According to the screen shot you have 48-bit enabled, it seems the limitation for you is UDMA100, if you can get that switched to UDMA133 or a bios update can , then you will be able to use all the HDD for the boot partition.
The tools are running off the 48-bit enabled LBA and seeing all the drive. The issue is Windows will not work the same way unless you can change that UDMA100 spec.
1. ATA/ATAPI-6 - Ultra DMA 5 is UDMA100.
2. ATA/ATAPI-7 - Ultra DMA 6 is UDMA133.
Windows requires the second to enable the "larger than 137GB" partitioning.
At least it is how I'm reading it.
See wiki - »en.wikipedia.org/wiki/Pa ··· llel_ATA
The table half way down is where I sourced the info to cross reference your image - "ATA standards versions, transfer rates, and features"
and the link to the Seagate PDF gives you system requirements.
Although the screen shot suggests it is compatible with ATA/ATAPI-8. A little confusing really. I gather only a DELL updated bios will allow you to address UDMA133. Maybe send a request to support and ask this question, and a link to this topic, they maybe kind enough to help you out.--
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