EX4100 Disk Replacement

Hi,

Running an EX4100 4x6TB Raid 0 and have just seen a Bad Disk warning for disk 1.

I have just upgraded to OS5 but I am assuming it is an actual hardware issue.

I have essential data backed up elsewhere and will backup the remainder.

If I buy a replacement 6TB drive from the compatibility list is there anything else I need to know before swapping the disk? I have searched for instructions on disk replacement without sucess.

Can I run different disk sizes or do I have to use a 6TB drive or swap all 4 (something I am considering as they are all around 4 years old.)

Thanks for any assistance or pointers to threads I have missed in my search.

See the dedicated subforum for the OS5 My Cloud EX Series.

https://community.wd.com/c/OS5/my-cloud-ex-series/255

More importantly see the OS5 User Manual (HTML) for the EX4100.

This subforum (My Cloud) generally deals with the single bay/single drive My Cloud which is also not supported by OS5.