位置编码

用lsdev之后显示的下列设备位置编码一样，这是怎么回事呢，请高手指点
hdisk0       Available 00-08-00    SAS Disk Drive
hdisk1       Available 00-08-00    SAS Disk Drive
hdisk2       Available 00-08-00    SAS Disk Drive
hdisk3       Available 00-08-00    SAS Disk Drive
hdisk4       Available 03-08-01    MPIO Other FC SCSI Disk Drive
hdisk5       Available 03-08-01    MPIO Other FC SCSI Disk Drive
hdisk6       Available 03-08-01    MPIO Other FC SCSI Disk Drive
hdisk7       Available 03-08-01    MPIO Other FC SCSI Disk Drive
hdisk8       Available 03-08-01    MPIO Other FC SCSI Disk Drive