RAID 6 data storage server one hard derive fail

Mar 17, 2018
1
0
10
Hi Goodmorning all,

Currently we using RAID-6 array for storage data, total 5 hard disk and each capacity 2TB, this time one hard disk showing fail, we have no 2TB or higher capacity hard disk in stock, can we replace with 1TB hard disk.
What is impact, after replacing low capacity one hard disk and raid array capacity.

Please suggest.