IBM 49Y6149 Datasheet download pdf (Page 3)

IBM SAS 2.5-inch MLC Enterprise SSDs 3

Features

Industry standard 2.5-inch form factor supports 2.5-inch drive bays on selected System x, IBM

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iDataPlex®, IBM BladeCenter® and IBM Flex System™ servers

Utilizes industry leading 24 nm MLC NAND technology

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Cost-effective MLC SAS drive with high read and write performance to fulfill client needs in the

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enterprise space

High endurance, with up to 14.6 PB of total bytes written (TBW) to withstand applications with

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intensive read/write workloads

Energy saving, with as little as 7 watt power consumption per drive

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Absence of moving parts to reduce potential failure points in the server

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S.M.A.R.T. support

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Advanced Encrypting Standard (AES) 256-bit encryption

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FlashGuard technology extends the native endurance of commercial-grade MLC flash

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Aggregated Flash Management

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Advanced Signal Processing

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Enhanced Error Correction

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DataGuard technology protects against data corruption and loss

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Full data path protection

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Flexible Redundant Array of Memory Elements (F.R.A.M.E.) data recovery algorithm

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EverGuard technology protects data in the event of unplanned power outages

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Static wear leveling evenly distributes data across the drive

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Bad block management replaces failed blocks with new ones from the spare pool

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Thermal throttling to extend the life of the drive

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Data retention management to ensure availability and integrity of stored data

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Minimal write amplification for efficient flash utilization and extended lifetime

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The key difference between Enterprise SSDs and Enterprise Value SSDs is their endurance (or life

expectancy). SSDs have a huge but finite number of program/erase (P/E) cycles, which affects how long

they can perform write operations and thus their life expectancy. Enterprise SSDs have significantly better

endurance but higher cost/IOPS ratio compared to Enterprise Value SSDs. SSD write endurance is

typically measured by the number of program/erase cycles that the drive can incur over its lifetime, listed

as TBW in the device specification.

For example, with IBM 800GB SAS 2.5-inch MLC Enterprise SSD, the entire 800 GB can be fully

re-written up to ten times per day (up to 8 TB writes per day) to meet the five-year lifetime expectation of

the drive, while the Enterprise Value SSD can sustain up to only 40 GB writes per day (200 times less) to

provide the same five-year lifetime.

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IBM 49Y6149 Datasheet Page 3

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