medium. This means that data remains on the SSD without power. There are, however, certain factors that can lead to data loss and data degradation.

Data retention: Temperature and P/E cycles
High temperature and frequent program/erase (P/E) cycles can both impact data retention. Every cell inside flash traps a negative charge that represents a binary value (e.g. 01, 10 etc.). These cells are generally good at holding on to this charge, but every now and then some of the charge will leak out. An ECC is normally good at picking this up and fixing the problem.

High temperatures will, however, speed up the rate of leakage. Testing shows that the data retention of standard MLC flash decreases 168-fol when moving from 40°C to 85°C. This means data that would normally last two years, will experience issues in five days. The problem is further exacerbated as the number of P/E cycles increases, meaning that SSDs in heavy-writing environments are particularly at risk.

iRetention
Thhis technology tackles this problem through smart firmware and hardware innovations. An onboard sensor will constantly monitor temperatures, which, along with the P/E cycle number, are used to calculate how often to refresh the data. This is all handled by the SSD itself and will self-adjust to changes in the environment.

iRetention is for devices that see extreme temperatures and thermal variation. This makes it suitable for application such as in-vehicle, automation, food processing, aerospace and defense.

The firm will showcase iRetention at next Computex, Nangang Exhibition Center, Taipei, Taiwan.

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