Z4S264C STEC, Z4S264C Datasheet - Page 28

• Manufacturer Part Number: Z4S264C
• Manufacturer: STEC
• Type: Solid State Driver

Specifications of Z4S264C

• Density: 64GByte
• Operating Supply Voltage (typ): 5V
• Operating Temperature (min): 0C
• Operating Temperature (max): 70C
• Package Type: Not Required
• Mounting: Screw
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 4.75V
• Operating Supply Voltage (max): 5.25V
• Programmable: Yes
• Lead Free Status / RoHS Status: Not Compliant

10
Reliability
Error Rates
Table 1 lists the error limit specifications. When all data correction mechanisms are enabled, the error
rate will be sustained through all operating temperature ranges as specified in the upcoming sections.
Erase Cycles
The drive design implements the a wear-leveling algorithm to enhance the life of the flash. The SSDs
maintain at least 2 million erase cycles over the entire flash. The wear-leveling algorithm ensures the
entire volume is cycled, including the static and the dynamic data.
Error Detection and Error Correction
The Error Detection Code and Error Correcting Code (EDC/ECC) helps maintain data integrity by
allowing single or multiple bit corrections to the data stored in the flash array. If the data in the flash
array is corrupted due to aging or during the programming process, EDC/ECC will compensate for
the errors to ensure the delivery of accurate data to the host computer. The EDC/ECC engine is
capable of correcting up to four (4) bytes in error and detecting up to five(5) bytes in error. An
extensive retry algorithm is also implemented on all Zeus SATA SSDs, so that single event
disturbances such as ESD or EMF occurring during a read operation can be readily overcome.
Built-In Self Test (BIST)
The micro-controller tests the controller memory during power-up, and then performs a back-end
status check to verify proper flash memory controller operations. If a fault condition is detected in the
flash memory controller, the status of the SSD is reported as failed.
ATA Modes
The Zeus 2.5-inch SATA SSD supports the following ATA operating modes:
•
•
•
PIO Modes 0 through 4
UDMA Modes 0 through 5
Serial ATA 2.0 (1.5Gb)
Error Type
Recoverable Data Error
Unrecoverable Data Error
Table 1.
Error Limits
Maximum Number of Errors
1 bit in 10
Less than 1 bit in 10
Zeus 2.5-Inch Serial ATA Solid State Drive
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