Datasheet

Zeus 2.5-Inch ATA Solid State Drive 11

Error Detection and 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, the 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 4 bytes in error and detecting up to 5 bytes in error. An extensive retry

algorithm is also implemented on all Zeus SSDs, so that single event disturbances such as ESD or

EMF occurring during a read operation can be readily overcome.

Reliability

• DC power is maintained as specified in the datasheet

• Errors caused by the host are excluded from rates

• Errors from the same causes are counted as 1 block

• Data stream is assumed random

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 previous sections.

Table 1. Error Limits

Built-In Self Test (BIST)

During power-up, the micro-controller tests the controller memory, 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 SSD’s status is reported as failed.

Mount Time

The amount of time required to initialize and mount a Zeus SSD varies according to the operating

system (Windows

, Linux

, etc.) in which the SSD is running and the storage capacity of the drive.

Seek Time

Unlike a magnetic rotating disk, the SSD has no read/write heads or platters. There is no seek time

or rotational latency issues. The SSDs dramatically improve transaction throughput, particularly for

applications that are configured to take advantage of the characteristics of the drive.

Error Type Maximum Number of Errors

Recoverable Data Error 1 bit in 10

Unrecoverable Data Error Less than 1 bit in 10