The SanDisk uSSDTM 5000 Solid State Drive (uSSD) takes the benefits of flash
storage to new markets with low-capacity storage requirements, most notably
the low-cost PC (LCPC). Rugged and reliable, it is a fraction of the size and
cost of a hard disk drive (HDD) in the 1 to 8 GB range. SanDisk adds high
performance to the uSSD offering, with an advanced controller that
exemplifies the company’s years of USB expertise.
1.1.1 Applications
The SanDisk uSSD offers a no-compromise flash-based storage solution for:
• LCPCs that need rugged reliability and require up to 4 GB storage. The
uSSD can meet these requirements more cost-effectively than an HDD.
• Desktops that support Microsoft® Vista and can benefit from enabling
ReadyBoost®.
• Point of sale (POS) stations, where the uSSD replaces the HDD.
• Blade servers, where the uSSD is ideal to store critical backup files and
provide boot functionality.
1.1.2 Rugged and Reliable
Unlike the HDD, the SanDisk uSSD has no moving parts. It keeps working in
challenging environments such as classrooms, kiosks and in space-restricted
server racks. The patented flash management technology brings top data
integrity to the uSSD, even during power losses. Dynamic bad block
management, dynamic and static wear-leveling, and robust error detection
and correction code (EDC/ECC) ensure data reliability.
1.1.3 High Performance
The uSSD achieves a sustained read speed as high as 31.6 MB/sec and a
sustained write speed of up to 24.8 MB/sec with single-level cell (SLC)
technology.
1.1.4 Cost Effective
There is no need to pay for more capacity than you require. The uSSD lets you
purchase just the right amount of storage, packed inside a memory device
that’s 4 times smaller than a 1.8” HDD. It offers you the cho ice of single-level
cell (SLC) flash technology or the more cost-effective multi-level cell (MLC)
technology.
The SanDisk uSSD 5000 provides the following system features:
• Non-volatile storage (no battery required)
• USB 2.0 interface, certified by the USB organization
• Complies with Microsoft Vista ReadyBoost® requirements
• Up to 8 GB of mass storage based on SanDisk’s reliable flash technology
• SLC flash and MLC flash-based configurations
• Fixed configuration (not removable)
• Low power consumption
• High performance:
Sustained Read and write speed of up to 31.6 MB/sec for reading,
24.8 MB/sec for writing (SLC configuration)
• Rugged
• Lightweight
• Silent
• Standard and low profile
• Advanced error detection and error correction algorithms
• Advanced wear-leveling algorithms
• Guaranteed data integrity even after power loss
• MTTF* > 4,000,000 hours
• Multiple OS support
• Warranty: 3 years
* Based on internal testing. The MTTF calculation does not take into account the disk endurance
limitation. For the disk endurance, please refer to the endurance section on page 9.
This document describes the key features and specifications of the uSSD 5000,
as well as the information required to interface this product to a host system.
1.3.1 Technology Independence
To write or read a sector (or multiple sectors), the host computer software
simply issues a Read or Write command to the module.
This command contains the address and the number of sectors to write/read.
The host software then waits for the command to be completed.
The host software does not participate in the details of how the flash memory
is erased, programmed or read. This is extremely important as flash devices
are expected to increase in complexity in the future. Because the uSSD 5000
uses an intelligent on-board controller, the host system software will not need
to be changed as new flash memory evolves. As such, systems that support
uSSD 5000 now will be able to access future SanDisk Modules built with ne w
flash technology without any need to update or change the host software.
1.3.2 Defect and Error Management
The uSSD 5000 contains a sophisticated defect and error management
system.
If necessary, the Module will rewrite data from a defective sector to a good
sector. This is completely transparent to the host and does not consume any
user data space.
The uSSD 5000 soft error rate specification is much better than the magnetic
disk drive specification.
In the extremely rare case that a read error does occur, the uSSD 5000 has
innovative algorithms to recover the data by using hardware on-the-fly Error
Detection Code/Error Correction Code (EDC/ECC), based on a BCH algorithm.
These defect and error management systems, coupled with solid state
construction, give the SanDisk uSSD 5000 unparalleled reliability.
1.3.3 Wear-leveling
Wear-leveling is an inherent part of the erase-pooling functionality of the
SanDisk uSSD 5000, using NAND memory.
Advanced features of dynamic and static wear-leveling and automatic block
management are used to ensure high data reliability and maximize flash life
expectancy.
1.3.4 Bad Block Management
Bad blocks are occasionally created during the lifecycle of a flash component,
in a phenomenon called dynamic bad block accumulation. These bad blocks
must be dynamically marked and replaced to prevent read/write failures.
When a bad block is detected, the embedded bad block mapping algorithm
maps out the block, which is then no longer used for storage.
Data integrity after power loss
Bad blocks
Wear-leveling
Error detection / error correction based on
BCH algorithm
Data is guaranteed after power loss
Transparent bad block management
Dynamic and Static Wear-leveling
2.5.1 MTTF
The reliability figure of merit most often used for electronic equipment is Mean
Time To Failure (MTTF). SanDisk estimates MTTF using a prediction
methodology based on reliability data for the individual components in
SanDisk products.
Component data comes from several sources: device life te sts, failure analysi s
of earlier equipment, device physics, and field returns.
SanDisk uses following methods to predict reliability:
• Telcordia Special Report SR-332, Reliability Prediction Procedure for
Electronic Equipment (RPP).
• British Telecom Industry HRD5, Handbook of Reliability Data for
Electronic Components used in Telecommunication System.
Table 6 summarizes the MTTF prediction results for various uSSD
configurations. The analysis was performed using a RAM Commander™ failure
rate prediction.
•Failure Rate: The total number of failures within an item population,
divided by the total number of life units expended by that population,
during a particular measurement interval under stated condition.
•Mean Time To Failures (MTTF): A basic measure of reliability for
repairable items: The mean number of life units during which all parts of
the item perform within their specified limits, during a particular
measurement interval under stated conditions.
An adapter is available to assist customers in evaluating the uSSD 5000. The
adapter enables inserting the uSSD 5000 in an external desktop or laptop USB
port.
The uSSD 5000 is supported under the operating syste ms listed in Table 13.
In the standard boot and storage modes, the uSSD 5000 is recognized as a
fixed disk in the system. The system can also boot from the uSSD 5000,
eliminating the need for additional components.
Software packages for the supported operating systems can be downloaded
from the SanDisk website, along with the relevant documentation.
Table 13: OS Support
Operating System Version Support
Windows XP Pro Service Pack 2 SanDisk driver
Windows XP Embedded FP 2008 Native in the OS
Windows Vista (Storage and ReadyBoost support) Native in the OS
Windows Embedded for Point of Service (WEPOS) N/A SanDisk driver
Windows Server 2003 SanDisk driver
Windows CE 5.0 and 6.0 Native in the OS
Linux All versions Native in the OS
DOS Native in the OS
2.11 Regulatory Compliance
The uSSD 5000 complies with the following:
• USB Organization certification
• RoHS (6 Materials)
• Chinese RoHS
• FCC Class B for Information Technology
• CE EN 55022/55024
• Flammability ratings for major components can be found under System
1 megabyte (MB) = 1 million bytes; 1 gigabyte (GB) = 1 billion bytes. Some of the listed
capacity is used for formatting and other functions, and thus is not available for data storage.
SanDisk warrants its products to be free of any defects in materials or workmanship
that would prevent them from functioning properly for one year from the date of
purchase. This express warranty is extended by SanDisk Corporation.
II. General Provisions
This warranty sets forth the full extent of SanDisk's responsibilities regarding the
SanDisk Module. In satisfaction of its obligations hereunder, SanDisk, at its sole
option, will repair, replace or refund the purchase price of the product.
NOTWITHSTANDING ANYTHING ELSE IN THIS LIMITED WARRANTY OR OTHERWISE,
THE EXPRESS WARRANTIES AND OBLIGATIONS OF SELLER AS SET FORTH IN THIS
LIMITED WARRANTY, ARE IN LIEU OF, AND BUYER EXPRESSLY WAIVES ALL OTHER
OBLIGATIONS, GUARANTIES AND WARRANTIES OF ANY KIND, WHETHER EXPRESS
OR IMPLIED, INCLUDING WITHOUT LIMITATION, ANY IMPLIED WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR INFRINGEMENT,
TOGETHER WITH ANY LIABILITY OF SELLER UNDER ANY CONTRACT, NEGLIGENCE,
STRICT LIABILITY OR OTHER LEGAL OR EQUITABLE THEORY FOR LOSS OF USE,
REVENUE, OR PROFIT OR OTHER INCIDENTAL OR CONSEQUENTIAL DAMAGES,
INCLUDING WITHOUT LIMITATION PHYSICAL INJURY OR DEATH, PROPERTY DAMAGE,
LOST DATA, OR COSTS OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR
SERVICES.
IN NO EVENT SHALL THE SELLER BE LIABLE FOR DAMAGES IN EXCESS OF THE
PURCHASE PRICE OF THE PRODUCT, ARISING OUT OF THE USE OR INABILITY TO USE
SUCH PRODUCT, TO THE FULL EXTENT SUCH MAY BE DISCLAIMED BY LAW.
SanDisk's products are not warranted to operate without failure. Accordingly, in any
use of products in life support systems or other applications where failure could cause
injury or loss of life, the products should only be incorporated in systems designed
with appropriate redundancy, fault tolerant or back-up features.
III. What this Warranty Covers
For products found to be defective within five years of purchase, SanDisk will have the
option of repairing or replacing the defective product, if the following conditions are
met:
A. A warranty registration Module for each defective product was submitted and is on
file at SanDisk. If not, a warranty registration Module must accompany each
returned defective product.
This Module is included in each product's original retail package.
B. The defective product is returned to SanDisk for failure analysis as soon as
possible after the failure occurs.
C. An incident Module filled out by the user, explaining the conditions of usage and
the nature of the failure, accompanies each returned defective product.
D. No evidence is found of abuse or operation of products not in accordance with the
published specifications, or of exceeding storage or maximum ratings or operating
conditions.
All failing products returned to SanDisk under the provisions of this limited warranty
shall be tested to the product's functional and performance specif ications.
Upon confirmation of failure, each product will be analyzed, by whatever means
necessary, to determine the root cause of failure. If the root cause of failure is found
to be not covered by the above provisions, then the product will be returned to the
customer with a report indicating why the failure was not covered under the warranty.
This warranty does not cover defects, malfunctions, performance failures or damages
to the unit resulting from use in other than its normal and cu stomary mann er, misuse,
accident or neglect; or improper alterations or repairs.
SanDisk reserves the right to repair or replace, at its discretion, any product returned
by its customers, even if such product is not covered under warranty, but is under no
obligation to do so.
SanDisk may, at its discretion, ship repaired or rebuilt products ident ified in the same
way as new products, provided such Modules meet or exceed the same published
specifications as new products. Concurrently, SanDisk also reserves the right to
market any products, whether new, repaired, or rebuilt, under different specifications
and product designations if such products do not meet the original product's
specifications.
IV. Receiving Warranty Service
According to SanDisk's warranty procedure, defective product should be returned only
with prior authorization from SanDisk Corporation. Please contact SanDisk's OEM
Support Department at 866-436-6073 with the following information: product model
number and description, serial numbers, nature of defect, conditions of use, proof of
purchase and purchase date. If approved, SanDisk will issue a Return Material
Authorization or Product Repair Authorization number and provide a shipping address
where the defective product can be returned.
V. State Law Rights
SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR
CONSEQUENTIAL DAMAGES, OR LIMITATION ON HOW LONG AN IMPLIED WARRANTY
LASTS, SO THE ABOVE LIMITATIONS OR EXCLUSIONS MAY NOT APPLY TO YOU.
This warranty gives you specific rights and you may also have other rights that vary
from state to state.
SanDisk Corporation general policy does not recommend the use of its products in life
support applications wherein a failure or malfunction of the product may directly
threaten life or injury.
Accordingly, in any use of products in life support systems or other applications where
failure could cause damage, injury or loss of life, the products should only be
incorporated in systems designed with appropriate redundancy, fault tolerant or backup features.
SanDisk shall not be liable for any loss, injury or damage caused by use of the
Products in any of the following applications:
•Special applications such as military related equipment, nuclear reactor cont rol,
and aerospace
• Control devices for automotive vehicles, train, ship and traffic equipment
• Safety system for disaster prevention and crime prevention
• Medical-related equipment including medical measurement device