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Status Delivered
Workspace AIX
Created by Guest
Created on Dec 6, 2017

RELATED IDEAS

LVM hardening to prevent non-detection of bad blocks in mirrored LVs

LVM mirroring can delay detection of errors on the secondary copy until the primary copy fails - leading to outages. Particularly with parallel or parallel/sequential policy and LVs with low write rates, the disk with the second copy gets relatively little IO. If that disk develops bad blocks they can stay undetected until the disk with primary copy fails.

An 'on by default' low intensity background scan will help by flagging bad blocks before the disk containing the other copy fails. Scanning once every week or two should be sufficient.

Idea priority Medium
  • Guest
    Reply
    |     Aug 19, 2019

    mirscan commnad provides the requested functionality. The mirscan command searches for and corrects physical partitions that are stale or unable to perform I/O operations.
    https://www.ibm.com/support/knowledgecenter/en/ssw_aix_72/m_commands/mirscan.html

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