PVS Targets experience slow boot

PVS Targets experience slow boot

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Article ID: CTX233881

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Description

  •  Scenario 1 : After PVS software is upgraded
​Provisioning Services Target Devices, that are using a BOOT.ISO to boot, experience an unusually slow boot time.
The Targets can take anywhere from five to twenty minutes to boot.

After the Target Device finally boots and it reaches the Windows Login screen, the Target Devices actually perform normally with no performance impact at all.

The behavior is encountered after the Provisioning Services Server software has been upgraded.
  • Scenario 2: Faulty vdisk
​In a multi-PVS servers farm, when booting one target device at the time, the boot time is relatively fast (under 2 minutes) when mutiple target devices (say more than 10) are booted simultaneously some target devices take up to 4  minutes to boot

Resolution

  1. Create a new BOOT.ISO using the BDM Tool shipped with the newly installed version of the Provisioning Services Server software.
  2.  Create new vdisk. ( You can capture Wireshark to validate if the slow boot is seen in any one of the PVS Servers or not?)

Problem Cause

This issue can be seen when the Target Device uses a BOOT.ISO created with a version of the Provisioning Services Server software older than the currently installed version of the Provisioning Services Server software.

When a Target Device uses BOOT.ISO to boot, it goes through the TSB (Two Stage Boot) process.
In the first stage of the TSB process the executable code inside the BOOT.ISO is loaded and executed. This code then downloads a second piece of code from the Provisioning Services Server in the form of a file named TSBBDM.BIN.

In the case the Provisioning Services Server software is upgraded, there will be a new version of the TSBBDM.BIN file on the server.
If the version of the BOOT.ISO is different than the version of the TSBBDM.BIN file, it can cause issues such as very slow boot times.

 

Issue/Introduction

Article addresses PVS Slow boot scenarios
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