Hi all, This is on unraid 7.0.1 I'm looking for some support on how to replace two failing hard drives. Below is a snapshot of my array: Disk 1 and disk 2 were beginning to show smart errors so I've ordered two replacement drives, they are however 16TB drives. Disk 1: Disk 2: My thought process was to first replace the parity drive with a 16TB drive and let the parity rebuild, however during the rebuild I started getting the following syslog errors and 187 reported uncorrect started climbing on disk1: Feb 25 12:23:50 AnneFrankNAS kernel: ata4.00: exception Emask 0x0 SAct 0x72011c7f SErr 0x0 action 0x0
Feb 25 12:23:50 AnneFrankNAS kernel: ata4.00: irq_stat 0x40000008
Feb 25 12:23:50 AnneFrankNAS kernel: ata4.00: failed command: READ FPDMA QUEUED
Feb 25 12:23:50 AnneFrankNAS kernel: ata4.00: cmd 60/c0:c8:30:96:24/02:00:6e:00:00/40 tag 25 ncq dma 360448 in
Feb 25 12:23:50 AnneFrankNAS kernel: ata4.00: res 43/40:c0:80:97:24/00:02:6e:00:00/00 Emask 0x408 (media error) <F>
Feb 25 12:23:50 AnneFrankNAS kernel: ata4.00: status: { DRDY SENSE ERR }
Feb 25 12:23:50 AnneFrankNAS kernel: ata4.00: error: { UNC }
Feb 25 12:23:50 AnneFrankNAS kernel: ata4.00: configured for UDMA/133
Feb 25 12:23:50 AnneFrankNAS kernel: ata4: EH complete
Feb 25 12:23:56 AnneFrankNAS kernel: ata4.00: exception Emask 0x0 SAct 0x7fe0001f SErr 0x0 action 0x0
Feb 25 12:23:56 AnneFrankNAS kernel: ata4.00: irq_stat 0x40000008
Feb 25 12:23:56 AnneFrankNAS kernel: ata4.00: failed command: READ FPDMA QUEUED
Feb 25 12:23:56 AnneFrankNAS kernel: ata4.00: cmd 60/c0:a8:30:96:24/02:00:6e:00:00/40 tag 21 ncq dma 360448 in
Feb 25 12:23:56 AnneFrankNAS kernel: ata4.00: res 43/40:c0:60:98:24/00:02:6e:00:00/00 Emask 0x408 (media error) <F>
Feb 25 12:23:56 AnneFrankNAS kernel: ata4.00: status: { DRDY SENSE ERR }
Feb 25 12:23:56 AnneFrankNAS kernel: ata4.00: error: { UNC }
Feb 25 12:23:56 AnneFrankNAS kernel: ata4.00: configured for UDMA/133
Feb 25 12:23:56 AnneFrankNAS kernel: ata4: EH complete
Feb 25 12:24:26 AnneFrankNAS kernel: ata4.00: exception Emask 0x0 SAct 0x7ff0060f SErr 0x0 action 0x0
Feb 25 12:24:26 AnneFrankNAS kernel: ata4.00: irq_stat 0x40000008
Feb 25 12:24:26 AnneFrankNAS kernel: ata4.00: failed command: READ FPDMA QUEUED
Feb 25 12:24:26 AnneFrankNAS kernel: ata4.00: cmd 60/28:a0:50:81:2e/02:00:6e:00:00/40 tag 20 ncq dma 282624 in
Feb 25 12:24:26 AnneFrankNAS kernel: ata4.00: res 43/40:28:40:82:2e/00:02:6e:00:00/00 Emask 0x408 (media error) <F>
Feb 25 12:24:26 AnneFrankNAS kernel: ata4.00: status: { DRDY SENSE ERR }
Feb 25 12:24:26 AnneFrankNAS kernel: ata4.00: error: { UNC }
Feb 25 12:24:26 AnneFrankNAS kernel: ata4.00: configured for UDMA/133
Feb 25 12:24:26 AnneFrankNAS kernel: ata4: EH complete
Feb 25 12:25:37 AnneFrankNAS kernel: ata4.00: exception Emask 0x0 SAct 0xff00001f SErr 0x0 action 0x0
Feb 25 12:25:37 AnneFrankNAS kernel: ata4.00: irq_stat 0x40000008
Feb 25 12:25:37 AnneFrankNAS kernel: ata4.00: failed command: READ FPDMA QUEUED
Feb 25 12:25:37 AnneFrankNAS kernel: ata4.00: cmd 60/28:c0:b0:17:46/02:00:6e:00:00/40 tag 24 ncq dma 282624 in
Feb 25 12:25:37 AnneFrankNAS kernel: ata4.00: res 43/40:28:c8:18:46/00:02:6e:00:00/00 Emask 0x408 (media error) <F>
Feb 25 12:25:37 AnneFrankNAS kernel: ata4.00: status: { DRDY SENSE ERR }
Feb 25 12:25:37 AnneFrankNAS kernel: ata4.00: error: { UNC }
Feb 25 12:25:37 AnneFrankNAS kernel: ata4.00: configured for UDMA/133
Feb 25 12:25:37 AnneFrankNAS kernel: ata4: EH complete
Feb 25 12:25:43 AnneFrankNAS kernel: ata4.00: exception Emask 0x0 SAct 0x3fcd8 SErr 0x0 action 0x0
Feb 25 12:25:43 AnneFrankNAS kernel: ata4.00: irq_stat 0x40000008
Feb 25 12:25:43 AnneFrankNAS kernel: ata4.00: failed command: READ FPDMA QUEUED
Feb 25 12:25:43 AnneFrankNAS kernel: ata4.00: cmd 60/e0:30:e0:28:46/01:00:6e:00:00/40 tag 6 ncq dma 245760 in
Feb 25 12:25:43 AnneFrankNAS kernel: ata4.00: res 43/40:e0:30:29:46/00:01:6e:00:00/00 Emask 0x408 (media error) <F>
Feb 25 12:25:43 AnneFrankNAS kernel: ata4.00: status: { DRDY SENSE ERR }
Feb 25 12:25:43 AnneFrankNAS kernel: ata4.00: error: { UNC }
Feb 25 12:25:43 AnneFrankNAS kernel: ata4.00: configured for UDMA/133
Feb 25 12:25:43 AnneFrankNAS kernel: ata4: EH complete
Feb 25 12:25:53 AnneFrankNAS kernel: ata4.00: exception Emask 0x0 SAct 0x3e00 SErr 0x0 action 0x0
Feb 25 12:25:53 AnneFrankNAS kernel: ata4.00: irq_stat 0x40000008
Feb 25 12:25:53 AnneFrankNAS kernel: ata4.00: failed command: READ FPDMA QUEUED
Feb 25 12:25:53 AnneFrankNAS kernel: ata4.00: cmd 60/40:48:a8:a4:46/05:00:6e:00:00/40 tag 9 ncq dma 688128 in
Feb 25 12:25:53 AnneFrankNAS kernel: ata4.00: res 43/40:40:08:a9:46/00:05:6e:00:00/00 Emask 0x408 (media error) <F>
Feb 25 12:25:53 AnneFrankNAS kernel: ata4.00: status: { DRDY SENSE ERR }
Feb 25 12:25:53 AnneFrankNAS kernel: ata4.00: error: { UNC }
Feb 25 12:25:53 AnneFrankNAS kernel: ata4.00: configured for UDMA/133
Feb 25 12:25:53 AnneFrankNAS kernel: ata4: EH complete
Feb 25 12:26:24 AnneFrankNAS kernel: ata4.00: exception Emask 0x0 SAct 0x7c03003f SErr 0x0 action 0x0
Feb 25 12:26:24 AnneFrankNAS kernel: ata4.00: irq_stat 0x40000008
Feb 25 12:26:24 AnneFrankNAS kernel: ata4.00: failed command: READ FPDMA QUEUED
Feb 25 12:26:24 AnneFrankNAS kernel: ata4.00: cmd 60/b0:80:18:07:54/02:00:6e:00:00/40 tag 16 ncq dma 352256 in
Feb 25 12:26:24 AnneFrankNAS kernel: ata4.00: res 43/40:b0:48:07:54/00:02:6e:00:00/00 Emask 0x408 (media error) <F>
Feb 25 12:26:24 AnneFrankNAS kernel: ata4.00: status: { DRDY SENSE ERR }
Feb 25 12:26:24 AnneFrankNAS kernel: ata4.00: error: { UNC }
Feb 25 12:26:24 AnneFrankNAS kernel: ata4.00: configured for UDMA/133
Feb 25 12:26:24 AnneFrankNAS kernel: ata4: EH complete
Feb 25 12:26:44 AnneFrankNAS kernel: ata4.00: exception Emask 0x0 SAct 0xff SErr 0x0 action 0x0
Feb 25 12:26:44 AnneFrankNAS kernel: ata4.00: irq_stat 0x40000008
Feb 25 12:26:44 AnneFrankNAS kernel: ata4.00: failed command: READ FPDMA QUEUED
Feb 25 12:26:44 AnneFrankNAS kernel: ata4.00: cmd 60/40:00:78:af:5c/05:00:6e:00:00/40 tag 0 ncq dma 688128 in
Feb 25 12:26:44 AnneFrankNAS kernel: ata4.00: res 43/40:40:a8:b1:5c/00:05:6e:00:00/00 Emask 0x408 (media error) <F>
Feb 25 12:26:44 AnneFrankNAS kernel: ata4.00: status: { DRDY SENSE ERR }
Feb 25 12:26:44 AnneFrankNAS kernel: ata4.00: error: { UNC }
Feb 25 12:26:44 AnneFrankNAS kernel: ata4.00: configured for UDMA/133
Feb 25 12:26:44 AnneFrankNAS kernel: ata4: EH completeI realise now I probably should've swapped disk1 to the old parity dive when I assigned the 16TB as parity? I've cancelled the parity sync as I don't want to risk losing the data on disk1 (it has data we definitely don't want to lose). Could someone please walk me through how best to proceed? When I stop the array and assign the old parity drive back as parity it obviously wants to parity sync, if I then stop the array again it auto populates the 16TB as parity and I'm unable to assign another drive for disk1, nor can I start the array with disk1 unassigned: Hopefully I haven't borked it up already, thanks for any help! Frank