Value, Mainstream And Performance Ssds - Compaq BL10e - HP ProLiant - 512 MB RAM Technology Overview

sustain a loss of power without requiring the lengthy metadata rebuild process required for SSDs that
do not have this feature.

Value, mainstream and performance SSDs

As with spinning media, HP will introduce SSDs to meet the requirements of different application
environments. All HP SSDs are considered Enterprise class devices since they deliver I/O
performance, particularly read performance that is as good as or better than Enterprise class disk
drives. SSDs are differentiated primarily by the read/write workload levels that they are able to
support and their endurance, or expected service life. The current 2
in late 2009 are considered Enterprise mainstream storage devices. They are intended for use in
workload constrained environments and are designed to have a 3 year service life. The first Enterprise
performance SSDs are expected to be available sometime in 2010. These devices will be designed
for use in unconstrained workload environments. Enterprise value SSDs will be designed to provide
relatively large storage capacities at lower costs, but will not have the endurance of the mainstream
or performance SSDs. Table 4 compares the endurance and reliability characteristics of the different
types of SSDs that HP plans to offer.
Table 4. Comparison of HP solid state drives and classes
Value SATA SSDs
(2010/2011)
Class Enterprise value
General SFF and LFF Hot Plug
description
Capacities 400 – 500 GB
NAND MLC
technology
Workload Constrained write
workloads
< 30% writes, <70%
reads
Reliability 1year service life @
Endurance constrained write
workloads
Data Retention < 1 year
Usage Boot devices.
environment Applications that are high
in reads but few or no
writes or data is transient
Interface SATA
3 Gb/s
Power 1 Watt
Operating 0 – 60° C
Environment
All SSDs are capable of operating in environments that are unsuitable for traditional disk drives:
 Higher temperature environments (up to 60° C)
nd
2 nd generation SATA SSDs
(2009)
Enterprise mainstream
SFF and LFF Hot Plug
ML, DL, BL platforms
60 GB and 120 GB
SLC
(MLC planned)
Constrained write
workloads
< 30% writes, <70%
reads
3 year service life @
constrained write
workloads
< 1 year
- High IO/s applications
SATA
3 Gb/s
2 Watts
0 – 60° C
generation HP SSDs introduced
1 st generation 6 GB SAS SSDs
(2010)
Enterprise performance
SFF and LFF Hot Plug
ML, DL, BL platforms
200 GB +
SLC
SLC
- Unconstrained workloads
- 100% duty cycle
3-5 year service life.
Unconstrained workloads
< 1 year
- Mission critical
- High IO/s applications
SAS
6 Gb/s
Up to 9 Watts
0 – 60° C
11