I opted to drop a 4th 8TB WD RED in my raid 5 array on my HP Microserver Gen8. It has a P222 raid card in it running the latest, as of today firmware: 8.32. I had the server running for about 2 years in it’s current configuration, with no issues, but I wanted a little more disk. If I had more slots, I would have opted for a raid 10, but I wanted smaller footprint, so this is what I am working with.
So far the transform has been about 36 hours, and running:
/opt/smartstorageadmin/ssacli/bin/ssacli ctrl slot=1 ld 1 show
in ESX 6.7, I am at 40%, oooofta. I imagine rebuilds with these large disks would be just as painful. Good news though, Unrecoverable Media Errors is 0.
MAKE SURE YOU HAVE BACKUPS, AND THAT YOU TEST SAID BACKUPS!!
MAKE SURE YOU HAVE BACKUPS, AND THAT YOU TEST SAID BACKUPS!!
Also make backups before you toy around with your raid, I have backups if this goes south, but always have backups.
Did I mention, HAVE BACKUPS AND TEST SAID BACKUPS!!