AP-SAFD25MAA008GS-ETT Apacer, AP-SAFD25MAA008GS-ETT Datasheet - Page 10

• Manufacturer Part Number: AP-SAFD25MAA008GS-ETT
• Description: Solid State Drives - SSD SAFD 25M3 SATA FLASH DRIVE SLC 8GB EXT
• Manufacturer: Apacer

Specifications of AP-SAFD25MAA008GS-ETT

• Rohs: yes
• Product: SATA Flash Drives
• Memory Size: 8 GB
• Sustained Read: 115 MB/s
• Sustained Write: 90 MB/s
• Active Mode Current: 360 mA
• Operating Supply Voltage: 5 V
• Maximum Operating Temperature: + 85 C
• Connector Type: 7-pin signal, 15-pin power
• Dimensions: 70 mm x 48.66 mm
• Minimum Operating Temperature: - 40 C

3.6
S.M.A.R.T. is an acronym for Self-Monitoring, Analysis and Reporting Technology, an open standard allowing
disk drives to automatically monitor their own health and report potential problems. It protects the user from
unscheduled downtime by monitoring and storing critical drive performance and calibration parameters. Ideally,
this should allow taking proactive actions to prevent impending drive failure.
Apacer SAFD 25M3 uses the standard SMART command B0h to read data from the drive for SMART feature
as the SATA Rev.2.6 ATA/ATAPI-7 specifications. Based on the SFF-8035i Rev. 2.0 specifications, Apacer
SMART defines vendor-specified SMART Attribute IDs (A0h, A1h, A2h, A3h, A4h-A5h) in SAFD25M3. They
represent initial bad block count, bad block count, spare block count, maximum erase count, and average
erase counts respectively. When the Apacer SMART Utility running on the host, it analyzes and reports the
disk status to the host before SAFD25M3 is in critical condition.
3.7
Made of millions of NAND flash cells, SSD can be written into groups called pages in 4K size generally, but
can only be erased in larger groups called blocks of 128 pages or 512KB. These stipulations are partially the
source of many performance issues. Until an address gets used again, the SSD has to keep track of every
last bit of data that’s written on it. The ATA-TRIM instruction tilts the balance in favor of the SSD. TRIM
addresses a major part of the performance degradation issue over time that plagues all SSDs. A TRIM
enabled drive running an OS with TRIM support will stay closer to its peak performance over time.
© 2011 Apacer Technology Inc.
S.M.A.R.T.
TRIM
AP-SAFD25MAAxxxxS-XXT
Serial ATA Flash Drive
9
Rev. 1.4