Sadly the array does not start, I only get this in a loop:
Jun 14 07:15:35 Tower kernel: ata8.00: error: { UNC }
Jun 14 07:15:35 Tower kernel: ata8.00: configured for UDMA/133
Jun 14 07:15:35 Tower kernel: sd 8:0:0:0: [sde] tag#15 UNKNOWN(0x2003) Result: hostbyte=0x00 driverbyte=DRIVER_OK cmd_age=3s
Jun 14 07:15:35 Tower kernel: sd 8:0:0:0: [sde] tag#15 Sense Key : 0x3 [current]
Jun 14 07:15:35 Tower kernel: sd 8:0:0:0: [sde] tag#15 ASC=0x11 ASCQ=0x4
Jun 14 07:15:35 Tower kernel: sd 8:0:0:0: [sde] tag#15 CDB: opcode=0x88 88 00 00 00 00 01 97 8e 9b 00 00 00 00 20 00 00
Jun 14 07:15:35 Tower kernel: I/O error, dev sde, sector 6837672704 op 0x0:(READ) flags 0x0 phys_seg 4 prio class 2
Jun 14 07:15:35 Tower kernel: md: disk29 read error, sector=6837672640
Jun 14 07:15:35 Tower kernel: md: disk29 read error, sector=6837672648
Jun 14 07:15:35 Tower kernel: md: disk29 read error, sector=6837672656
Jun 14 07:15:35 Tower kernel: md: disk29 read error, sector=6837672664
Jun 14 07:15:35 Tower kernel: ata8: EH complete
Jun 14 07:15:39 Tower kernel: ata8.00: exception Emask 0x0 SAct 0x10000 SErr 0x0 action 0x0
Jun 14 07:15:39 Tower kernel: ata8.00: irq_stat 0x40000000
Jun 14 07:15:39 Tower kernel: ata8.00: failed command: READ FPDMA QUEUED
Jun 14 07:15:39 Tower kernel: ata8.00: cmd 60/20:80:00:9b:8e/00:00:97:01:00/40 tag 16 ncq dma 16384 in
Jun 14 07:15:39 Tower kernel: res 41/40:20:00:9b:8e/00:00:97:01:00/00 Emask 0x409 (media error) <F>
Jun 14 07:15:39 Tower kernel: ata8.00: status: { DRDY ERR }
Jun 14 07:15:39 Tower kernel: ata8.00: error: { UNC }
Jun 14 07:15:39 Tower kernel: ata8.00: configured for UDMA/133
Jun 14 07:15:39 Tower kernel: sd 8:0:0:0: [sde] tag#16 UNKNOWN(0x2003) Result: hostbyte=0x00 driverbyte=DRIVER_OK cmd_age=3s
Jun 14 07:15:39 Tower kernel: sd 8:0:0:0: [sde] tag#16 Sense Key : 0x3 [current]
Jun 14 07:15:39 Tower kernel: sd 8:0:0:0: [sde] tag#16 ASC=0x11 ASCQ=0x4
Jun 14 07:15:39 Tower kernel: sd 8:0:0:0: [sde] tag#16 CDB: opcode=0x88 88 00 00 00 00 01 97 8e 9b 00 00 00 00 20 00 00
Jun 14 07:15:39 Tower kernel: I/O error, dev sde, sector 6837672704 op 0x0:(READ) flags 0x0 phys_seg 4 prio class 2
Jun 14 07:15:39 Tower kernel: md: disk29 read error, sector=6837672640
Jun 14 07:15:39 Tower kernel: md: disk29 read error, sector=6837672648
Jun 14 07:15:39 Tower kernel: md: disk29 read error, sector=6837672656
Jun 14 07:15:39 Tower kernel: md: disk29 read error, sector=6837672664
Jun 14 07:15:39 Tower kernel: ata8: EH complete