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为什么在执行 "LUN resize (调整 LUN 大小) " 后实际 LUN 大小略大于指定大小?

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适用场景

SAN

问题解答

  • 要调整大小的实际 LUN 大小取决于柱面大小。
  • 柱面大小因操作系统类型和 LUN 大小而异。
  • 如果指定的大小不能完全被圆柱大小值整除,则会增加相应的大小不足。
  • 柱面大小 = 每个扇区的字节数 * 每个磁道的扇区数 * 每个柱面的磁道数
  • 可以从 LUN.xml AutoSupport 中检查相关信息。

clipboard_e77eceb0f43a48bcc532b9310fe072025.png

示例:

将 LUN 大小调整为 1200 MB ,其柱面大小为 9 MB 。
1200/9=133.3333333...MB
1200 不能完全可分割,需要额外增加 6 MB 。
因此,实际 LUN 大小会自动更改为 1206MB 。

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