Z6S248C STEC, Z6S248C Datasheet - Page 27

• Manufacturer Part Number: Z6S248C
• Manufacturer: STEC
• Type: Solid State Driver

Specifications of Z6S248C

• Density: 48GByte
• 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
• Lead Free Status / RoHS Status: Compliant

Zeus 2.5-Inch Serial ATA Solid State Drive
Endurance
The useful life of flash media is limited by the number of write/erase operations that can be performed
on the media. To extend the useful life of Zeus SSDs, special wear-leveling and bad-block mapping
algorithms are integrated in the firmware.
Wear-Leveling Algorithm
The dynamic wear-leveling algorithm integrated in the firmware guarantees that erase/write cycles
are evenly distributed across all of the flash memory block locations. Wear-leveling eliminates
repeated writes to the same physical flash memory location, thereby preventing blocks from
premature wear.
Bad-Block Management
The bad-block mapping algorithm replaces bad-blocks with new ones from available spares. Two
percent (2%) of the flash memory is held in reserve (spare blocks) for bad block replacement. Bad
blocks in the media are flagged when detected. The next time an attempt is made to access a flagged
block, it is immediately replaced by a spare block. The bad-block mapping function enables data to
be automatically transferred from a bad sector to an available spare block.
Notes:
Data Retention
Data stored on Zeus SSDs remains valid for 10 years without requiring power support. The unit can
be stored under certain environmental conditions for extended periods without any occurrence of
data degradation.
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STEC Inc. scans for bad blocks during the manufacturing process at the initial installation
of the flash components. Bad blocks are mapped and identified during the manufacturing
process.
The maximum amount of available user space will not be less than 97% of the total flash
capacity, i.e., the reserved space will not exceed more than 3% of the total drive volume.
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