HP SureStore 7400 ISS Technology Focus, Number 14

HP SureStore 7400 Manual

Get HP SureStore 7400 PDF manuals and user guides View all HP SureStore 7400 manuals
Add to My Manuals
Save this manual to your list of manuals

HP SureStore 7400 manual content summary:

  • HP SureStore 7400 | ISS Technology Focus, Number 14 - Page 1
    with NAND architecture, read the technology brief "Solid state storage technology for ProLiant servers" at http://h20000.www2.hp.com/bc/docs/support/SupportManual/c01580706/c01580706.pdf. NAND flash memory Solid-state devices based on NAND technology have a finite amount of writes and can be
  • HP SureStore 7400 | ISS Technology Focus, Number 14 - Page 2
    time. This allows HP SSDs to avoid the lengthy metadata rebuild process required for SSDs without power-loss protection. SmartSSD Wear Gauge support All HP SSDs incorporate sophisticated features to monitor SSD usage and wear. These monitoring features enable tools that present information to you
  • HP SureStore 7400 | ISS Technology Focus, Number 14 - Page 3
    Table 1-1. The application recommendations in the table are based on the differences in the performance, cost, and endurance of the HP solid-state solutions. Follow these recommendations to ensure that you choose the correct product. Table 1-1: Enterprise solid-state storage device classes
  • HP SureStore 7400 | ISS Technology Focus, Number 14 - Page 4
    supplied by the utility. This is much safer for personnel servicing equipment because arc flash is not a concern. DC power distribution support for Hyper-Threading (HT) Technology, also known as simultaneous multi-threading. HT, which is enabled by default, allows the OS to schedule two instruction
  • HP SureStore 7400 | ISS Technology Focus, Number 14 - Page 5
    contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable
  • 1
  • 2
  • 3
  • 4
  • 5
ISS Technology Focus
Number 14
In this issue:
»
Choose the right solid-
state storage solution
»
Efficiency of DC vs. AC
power supplies
»
Tip: Check Hyper-
Threading status
remotely using
Microsoft® Windows®
PowerShell
»
Recent publications
ISS TechComm iTunes
New posts are now
available on Apple
iTunes, either check your
iTunes page or go to
ours:
iTunes page
.
Follow us:
Like us:
Choose the right solid-state storage solution
This article describes the features and applications of HP enterprise class solid-state
drives (SSDs) and IO accelerators. A subsequent article will detail the differences in these
solid-state storage devices based on performance, latency, lifetime writes, and expected
life at 100% writes. HP solid-state storage devices are based on NAND flash memory,
which is the predominant solid-state storage technology. Before describing the features
and applications of these devices, we must explain a few important characteristics of
NAND flash memory. If you are unfamiliar with NAND architecture, read the technology
brief “Solid state storage technology for ProLiant servers”
at
.
NAND flash memory
Solid-state devices based on NAND technology have a finite amount of writes and can be
„worn out‟ ove
r time. The life expectancy (endurance) of a SSD or IO accelerator is
dependent on the NAND technology, write workloads, and the capacity of the device.
There are two primary types of NAND flash technology, each with different endurance,
performance, densities, and costs.
•
Single-level cell (SLC) technology works by storing one of two different charge states in
each cell, representing a single bit of information.
•
Multi-level cell (MLC) technology stores two or more bits in one cell. This allows each cell
increase storage density by 100% or more. Two-bit MLC stores one of four different charg
states in a cell. Three-bit MLC stores one of eight different charge states in a cell.
As shown in Figure 1-1, SLC NAND has higher endurance, retention, and write
performance than MLC NAND. MLC technology is the dominant NAND technology used in
consumer products where cost is a primary factor. SLC-based SSDs provide the highest
performance and endurance for enterprise server storage. MLC-based SSDs provide a
lower cost per GB solution but have lower write performance and write endurance. MLC-
based SSDs are a good option for read-intensive application environments with limited
write requirements.