Sorry to be back here so soon, Need a little more help. 
I added a disk to the my array, the system cleared the disk but the option to format it never arrived. It is part of the array, but it does not have a file system and has a little "new device" blue dot next to it. The only thing I have available where the format option would be is a parity check. 

cdaystorage-diagnostics-20180202-2341.zip

Edited February 3, 20188 yr by TheCDay

Disk didn't clear successfully:

 

Quote

Feb  2 23:28:52 CDayStorage kernel: md: disk5 write error, sector=992
Feb  2 23:28:52 CDayStorage kernel: md: disk5 write error, sector=1000
Feb  2 23:28:52 CDayStorage kernel: md: disk5 write error, sector=1008
Feb  2 23:28:52 CDayStorage kernel: md: disk5 write error, sector=1016
Feb  2 23:28:52 CDayStorage kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6
Feb  2 23:28:52 CDayStorage kernel: ata1.00: BMDMA stat 0x66
Feb  2 23:28:52 CDayStorage kernel: ata1.00: failed command: WRITE DMA EXT
Feb  2 23:28:52 CDayStorage kernel: ata1.00: cmd 35/00:00:40:04:00/00:04:00:00:00/e0 tag 0 dma 524288 out
Feb  2 23:28:52 CDayStorage kernel:         res 51/84:e0:5f:05:00/84:02:00:00:00/e0 Emask 0x30 (host bus error)
Feb  2 23:28:52 CDayStorage kernel: ata1.00: status: { DRDY ERR }
Feb  2 23:28:52 CDayStorage kernel: ata1.00: error: { ICRC ABRT }

 

Most likely due to a bad SATA cable, replace the SATA cable and try again, also upgrade to latest stable and you'll get warned if there are more similar errors, if you have notifications enable.