> For the complete documentation index, see [llms.txt](https://book.bsdcn.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://book.bsdcn.org/man/man8/diskinfo.8.md).

# diskinfo.8

`diskinfo` — 获取磁盘设备信息

## 名称

`diskinfo`

## 概要

`diskinfo [-ciStvw] disk ...`

`diskinfo [-l] -p disk ...`

`diskinfo [-l] -s disk ...`

## 描述

`diskinfo` 工具打印有关磁盘设备的信息，并可选择对该设备运行简单的性能测试。

可用选项如下：

**`-c`** 对 I/O 读命令的开销进行简单测量。

**`-i`** 执行简单的 IOPS 基准测试。

**`-l`** 在 `-p` 或 `-s` 模式下，在输出的每一行前面加上设备名称，使用制表符作为分隔符。

**`-p`** 返回磁盘的物理路径。这是一个标识磁盘在存储机柜中物理路径的字符串。

**`-S`** 执行同步随机写入测试（ZFS SLOG 测试），测量写入不同大小的数据块和刷新磁盘缓存所需的时间。大于 128KB 的数据块会使用多个并行操作写入。

**`-s`** 返回磁盘标识，通常为序列号。

**`-t`** 对磁盘的寻道和传输性能执行简单且相当粗糙的基准测试。

**`-v`** 每个字段单独占一行打印，并附带描述性注释。

**`-w`** 允许破坏性写入测试。

如果不给定参数，输出将为每个指定设备一行，包含以下字段：设备名称、扇区大小、媒体大小（字节）、媒体大小（扇区）、条带大小、条带偏移、固件柱面、固件磁头和固件扇区。最后三个字段仅在信息可用时才存在。

## 实例

列出前十个（至多）[da(4)](https://github.com/FreeBSD-Ask/freebsd-man-sc/blob/main/man4/da.4.md) 设备及其对应的序列号：

```sh
diskinfo -ls /dev/da?
```

## 参见

[da(4)](https://github.com/FreeBSD-Ask/freebsd-man-sc/blob/main/man4/da.4.md)

## 历史

`diskinfo` 命令出现于 FreeBSD 5.1。

## 作者

`diskinfo` 工具由 Poul-Henning Kamp <phk@FreeBSD.org> 编写。

## 缺陷

按严重程度递增顺序排列如下：谎言、该死的谎言、统计数据和计算机基准测试。


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