Advise needed: faulty drive needs replacement, are these compatible?

[rj_dsl]

Hello there..

I have a faulty drive that is reporting bad sectors, and I want to replace it with a bigger capacity drive..

My current drives are:
Model Family: HGST Ultrastar 7K6000
Device Model: HGST HUS726040ALE610

I have 5 i total, and 1 in hot-spare..

I have my eye on the following:
Ultrastar DC HC310 6TB Sata-600 - Data Sheet
HGST Ultrastar 7K6000 6TB Sata-600 - Data Sheet

My question(s) are:

1. Can I introduce a higher capacity drive to the pool, without changing all the disks? Will the pool auto grow in size?
2. Is the sector sizes important? The current drives are 512 logical/4096 physical.. Does that exclude one of the drives listed above?

The plan is to slowly introduce new higher capacity drives as replacement for the current drive (3 are from the same "batch" so I suspect the may also be a risk of failing in a not to distant future)..

Any advise would be appreciated :)

 

[Samuel Tai]

This is covered in the Guide, Section 10.5.2. You can swap out your current disks, one at a time, resilvering after each replacement. Once the last member of the mirror completes resilvering, the vdev will automatically grow to the size of the smallest disk currently in the pool. 4096 physical sectors are OK.