We can get the serial number of the blade server by using the HP cmdlet Powershell script .
Download the HP cmdlet from the below link .
http://www8.hp.com/us/en/products/server-software/product-detail.html?oid=5440657#!tab=features
Install the HPOACmdlets-x64.msi and look for the pdf for the installation steps.
Get-Help *hp* – It will show all the commands related to the HP
Get-Help *hpoa* – It will show all the commands related to the HP-onboard administrator.
Get-HPOABladeDeviceSerialNumber cmdlet gets the specified direct attached blade device serial number and we need to provide the bay number.
Download the script from the below location.
Also by using the Find-HPiLO cmdlet , by providing the ilo ip’s of the blade we can get the serial number.
Related links:
Powershell script to find the HP Enclosure information
Powershell script to find the current status of the specified HP Enclosure Fan
Powershell script to find the basic health and status of the HP Enclosure
Powershell to get the graph report of VMware VMs configured Memory.
Techbrainblog 
Pingback: Powershell Script to update the ilo firmware from the list of IPs. | Techbrainblog
Pingback: Powershell script to update the Onboard Administrator firmware. | Techbrainblog