Evenin'
I have just finished the base configuration of my Unraid server.
I've installed a cache SSD from my collection of older drives. These drives were withdrawn from service from my main PC having being collected over the last couple of decades. I took the newest one (Crucial M500) and placed this into my Unraid server.
SMART is whinging on two drives: the 74GB, 20 year old HDD I've been using to test things like my configuration and HBA before trusting a data drive (expected, it's old), and the SSD. I don't put a great deal of faith in SMART, but the latter was very unexpected.
On the SSD SMART readout:
There's a UDMA CRC error count of 1. This is something I've decided, in my ignorance, to disregard.
There's also a relocate NAND block count of 65536. You read that number right.
The drive life is at 98%. This seems surprisingly good as it was a system drive for many years.
That number of NAND reallocations is suspicious to me. To my mind I might have maxed out the counter or a cluster of blocks has failed together.
Bearing in mind this drive was removed due to numerous problems with my SATA interface on my main PC, which I'd put down to having an ungodly number of drives collected over two decades. I did not bother to look for the root cause and just accepted drive hoarding is unhealthy and replaced the lot with a large SSD and a single backup HDD.
Any insight would be appreciated.