linux - SCSI LUN id 是什么意思，有什么用？

Question

在 Linux 中，ioctl SCSI_IOCTL_GET_LUNID 中的 LUN id 是什么意思？这意味着什么？它将如何提供帮助？

Answer 1

LUN id是Logical Unit Number，指的是一个存储设备。

摘自他评论中链接的维基百科文章 tMC:

LUN 0: There is one LUN which is required to exist in every target: zero. The logical unit with LUN zero is special in that it must implement a few specific commands, most notably Report LUNs, which is how an initiator can find out all the other LUNs in the target. But LUN zero need not provide any other services, such as a storage volume.

因此每个目标都有一个 LUN 0。如果一个目标有更多的存储卷，它可以有更多的 LUN。