[sersi]

My synology NAS is for my own use. I do not keep spare drives on hand, I would go to the nearby shop that's 20 minutes away from me to get a new drive. They wouldn't have synology branded drives but they have the toshiba MG series, Western Digital and Seagate.

Within my NAS, I have 2 different pool, 1 is for important data, it's 2 hard disk with SHR1 replicated to an offsite NAS. Another pool is for less important data (movies, etc), it's SHR1 with 5 hard disks, 75TB total capacity, none of the hard disks are the same batch or production date. Not having the data immediately is not a problem. Losing that data would suck but I'd rebuild so I'm fine not having a spare drive on hand.