Quote:
Originally Posted by eureka
p4 has an [embedded] partition table on it's own. You can edit this table, shrink userstore parition (it's a single partition embedded in p4) from the end, then add a new primary partition into freed space of p4. ...
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That is TOTALLY normal. In fact, a standard MBR partition table can only have FOUR primary partitions. Any additional partitions must be in an extended partition (which has its own partition table). This is exactly what you are seeing -- p4 is an extended partition. This is normal on anything with an MBR partition table (which works on pretty much any computer or embedded device, as opposed to GPT partitions which are typically restricted to large powerful devices).