dmesg output on superblock issue

[ago 3 02:57] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[  +0.000003] ata1.00: irq_stat 0x40000001
[  +0.000003] ata1.00: failed command: READ DMA EXT
[  +0.000006] ata1.00: cmd 25/00:08:00:a0:32/00:00:6b:00:00/e0 tag 23 dma 4096 in
                       res 51/40:08:00:a0:32/00:00:6b:00:00/e0 Emask 0x9 (media error)
[  +0.000002] ata1.00: status: { DRDY ERR }
[  +0.000002] ata1.00: error: { UNC }
[  +0.139395] ata1.00: LPM support broken, forcing max_power
[  +0.006253] ata1.00: LPM support broken, forcing max_power
[  +0.000085] ata1.00: configured for UDMA/133
[  +0.000031] sd 0:0:0:0: [sda] tag#23 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE cmd_age=2s
[  +0.000007] sd 0:0:0:0: [sda] tag#23 Sense Key : Medium Error [current]
[  +0.000006] sd 0:0:0:0: [sda] tag#23 Add. Sense: Unrecovered read error - auto reallocate failed
[  +0.000005] sd 0:0:0:0: [sda] tag#23 CDB: Read(10) 28 00 6b 32 a0 00 00 00 08 00
[  +0.000007] blk_update_request: I/O error, dev sda, sector 1798479872 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
[  +0.000040] ata1: EH complete
[  +2.280775] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[  +0.000003] ata1.00: irq_stat 0x40000001
[  +0.000003] ata1.00: failed command: READ DMA EXT
[  +0.000004] ata1.00: cmd 25/00:08:00:a0:32/00:00:6b:00:00/e0 tag 24 dma 4096 in
                       res 51/40:08:00:a0:32/00:00:6b:00:00/e0 Emask 0x9 (media error)
[  +0.000002] ata1.00: status: { DRDY ERR }
[  +0.000001] ata1.00: error: { UNC }
[  +0.120179] ata1.00: LPM support broken, forcing max_power
[  +0.006174] ata1.00: LPM support broken, forcing max_power
[  +0.000046] ata1.00: configured for UDMA/133
[  +0.000016] sd 0:0:0:0: [sda] tag#24 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE cmd_age=2s
[  +0.000003] sd 0:0:0:0: [sda] tag#24 Sense Key : Medium Error [current]
[  +0.000003] sd 0:0:0:0: [sda] tag#24 Add. Sense: Unrecovered read error - auto reallocate failed
[  +0.000003] sd 0:0:0:0: [sda] tag#24 CDB: Read(10) 28 00 6b 32 a0 00 00 00 08 00
[  +0.000003] blk_update_request: I/O error, dev sda, sector 1798479872 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[  +0.000005] Buffer I/O error on dev sda13, logical block 0, async page read
[  +0.000018] ata1: EH complete
[  +2.270220] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[  +0.000003] ata1.00: irq_stat 0x40000001
[  +0.000004] ata1.00: failed command: READ DMA EXT
[  +0.000005] ata1.00: cmd 25/00:02:02:a0:32/00:00:6b:00:00/e0 tag 31 dma 1024 in
                       res 51/40:02:02:a0:32/00:00:6b:00:00/e0 Emask 0x9 (media error)
[  +0.000001] ata1.00: status: { DRDY ERR }
[  +0.000002] ata1.00: error: { UNC }
[  +0.108707] ata1.00: LPM support broken, forcing max_power
[  +0.006245] ata1.00: LPM support broken, forcing max_power
[  +0.000078] ata1.00: configured for UDMA/133
[  +0.000031] sd 0:0:0:0: [sda] tag#31 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE cmd_age=2s
[  +0.000007] sd 0:0:0:0: [sda] tag#31 Sense Key : Medium Error [current]
[  +0.000005] sd 0:0:0:0: [sda] tag#31 Add. Sense: Unrecovered read error - auto reallocate failed
[  +0.000005] sd 0:0:0:0: [sda] tag#31 CDB: Read(10) 28 00 6b 32 a0 02 00 00 02 00
[  +0.000007] blk_update_request: I/O error, dev sda, sector 1798479874 op 0x0:(READ) flags 0x1000 phys_seg 1 prio class 0
[  +0.000040] ata1: EH complete
[  +0.000037] EXT4-fs (sda13): unable to read superblock