Vic/notes

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Contents 1 Data ONTAP 1.1 Target and LUN Queue Monitoring 1.2 Upgrades 1.3 FAS270 High CPU 1.4 Monitoring the Target Port Queues 1.5 Reverting to a previous kernel 1.6 Time sync

Data ONTAP

Target and LUN Queue Monitoring

• Log into the filer head and use the following commands to check LUN/Target queue stats while I/O is in progress.

• • lun stats -oi <interval>
  • fcp stats -i <interval>

Upgrades

• Upgrading ONTAP on a FAS3020
  • Move the release to an http server.
  • Then use "software install" to install it.
    • software install http://www.myserver.com/DOT/setup.exe -f 7.2.3
  • After successful installation enter "download"
  • Reboot after the download completes.
  • Once rebooted enter "version" to confirm the new kernel booted.
  • Note - 3020's require the pc_elf kernels, 270's require mips and 880's require pc_x86. Ensure that you install the correct kernel for your architecture.

FAS270 High CPU

• If this issue is caused by snapshots on flexvol volumes the “priority on” command at the Data ONTAP command prompt may provide some relief.

Monitoring the Target Port Queues

• igroup show -t -a -i 1

Reverting to a previous kernel

• Follow the same procedure as for upgrading but before the reboot enter revert_to.
• You can only revert back 2 versions so if you need to go from 7.2.2 to 6.x you will need to do the procedure twice; once to get to 7.0 and once to get to 6.x.

Time sync

• Enter commands in order listed
• options timed.log off
• options timed.max_skew 30m
• options timed.proto ntp
• options timed.sched 1h
• options timed.servers timehost1.eng.netapp.com
• options timed.window 0s
• options timed.enable on
• rdate timehost1.eng.netapp.com