21:11:52    480M   rootpool/ROOT/default@2019-11-19-13:53:43-0
sdhci_bcm0-slot0: Controller timeout
sdhci_bcm0-slot0: ============== REGISTER DUMP ==============
sdhci_bcm0-slot0: Sys addr: 0x021d4000 | Version:  0x00009902
sdhci_bcm0-slot0: Blk size: 0x00000200 | Blk cnt:  0x00000026
sdhci_bcm0-slot0: Argument: 0x02368028 | Trn mode: 0x00000036
sdhci_bcm0-slot0: Present:  0x01ff0a06 | Host ctl: 0x00000003
sdhci_bcm0-slot0: Power:    0x0000000f | Blk gap:  0x00000000
sdhci_bcm0-slot0: Wake-up:  0x00000000 | Clock:    0x00000207
sdhci_bcm0-slot0: Timeout:  0x0000000e | Int stat: 0x00000021
sdhci_bcm0-slot0: Int enab: 0x01ff00bb | Sig enab: 0x01ff008a
sdhci_bcm0-slot0: AC12 err: 0x00000000 | Host ctl2:0x00000000
sdhci_bcm0-slot0: Caps:     0x00000000 | Caps2:    0x00000000
sdhci_bcm0-slot0: Max curr: 0x00000001 | ADMA err: 0x00000000
sdhci_bcm0-slot0: ADMA addr:0x00000000 | Slot int: 0x00000000
sdhci_bcm0-slot0: ===========================================
mmcsd0: Error indicated: 1 Timeout
mmcsd0: Error indicated: 1 Timeout
sdhci_bcm0-slot0: Got data interrupt 0x00600000, but there is no active command.
sdhci_bcm0-slot0: ============== REGISTER DUMP ==============
sdhci_bcm0-slot0: Sys addr: 0x00000000 | Version:  0x00009902
sdhci_bcm0-slot0: Blk size: 0x00000200 | Blk cnt:  0x00000018
sdhci_bcm0-slot0: Argument: 0x00db4a68 | Trn mode: 0x00000036
sdhci_bcm0-slot0: Present:  0x010f0000 | Host ctl: 0x00000003
sdhci_bcm0-slot0: Power:    0x0000000f | Blk gap:  0x00000000
sdhci_bcm0-slot0: Wake-up:  0x00000000 | Clock:    0x00000207
sdhci_bcm0-slot0: Timeout:  0x0000000e | Int stat: 0x00000000
sdhci_bcm0-slot0: Int enab: 0x01ff00bb | Sig enab: 0x01ff008b
sdhci_bcm0-slot0: AC12 err: 0x00000000 | Host ctl2:0x00000000
sdhci_bcm0-slot0: Caps:     0x00000000 | Caps2:    0x00000000
sdhci_bcm0-slot0: Max curr: 0x00000001 | ADMA err: 0x00000000
sdhci_bcm0-slot0: ADMA addr:0x00000000 | Slot int: 0x00000000
sdhci_bcm0-slot0: ===========================================
mmcsd0: Error indicated: 1 Timeout
mmcsd0: Error indicated: 1 Timeout
mmcsd0: Error indicated: 1 Timeout
sdhci_bcm0-slot0: Got data interrupt 0x00600000, but there is no active command.
sdhci_bcm0-slot0: ============== REGISTER DUMP ==============
sdhci_bcm0-slot0: Sys addr: 0x00000000 | Version:  0x00009902
sdhci_bcm0-slot0: Blk size: 0x00000200 | Blk cnt:  0x00000010
sdhci_bcm0-slot0: Argument: 0x03a19410 | Trn mode: 0x00000036
sdhci_bcm0-slot0: Present:  0x01bf0000 | Host ctl: 0x00000003
sdhci_bcm0-slot0: Power:    0x0000000f | Blk gap:  0x00000000
sdhci_bcm0-slot0: Wake-up:  0x00000000 | Clock:    0x00000207
sdhci_bcm0-slot0: Timeout:  0x0000000e | Int stat: 0x00000000
sdhci_bcm0-slot0: Int enab: 0x01ff00bb | Sig enab: 0x01ff008b
sdhci_bcm0-slot0: AC12 err: 0x00000000 | Host ctl2:0x00000000
sdhci_bcm0-slot0: Caps:     0x00000000 | Caps2:    0x00000000
sdhci_bcm0-slot0: Max curr: 0x00000001 | ADMA err: 0x00000000
sdhci_bcm0-slot0: ADMA addr:0x00000000 | Slot int: 0x00000000
sdhci_bcm0-slot0: ===========================================
sdhci_bcm0-slot0: Got data interrupt 0x00600000, but there is no active command.
sdhci_bcm0-slot0: ============== REGISTER DUMP ==============
sdhci_bcm0-slot0: Sys addr: 0x00000000 | Version:  0x00009902
sdhci_bcm0-slot0: Blk size: 0x00000200 | Blk cnt:  0x00000010
sdhci_bcm0-slot0: Argument: 0x03a19610 | Trn mode: 0x00000036
sdhci_bcm0-slot0: Present:  0x016f0000 | Host ctl: 0x00000002
sdhci_bcm0-slot0: Power:    0x0000000f | Blk gap:  0x00000000
sdhci_bcm0-slot0: Wake-up:  0x00000000 | Clock:    0x00000207
sdhci_bcm0-slot0: Timeout:  0x0000000e | Int stat: 0x00000000
sdhci_bcm0-slot0: Int enab: 0x01ff00bb | Sig enab: 0x01ff008b
sdhci_bcm0-slot0: AC12 err: 0x00000000 | Host ctl2:0x00000000
sdhci_bcm0-slot0: Caps:     0x00000000 | Caps2:    0x00000000
sdhci_bcm0-slot0: Max curr: 0x00000001 | ADMA err: 0x00000000
sdhci_bcm0-slot0: ADMA addr:0x00000000 | Slot int: 0x00000000
sdhci_bcm0-slot0: ===========================================
sdhci_bcm0-slot0: Got data interrupt 0x00600000, but there is no active command.
sdhci_bcm0-slot0: ============== REGISTER DUMP ==============
sdhci_bcm0-slot0: Sys addr: 0x00000000 | Version:  0x00009902
sdhci_bcm0-slot0: Blk size: 0x00000200 | Blk cnt:  0x00000010
sdhci_bcm0-slot0: Argument: 0x00019a10 | Trn mode: 0x00000036
sdhci_bcm0-slot0: Present:  0x015f0000 | Host ctl: 0x00000003
sdhci_bcm0-slot0: Power:    0x0000000f | Blk gap:  0x00000000
sdhci_bcm0-slot0: Wake-up:  0x00000000 | Clock:    0x00000207
sdhci_bcm0-slot0: Timeout:  0x0000000e | Int stat: 0x00000000
sdhci_bcm0-slot0: Int enab: 0x01ff00bb | Sig enab: 0x01ff008b
sdhci_bcm0-slot0: AC12 err: 0x00000000 | Host ctl2:0x00000000
sdhci_bcm0-slot0: Caps:     0x00000000 | Caps2:    0x00000000
sdhci_bcm0-slot0: Max curr: 0x00000001 | ADMA err: 0x00000000
sdhci_bcm0-slot0: ADMA addr:0x00000000 | Slot int: 0x00000000
sdhci_bcm0-slot0: ===========================================
sdhci_bcm0-slot0: Got data interrupt 0x00600000, but there is no active command.
sdhci_bcm0-slot0: ============== REGISTER DUMP ==============
sdhci_bcm0-slot0: Sys addr: 0x00000000 | Version:  0x00009902
sdhci_bcm0-slot0: Blk size: 0x00000200 | Blk cnt:  0x00000020
sdhci_bcm0-slot0: Argument: 0x00a40148 | Trn mode: 0x00000036
sdhci_bcm0-slot0: Present:  0x010f0000 | Host ctl: 0x00000003
sdhci_bcm0-slot0: Power:    0x0000000f | Blk gap:  0x00000000
sdhci_bcm0-slot0: Wake-up:  0x00000000 | Clock:    0x00000207
sdhci_bcm0-slot0: Timeout:  0x0000000e | Int stat: 0x00000000
sdhci_bcm0-slot0: Int enab: 0x01ff00bb | Sig enab: 0x01ff008b
sdhci_bcm0-slot0: AC12 err: 0x00000000 | Host ctl2:0x00000000
sdhci_bcm0-slot0: Caps:     0x00000000 | Caps2:    0x00000000
sdhci_bcm0-slot0: Max curr: 0x00000001 | ADMA err: 0x00000000
sdhci_bcm0-slot0: ADMA addr:0x00000000 | Slot int: 0x00000000
sdhci_bcm0-slot0: ===========================================
480M   rootpool/ROOT/default@2019-11-19-13:53:43-0
21:11:54    481M   rootpool/ROOT/default@2019-11-19-13:53:43-0
21:11:55    484M   rootpool/ROOT/default@2019-11-19-13:53:43-0
21:11:56    486M   rootpool/ROOT/default@2019-11-19-13:53:43-0
mmcsd0: Error indicated: 1 Timeout
mmcsd0: Error indicated: 1 Timeout
mmcsd0: Error indicated: 1 Timeout
sdhci_bcm0-slot0: Got data interrupt 0x00600000, but there is no active command.
sdhci_bcm0-slot0: ============== REGISTER DUMP ==============
sdhci_bcm0-slot0: Sys addr: 0x00000000 | Version:  0x00009902
sdhci_bcm0-slot0: Blk size: 0x00000200 | Blk cnt:  0x00000010
sdhci_bcm0-slot0: Argument: 0x03a19610 | Trn mode: 0x00000036
sdhci_bcm0-slot0: Present:  0x010f0000 | Host ctl: 0x00000003
sdhci_bcm0-slot0: Power:    0x0000000f | Blk gap:  0x00000000
sdhci_bcm0-slot0: Wake-up:  0x00000000 | Clock:    0x00000207
sdhci_bcm0-slot0: Timeout:  0x0000000e | Int stat: 0x00000000
sdhci_bcm0-slot0: Int enab: 0x01ff00bb | Sig enab: 0x01ff008b
sdhci_bcm0-slot0: AC12 err: 0x00000000 | Host ctl2:0x00000000
sdhci_bcm0-slot0: Caps:     0x00000000 | Caps2:    0x00000000
sdhci_bcm0-slot0: Max curr: 0x00000001 | ADMA err: 0x00000000
sdhci_bcm0-slot0: ADMA addr:0x00000000 | Slot int: 0x00000000
sdhci_bcm0-slot0: ===========================================
488M   rootpool/ROOT/defmmcsd0: Error indicated: 1 Timeout
mmcsd0: Error indicated: 1 Timeout
sdhci_bcm0-slot0: Got data interrupt 0x00600000, but there is no active command.
sdhci_bcm0-slot0: ============== REGISTER DUMP ==============
sdhci_bcm0-slot0: Sys addr: 0x00000000 | Version:  0x00009902
sdhci_bcm0-slot0: Blk size: 0x00000200 | Blk cnt:  0x00000004
sdhci_bcm0-slot0: Argument: 0x03a197c1 | Trn mode: 0x00000036
sdhci_bcm0-slot0: Present:  0x01ff0000 | Host ctl: 0x00000003
sdhci_bcm0-slot0: Power:    0x0000000f | Blk gap:  0x00000000
sdhci_bcm0-slot0: Wake-up:  0x00000000 | Clock:    0x00000207
sdhci_bcm0-slot0: Timeout:  0x0000000e | Int stat: 0x00000000
sdhci_bcm0-slot0: Int enab: 0x01ff00bb | Sig enab: 0x01ff008b
ault@2019-11sdhci_bcm0-slot0: AC12 err: 0x00000000 | Host ctl2:0x00000000
sdhci_bcm0-slot0: Caps:     0x00000000 | Caps2:    0x00000000
sdhci_bcm0-slot0: Max curr: 0x00000001 | ADMA err: 0x00000000
sdhci_bcm0-slot0: ADMA addr:0x00000000 | Slot int: 0x00000000
sdhci_bcm0-slot0: ===========================================
-19-13:53:43-0
sdhci_bcm0-slot0: Got data interrupt 0x00600000, but there is no active command.
sdhci_bcm0-slot0: ============== REGISTER DUMP ==============
sdhci_bcm0-slot0: Sys addr: 0x00000000 | Version:  0x00009902
sdhci_bcm0-slot0: Blk size: 0x00000200 | Blk cnt:  0x00000004
sdhci_bcm0-slot0: Argument: 0x03a197c1 | Trn mode: 0x00000036
sdhci_bcm0-slot0: Present:  0x010f0000 | Host ctl: 0x00000002
sdhci_bcm0-slot0: Power:    0x0000000f | Blk gap:  0x00000000
sdhci_bcm0-slot0: Wake-up:  0x00000000 | Clock:    0x00000207
sdhci_bcm0-slot0: Timeout:  0x0000000e | Int stat: 0x00000000
sdhci_bcm0-slot0: Int enab: 0x01ff00bb | Sig enab: 0x01ff008b
sdhci_bcm0-slot0: AC12 err: 0x00000000 | Host ctl2:0x00000000
sdhci_bcm0-slot0: Caps:     0x00000000 | Caps2:    0x00000000
sdhci_bcm0-slot0: Max curr: 0x00000001 | ADMA err: 0x00000000
sdhci_bcm0-slot0: ADMA addr:0x00000000 | Slot int: 0x00000000
sdhci_bcm0-slot0: ===========================================
sdhci_bcm0-slot0: Got data interrupt 0x00600000, but there is no active command.
sdhci_bcm0-slot0: ============== REGISTER DUMP ==============
sdhci_bcm0-slot0: Sys addr: 0x00000000 | Version:  0x00009902
sdhci_bcm0-slot0: Blk size: 0x00000200 | Blk cnt:  0x00000010
sdhci_bcm0-slot0: Argument: 0x00019810 | Trn mode: 0x00000036
sdhci_bcm0-slot0: Present:  0x010f0000 | Host ctl: 0x00000002
sdhci_bcm0-slot0: Power:    0x0000000f | Blk gap:  0x00000000
sdhci_bcm0-slot0: Wake-up:  0x00000000 | Clock:    0x00000207
sdhci_bcm0-slot0: Timeout:  0x0000000e | Int stat: 0x00000000
sdhci_bcm0-slot0: Int enab: 0x01ff00bb | Sig enab: 0x01ff008b
sdhci_bcm0-slot0: AC12 err: 0x00000000 | Host ctl2:0x00000000
sdhci_bcm0-slot0: Caps:     0x00000000 | Caps2:    0x00000000
sdhci_bcm0-slot0: Max curr: 0x00000001 | ADMA err: 0x00000000
sdhci_bcm0-slot0: ADMA addr:0x00000000 | Slot int: 0x00000000
sdhci_bcm0-slot0: ===========================================
21:11:58    489M   rootpool/ROOT/default@2019-11-19-13:53:43-0
21:11:59    489M   rootpool/ROOT/default@2019-11-19-13:53:43-0
...

Continues until command finishes.