Half-Height Drives; Measuring Internal Drive Temperatures; Full-Height Drives; Airflow And Cooling - HP LTO Ultrium Technical Reference Manual

Half-height drives

Air-flow must be from front to back. The required flow is 5 cfm for ambient air temperatures fluctuating
in the range 10°C 40°C.

Measuring internal drive temperatures

The recommended method of measuring the temperature of critical components is to read the "Max
temperature since cartridge loaded" after exercising the drive by writing data at the maximum data
rate for a period of at least one hour. This temperature correlates closely with the temperature of the
most critical ICs.

Full-height drives

Airflow should be from front to back. The maximum temperature at the Primary Temperature Sensor
should be:
• <25°C above ambient for 40°C maximum temperature ambient environment
• <30°C above ambient for 35°C maximum temperature ambient environment
This equates to:
• <65°C at 40°C ambient (8 cfm airflow)
• <65°C at 35°C ambient (6 cfm airflow)
Half-height drives
The maximum temperature at the Primary Temperature Sensor should be <25°C above ambient for
40°C maximum temperature ambient environment, equating to <65°C at 40°C ambient.

Airflow and cooling

HP LTO Ultrium drives require forced airflow that satisfies the following conditions:
• For full-height internal drives, the airflow at 35°C ambient air operation should be at least 6 cubic
feet per minute (0.17 cubic meters per minute or 10.19 cubic meters per hour) through the product.
Volume 1: hardware integration 17