Tried to add a second parity disk. Parity writing worked for several hours then I started getting errors. Parity device disabled, and Disk in error state.
As I was trying to start and stop the array in maintenance mode, I noticed that those disks were disappearing and reappearing, and I believe the device names were changing (sdm and sdl at one point, later sde and sdk).
My only thought is that the power for these two disks is dropping so they're getting disconnected, but I'm unsure of how to confirm this in the diagnostic logs. These two happen to be running off a molex-sata adapter. I'm just hoping for help confirming the error before I go rewiring everything and replacing sata cables (my case is a mess).
I also tried going back to one parity disk. Stays in error state.
Original parity: WDC_WD80EMAZ-00WJTA0_7SJG85KW
New Parity: WDC_WD80EZAZ-11TDBA0_7SJ3MU5U
Thanks
server-diagnostics-20190811-1422.zip
Edit: noticed my two parity devices weren't being detected when I created the diagnostics zip so there's no SMART report for them. Added those.
WDC_WD80EZAZ-11TDBA0_7SJ3MU5U-20190811-1437 (sdk).txt
WDC_WD80EMAZ-00WJTA0_7SJG85KW-20190811-1437 parity (sde) - DISK_DSBL.txt