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Booting ESXi 4.1 from a different logical Drive

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I have a client with a HP ML350 G5 running VMware ESXi 4.1.    Running 12GB ram, they had a 1 TB Raid 5 array running on (3) 500GB sata disks on an e200i raid controller with 128mb ram.   On original disk array are 3 logical drives, drives 1, 2, and 3, respectively.   Disk 1 is 16gb for VMware, disk 2 is 480GB for OS volumes, and disk3 is 500GB for data volumes.    Running on the server is 1 Windows 2003 SBS server running 32 bit, and 5 windows XP guests set up on an active directory domain.  

The raid has been problematic….lost at least one drive every 6 months, and rebuilds were taking forever, making everything crawl during rebuild periods.        
I recommended memory upgrades for the server to 16gb, a new p400 raid controller with 512mb ram, and 3 146 gb SAS dries to populate the rest drive cage with, possibly to use to boot the ESX, and put the OS volume for the server on.

I connected the drive cage to the new raid controller and it saw the original array and 3 logical disks.  However, when I added a new array created with the 3 SAS drives, the existing drives that were logical disks 1, 2 and 3, became Logical disks 2, 3 and 4.   The new SAS array became logical disk 1, and as such the server now attempts to boot from it.   That’s ok, but when I attempted to install ESX on the logical Disk 1, it completes, but when I boot ESX, it fails with some sort of conflict because there is already an install of VMware on logical disk 2.    I can’t DELETE logical disk 2 using the ACU, because it is not the LAST disk on the original array.  I even booted the Smart Start, and I can’t do anything with that either.

My question is:  How do I DISABLE the ESX installation on what is now logical drive 2, so that I can boot ESX from logical drive 1, which will obviously be faster, as it is made of 15K SAS drives.
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Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

Commented:
Why not scrap installing ESXi on local disk and install USB flash drive?
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

Commented:
You could download GParted LiveCDROM and delete the old ESXi partitions.

What is the error message you could use the grub boot sequence to override
VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017
Commented:

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Commented:
OK, so the comand worked.  I was able to boot the new ESX installation on the new array.

Here's my question now:

When the new installation of ESXi boots, and I go into disk configuration, I can see all 3 logical disks on the original array.   It appears I can just select the first logical disk on the original array, the one that has original vmware installation on it, and delete it.

Can't I resolve my boot issue that way?
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

Commented:
Yes, you can remove the installation, as I suggested also in using GParted LiveCDROM and delete the old ESXi partitions..