Slow storage device discovery causes bootbank/scratch to not get mounted
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Slow storage device discovery causes bootbank/scratch to not get mounted

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Article ID: 341655

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Updated On:

Products

VMware vSphere ESXi

Issue/Introduction

Symptoms:
As a result of slow device discovery, the LUN might not be available. The slow discovery might be caused by such issues as slow login to target ports or fabric delays.

Environment

VMware vSphere ESXi 6.7
VMware vSphere ESXi 6.5
VMware vSphere ESXi 6.0
VMware vSphere ESXi 7.0.0

Resolution

To compensate for possible delays, you can configure device path discovery wait time.
  1. Install ESXi on a Boot LUN.
  2. During the ESXi boot, configure the boot option devListStabilityCount=10 (10 Seconds) by pressing Shift+O.
ESXi boots with bootbank mounted to the right volume.
  1. Edit /bootbank/boot.cfg to add the devListStabilityCount=10 entry to the kernelopt field.
For example, kernelopt=installerDiskDumpSlotSize=2560 no-auto-partition devListStabilityCount=10.
  1. Reboot the ESXi host several times to make sure that it boots successfully.
  2. Verify Boot from SAN on iSCSI and Fibre Channel protocols.


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