IBM Deskstar 25GP Installation And Reference Manual page 66

clip jumper can be used to truncate the cylinder and LBA count of your drive to 4,096
cylinders (2 GB capacity).
For a DPTA model drive with a capacity lower than 34GB:
If your BIOS is incompatible with cylinder values higher than 4,096 cylinders, the 2/32 GB
clip jumper can be used to truncate the cylinder count of your drive to 4,096 cylinders (2
GB capacity). The LBA value of the drive is unchanged.
For a drive with a capacity of 34GB or higher:
If your BIOS is incompatible with LBA values higher than 66,055,248 sectors, the 2/32
GB clip jumper can be used to truncate the LBA value to 66,055,248 sectors (32 GB
capacity). Alternatively, BIOS upgrades may be available to overcome this limitation.
Contact your BIOS manufacturer for more information.
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