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1. How does Memtech calculate the
endurance of its products?
The flash used in Memtech's drives are NAND EEPROM,
and can endure 250,000 to 1 million erase/write cycles
in EACH block without any remapping technology.
On the AT2500, AT3500 and SC35 series of products,
Memtech uses its proprietary Active Remap™ technology
to recover failing memory cells. This process is automatic
and transparent to the user. If a page in memory fails
to erase or program, the entire block is permanently
moved to a spare location in memory, and the failing
block is mapped out of active memory. Spare locations
are selected when the device is first initialized, so
there is no loss of user addressable memory. There are
100 spare locations for each 100 Mbytes of memory, so
an individual block could fail up to 100 times before
the drive becomes unusable, though even then, the data
would still be available for reading.
On the Mighty series of products, wear-leveling and
remapping is used to handle failed memory locations.
The equation used to calculate MTBF for Mighty drives
and an example calculation is given below:
The MTBF can be logically calculated in hours using
the following formula.
Note: The program area is the area that is not changed
once it has been programmed. The remainder of the drive
is thus considered "Reprogrammable". In the
case where 32 Kbytes (64 sectors) are written every
5 minutes into an area occupying 30% of a 48 MB disk
(64 Mbit x 6 chips, 1024 Blocks per chip), the MTBF
is calculated as shown below:
2. What are the capacity ranges
available for Memtech's products or what if I need a
capacity that's not available as a standard size?
Most products can be configured with a minimum of 64
Mbytes and a maximum as listed on their respective data
sheets. Drives under 128 Mbytes can be configured in
64 Mbyte increments, while drives over 128 Mbytes are
configured in 128 Mbyte increments. For a semi-custom
drive size, minimum quantities may apply.
3. What part numbering system does
Memtech use?
Please see our Part Numbering Guide by following the
link here.
4. Where can I buy Memtech's products?
All sales are factory direct. You can contact us either
by Email, fax or phone. See theContact
Page for more information.
5. Does Memtech accept credit cards?
Though Memtech does not as yet have an e-commerce site,
you can use a credit card to order your products by
calling 949-260-8345. Once your credit card number is
given and verified, your order will be processed as
quickly as possible. Credit cards are not billed until
the product has shipped.
6. Why should I buy a Memtech solid
state flash drive?
Memtech's extreme solutions offer the most reliable
storage available in standard drive form-factors. Our
products thrive in the toughest of applications, including
space, deep undersea – wherever extreme conditions
exist. The drives are BUILT and TESTED to survive using
Memtech's five-point Enduro™ Test. By exposing
the drive to environmental extremes during testing,
we're assured it will fully function in the customer's
environment. This testing and our new limited lifetime
warranty means the ultimate in product reliability and
performance.
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