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全新设置：如何告诉 mdadm 不要费心同步数据？还是必须同步？

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全新设置：如何告诉 mdadm 不要费心同步数据？还是必须同步？

两个问题：

  1. mdadm我如何才能知道，由于新创建的数组中没有数据，因此不需要同步？也就是说，基本上强制它进入一种状态，即假定“数据”（即巨大的空白空间）已同步，并且仅同步元数据？
  2. 如果上述观点不可能，为什么？同步是否考虑了实际的坏扇区，或者为什么我必须同步一个原本为空的数组？

答案1

您可以使用该--assume-clean选项。从man：

Tell mdadm that the  array  pre-existed  and  is
known to be clean.  It can be useful when trying
to recover from a major failure as  you  can  be
sure  that  no  data will be affected unless you
actually write to the array.   It  can  also  be
used when creating a RAID1 or RAID10 if you want
to avoid the initial resync, however this  prac‐
tice — while normally safe — is not recommended.
Use this only if you really know  what  you  are
doing.

When  the  devices  that  will  be part of a new
array were filled with zeros before creation the
operator  knows  the array is actually clean. If
that is the case, such  as  after  running  bad‐
blocks,  this argument can be used to tell mdadm
the facts the operator knows.

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