What is the meaning of "show paths" output in multipathd -k

Solution Unverified - Updated -

Issue

  • Run multipathd -k, and execute show paths command, for example:
multipathd> show paths
hcil    dev dev_t  pri dm_st   chk_st  next_check      
0:0:0:1 sda 8:0    1   [active][ready] XXXXXXXX.. 16/20
1:0:0:1 sdb 8:16   1   [active][ready] XXXXXXXX.. 16/20
2:0:0:1 sdc 8:32   1   [active][ready] XXXXXXXX.. 16/20
3:0:0:1 sdd 8:48   1   [active][ready] XXXXXXXX.. 16/20
4:0:0:1 sde 8:64   1   [active][ready] XXXXXXXX.. 16/20
5:0:0:1 sdf 8:80   1   [active][ready] XXXXXXXX.. 16/20
7:0:0:1 sdg 8:96   1   [active][ready] XXXXXXXX.. 16/20
6:0:0:1 sdh 8:112  1   [active][ready] XXXXXXXX.. 16/20
#:#:#:# vda 252:0  1   [undef] [ready] [orphan]        
#:#:#:# vdb 252:16 1   [undef] [ready] [orphan]
  • Need to know what are the meanings of "undef" and "orphan", and the meaning of next_check field

Environment

  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • device-mapper-multipath

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Close

Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.