There are issues with multiple disks on multiple controllers:
Sep 9 23:07:49 Tower kernel: ata4: hard resetting link
Sep 9 23:07:55 Tower kernel: ata4: link is slow to respond, please be patient (ready=0)
Sep 9 23:07:59 Tower kernel: ata4: COMRESET failed (errno=-16)
Sep 9 23:07:59 Tower kernel: ata4: hard resetting link
Sep 9 23:08:01 Tower kernel: ata4: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
Sep 9 23:08:01 Tower kernel: ata4.00: configured for UDMA/33
Sep 9 23:08:42 Tower kernel: ata8: failed to read log page 10h (errno=-5)
Sep 9 23:08:42 Tower kernel: ata8.00: exception Emask 0x1 SAct 0x1000 SErr 0x0 action 0x6
Sep 9 23:08:42 Tower kernel: ata8.00: failed command: READ FPDMA QUEUED
Sep 9 23:08:42 Tower kernel: ata8.00: cmd 60/00:00:c8:6a:14/01:00:96:00:00/40 tag 12 ncq dma 131072 in
Sep 9 23:08:42 Tower kernel: res 01/04:60:c8:6a:14/00:00:96:00:00/40 Emask 0x3 (HSM violation)
Sep 9 23:08:42 Tower kernel: ata8.00: status: { ERR }
Sep 9 23:08:42 Tower kernel: ata8.00: error: { ABRT }
Sep 9 23:10:34 Tower kernel: ata13.00: exception Emask 0x1 SAct 0x1000 SErr 0x0 action 0x6
Sep 9 23:10:34 Tower kernel: ata13.00: failed command: WRITE FPDMA QUEUED
Sep 9 23:10:34 Tower kernel: ata13.00: cmd 61/00:00:f8:39:97/01:00:96:00:00/40 tag 12 ncq dma 131072 out
Sep 9 23:10:34 Tower kernel: res 01/04:58:f8:38:97/00:00:96:00:00/40 Emask 0x3 (HSM violation)
Sep 9 23:10:34 Tower kernel: ata13.00: status: { ERR }
Sep 9 23:10:34 Tower kernel: ata13.00: error: { ABRT }
Sep 9 23:10:34 Tower kernel: ata13: hard resetting link
Sep 9 23:11:03 Tower kernel: sd 6:0:3:0: [sdi] tag#803 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00 cmd_age=0s
Sep 9 23:11:03 Tower kernel: sd 6:0:3:0: [sdi] tag#803 CDB: opcode=0x88 88 00 00 00 00 01 93 77 f4 70 00 00 00 a0 00 00
Sep 9 23:11:03 Tower kernel: blk_update_request: I/O error, dev sdi, sector 6769079408 op 0x0:(READ) flags 0x0 phys_seg 20 prio class 0
Two of the controllers are Marvell based and have known issues, but ata4 is the onboard SATA, so there might be a power or connection issue, I would recommend replacing the SASLP/SAS2LP controllers with LSI anyway and then check all connections and/or test with a different PSU.