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0xC0000022L
Asked: 2013-02-12 08:44:49 +0800 CST

全新设置：如何告诉 mdadm 不要费心同步 _data_？还是必须的？

  • 772

两个问题：

  1. 如果有的话，我怎么知道mdadm新创建的数组不需要同步，因为上面没有数据？即基本上强制它进入一种状态，假设“数据”（即广阔的空白空间）是同步的并且只同步元数据？
  2. 如果以上几点不可能，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否则为空的数组？
linux

1 个回答

  1. Best Answer

    您可以使用该--assume-clean选项。来自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.
    • 3

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