Again, as in the other thread, I believe you only need to put a jumper on pins 7 & 8 of the drive to make it work with v1.
This is only partially true, but does not apply at all to this particular drive. Allow me to explain.
The "pins 7 & 8 trick" only applies to certain 3.5" Advanced Format drives, for example the WD20EARS 2TB green drive (I've also got three of those in my X510). See the following link for details under the section titled "Advanced Format Special Jumper Setting: (for select 3.5" ADF drives only)":
As it mentions, this is only of value for a single-partition application, e.g. as a WHS V1 data drive. The WHS V1 boot drive has two partitions, so this jumper configuration will not help. The WD Align utility *MUST* be applied to successfully use an Advanced Format drive as a WHS V1 boot drive.
Now allow me to explain why this Pins 7&8 configuration does not apply to the AV-25 2.5" laptop style drive. As shown in the above linked web page under the section titled "SATA Mobile Hard Drive Jumper Settings", the drive only has jumper pins 1 through 4, and they do not provide any service for the Advanced Format support under legacy operating systems. Therefore, any use of the AV-25 Series drives in WHS V1 requires proper application of the WD Align utility.
I hope this clarifies this Advanced Format issue that can be confusing.