DiskCheckup DCO question

[MikeDuke]

Under the hidden areas tab when I click on Modify HPA/DCO I can alter the Max User LBA but why cant I change the Max Native LBA?

It has worked for me in the past on a different computer.

Thanks

[David (PassMark)]

Maybe it isn't supported by the drive / interface.
Was there an error message, or is it greyed out?

[MikeDuke]

It's greyed out for me. I tested the drive on a borowed computer running an older version of diskcheckup and it worked just fine.

[MikeDuke]

Update: Tried the older version on my computer as well and still the same issue of it being greyed out. Must be something with my computer?

[David (PassMark)]

Depending on the hard disk, the HPA/DCO areas may be locked and therefore cannot be changed. This is indicated by "N/A" for the appropriate fields.

So it is bit strange the behavior is dependent on the computer and not the drive. Maybe it is also a function of the device driver or disk controller or BIOS.