Справочник Пользователя для IBM 400GB SAS 2.5" MLC SS 49Y6149
Модели
49Y6149
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
iDataPlex®, IBM BladeCenter® and IBM Flex System™ servers
Utilizes industry leading 24 nm MLC NAND technology
Cost-effective MLC SAS drive with high read and write performance to fulfill client needs in the
enterprise space
High endurance, with up to 14.6 PB of total bytes written (TBW) to withstand applications with
intensive read/write workloads
Energy saving, with as little as 7 watt power consumption per drive
Absence of moving parts to reduce potential failure points in the server
S.M.A.R.T. support
Advanced Encrypting Standard (AES) 256-bit encryption
FlashGuard technology extends the native endurance of commercial-grade MLC flash
Aggregated Flash Management
Advanced Signal Processing
Enhanced Error Correction
DataGuard technology protects against data corruption and loss
Full data path protection
Flexible Redundant Array of Memory Elements (F.R.A.M.E.) data recovery algorithm
EverGuard technology protects data in the event of unplanned power outages
Static wear leveling evenly distributes data across the drive
Bad block management replaces failed blocks with new ones from the spare pool
Thermal throttling to extend the life of the drive
Data retention management to ensure availability and integrity of stored data
Minimal write amplification for efficient flash utilization and extended lifetime
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.
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.
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.