ขนาดที่ระบุคือความกว้างของเซิร์ฟเวอร์ (48.26 ซม.=19 นิ้ว) และความสูง (ทวีคูณ 4.445 ซม.) ความลึกของอุปกรณ์แตกต่างกัน มาตรฐานมาตรฐานแห่งชาติไม่ได้ระบุความลึกที่ต้องการ ดังนั้นความลึกของอุปกรณ์โดยผู้ผลิตอุปกรณ์เพื่อตรวจสอบ
19 indicates the width, that is, can be placed under the 19-inch rack server cabinet, so sometimes will meet this provision of the rack is called "19-inch rack".
19 inches is 482.6mm wide (equipment has "ears" on both sides, and the distance between the mounting holes of the ears is 465mm).
19 inch standard cabinet equipment installed in the height of the basic unit "U", 1U is 4.445cm, 2U is 1U 2 times 8.89cm. U is the effective use of space inside the cabinet, the use of 19 inch standard cabinet standard equipment panels are generally manufactured according to the specifications of n U.
The reason for specifying the size of the server is to keep the server properly sized for placement in a rack made of iron or aluminum. The rack has screw holes for fixing the server so that it can be aligned with the server's screw holes, and then screwed in place to facilitate the space needed to install each server.
Most engineering-grade equipment has a 19" panel width and 465mm mounting hole spacing, so the cabinet is standard as long as it can meet the installation of most 19" equipment.
