Resizing existing partition

[soulartist]

El Capitan

Has anyone successfully resized a partition with the new disk utility?

I have 3 partitions on an external drive. I want to increase the size of the time machine partition without erasing data on the partition that I want to reduce its size.

 

[honestone]

I have not used the new version of Disk Utility in El Capitan to resize a partition, but it should work fine.

 

[soulartist]

I did try to resize an existing partition, but after about an hour, I got an error of failed.

 

[honestone]

Hmm, wonder if there are any issues with the drive itself? Did you run Disk Utility's First Aid on the drive/partitions to check it out? That might be a good, first step.

 

[soulartist]

The external WD drive is okay, but I will run DU first aid, as you suggested.

 

[honestone]

WD drives are notorious with "not playing nicely" with Macs. Let's hope it is OK for re-partitioning. Running Disk Utility to repair it is a good idea, although having a more robust disk miantennane/repair program like TechTool Pro or Disk Warrior would be better.