メインコンテンツまでスキップ

NetApp_Insight_2020.png 

Continuous Linux Host DMMP failovers with Oracle ASM, within an ONTAP FAS environment

Views:
7
Visibility:
Public
Votes:
0
Category:
fas-systems
Specialty:
san
Last Updated:

Applies to

  • ONTAP 9
  • Data ONTAP 8
  • Data ONTAP operating in 7-Mode
  • Oracle ASM
  • Device Mapper Multipath (DMMP)

Issue

The following symptoms are possible with the FAS SAN product:

  • Partner path traffic
  • Partner path misconfigured ASUP alerts
  • Performance impact

 

The following error messages is reported repeatedly in the host logs (/var/log/messages):

May 18 03:47:40 hostname kernel: sd 5:0:0:3: rdac: array example, ctlr 0, queueing MODE_SELECT command
May 18 03:47:40 hostname kernel: sd 5:0:0:3: rdac: array example, ctlr 0, MODE_SELECT returned with sense 06/94/01
May 18 03:47:40 hostname kernel: sd 5:0:0:3: rdac: array example, ctlr 0, retrying MODE_SELECT command
May 18 03:47:40 hostname kernel: sd 5:0:0:3: rdac: array example, ctlr 0, MODE_SELECT completed
May 18 03:48:00 hostname multipathd: vol1: load table [0 209715200 multipath 1 queue_if_no_path 1 rdac 2 1 round-robin 0 1 1 8:144 1 round-robin 0 1 1 8:112 1]
May 18 03:48:21 hostname multipathd: vol3: load table [0 629145600 multipath 1 queue_if_no_path 1 rdac 2 1 round-robin 0 1 1 8:80 1 round-robin 0 1 1 8:64 1]
May 18 03:48:21 hostname kernel: sd 5:0:0:1: rdac: array example, ctlr 0, queueing MODE_SELECT command
May 18 03:48:21 hostname kernel: sd 5:0:0:1: rdac: array example, ctlr 0, MODE_SELECT returned with sense 06/94/01May 18 03:48:21 hostname kernel: sd 5:0:0:1: rdac: array example, ctlr 0, retrying MODE_SELECT command
May 18 03:48:21 hostname kernel: sd 5:0:0:1: rdac: array example, ctlr 0, MODE_SELECT completed
May 18 03:48:40 hostname multipathd: vol2: load table [0 209715200 multipath 1 queue_if_no_path 1 rdac 2 1 round-robin 0 1 1 8:160 1 round-robin 0 1 1 8:176 1]
May 18 03:48:40 hostname multipathd: vol2: load table [0 209715200 multipath 1 queue_if_no_path 1 rdac 2 1 round-robin 0 1 1 8:160 1 round-robin 0 1 1 8:176 1]
May 18 03:48:40 hostname kernel: sd 6:0:0:4: rdac: array example, ctlr 1, queueing MODE_SELECT command
May 18 03:48:40 hostname kernel: sd 6:0:0:4: rdac: array example, ctlr 1, MODE_SELECT returned with sense 06/94/01
May 18 03:48:40 hostname kernel: sd 6:0:0:4: rdac: array example, ctlr 1, retrying MODE_SELECT command
May 18 03:48:40 hostname kernel: sd 6:0:0:4: rdac: array example, ctlr 1, MODE_SELECT completed

 

 

CUSTOMER EXCLUSIVE CONTENT

Registered NetApp customers get unlimited access to our dynamic Knowledge Base.

New authoritative content is published and updated each day by our team of experts.

Current Customer or Partner?

Sign In for unlimited access

New to NetApp?

Learn more about our award-winning Support