pio(programmed input output，可编程输入输出模式)
prml(partial response maximum likelihood，最大可能部分反应，用于提高磁盘读写传输率)
rpm(rotation per minute，转/分)
rsd: removable storage device(移动式存储设备)
scsi(small computer system interface，小型计算机系统接口)
scma：scsi configured auto magically，scsi自动配置
s.m.a.r.t.(self-monitoring， analysis and reporting technology，自动监测、分析和报告技术)
sps(shock protection system，抗震保护系统)
sta(scsi trade association，scsi同业公会)
