Oct 25 10:51:04 X2 kernel: ahcich1: Timeout on slot 21 port 0
Oct 25 10:51:04 X2 kernel: ahcich1: is 00000000 cs 00200000 ss 00000000 rs 00200000 tfd d0 serr 00000000 cmd 0004d517
Oct 25 10:51:04 X2 kernel: (aprobe0:ahcich1:0:0:0): ATA_IDENTIFY. ACB: ec 00 00 00 00 40 00 00 00 00 00 00
Oct 25 10:51:04 X2 kernel: (aprobe0:ahcich1:0:0:0): CAM status: Command timeout
Oct 25 10:51:04 X2 kernel: (aprobe0:ahcich1:0:0:0): Retrying command
Oct 25 10:51:34 X2 kernel: ahcich1: Timeout on slot 23 port 0
Oct 25 10:51:34 X2 kernel: ahcich1: is 00000000 cs 00800000 ss 00000000 rs 00800000 tfd d0 serr 00000000 cmd 0004d717
Oct 25 10:51:34 X2 kernel: (aprobe0:ahcich1:0:0:0): ATA_IDENTIFY. ACB: ec 00 00 00 00 40 00 00 00 00 00 00
Oct 25 10:51:34 X2 kernel: (aprobe0:ahcich1:0:0:0): CAM status: Command timeout
Oct 25 10:51:34 X2 kernel: (aprobe0:ahcich1:0:0:0): Retrying command
Oct 25 10:51:52 X2 kernel: icmp redirect from 194.187.108.13: 195.137.202.4 => 194.187.108.11
Oct 25 10:52:04 X2 kernel: ahcich1: Timeout on slot 25 port 0
Oct 25 10:52:04 X2 kernel: ahcich1: is 00000000 cs 02000000 ss 00000000 rs 02000000 tfd d0 serr 00000000 cmd 0004d917
Oct 25 10:52:04 X2 kernel: (aprobe0:ahcich1:0:0:0): ATA_IDENTIFY. ACB: ec 00 00 00 00 40 00 00 00 00 00 00
Oct 25 10:52:04 X2 kernel: (aprobe0:ahcich1:0:0:0): CAM status: Command timeout
Oct 25 10:52:04 X2 kernel: (aprobe0:ahcich1:0:0:0): Retrying command
Oct 25 10:52:35 X2 kernel: ahcich1: Timeout on slot 27 port 0
Oct 25 10:52:35 X2 kernel: ahcich1: is 00000000 cs 08000000 ss 00000000 rs 08000000 tfd d0 serr 00000000 cmd 0004db17
Oct 25 10:52:35 X2 kernel: (aprobe0:ahcich1:0:0:0): ATA_IDENTIFY. ACB: ec 00 00 00 00 40 00 00 00 00 00 00
Oct 25 10:52:35 X2 kernel: (aprobe0:ahcich1:0:0:0): CAM status: Command timeout
Oct 25 10:52:35 X2 kernel: (aprobe0:ahcich1:0:0:0): Retrying command
Oct 25 10:52:42 X2 kernel: sonewconn: pcb 0xfffff8003d2ef3a0: Listen queue overflow: 151 already in queue awaiting acceptance (5 occurrences)
Oct 25 10:53:05 X2 kernel: ahcich1: Timeout on slot 29 port 0
Oct 25 10:53:05 X2 kernel: ahcich1: is 00000000 cs 20000000 ss 00000000 rs 20000000 tfd d0 serr 00000000 cmd 0004dd17
Oct 25 10:53:05 X2 kernel: (aprobe0:ahcich1:0:0:0): ATA_IDENTIFY. ACB: ec 00 00 00 00 40 00 00 00 00 00 00
Oct 25 10:53:05 X2 kernel: (aprobe0:ahcich1:0:0:0): CAM status: Command timeout
Oct 25 10:53:05 X2 kernel: (aprobe0:ahcich1:0:0:0): Retrying command
Oct 25 10:53:35 X2 kernel: ahcich1: Timeout on slot 31 port 0
vfs.zfs.cache_flush_disable: 1
# pciconf -lvbe ahci0
ahci0@pci0:0:31:2: class=0x010601 card=0x01211462 chip=0x1c028086 rev=0x05 hdr=0x00
vendor = 'Intel Corporation'
device = '6 Series/C200 Series Chipset Family 6 port Desktop SATA AHCI Controller'
class = mass storage
subclass = SATA
bar [10] = type I/O Port, range 32, base 0xf070, size 8, enabled
bar [14] = type I/O Port, range 32, base 0xf060, size 4, enabled
bar [18] = type I/O Port, range 32, base 0xf050, size 8, enabled
bar [1c] = type I/O Port, range 32, base 0xf040, size 4, enabled
bar [20] = type I/O Port, range 32, base 0xf020, size 32, enabled
bar [24] = type Memory, range 32, base 0xf7b02000, size 2048, enabled
hint.ahcich.0.sata_rev=2
hint.ahcich.1.sata_rev=2
hint.ahcich.3.sata_rev=2
hint.ahcich.4.sata_rev=2
hint.ahcich.5.sata_rev=2
dd
without the "bs" parameter instead of mv
made it slow enough.ahci0@pci0:0:23:0: class=0x010601 card=0x224517aa chip=0x9d038086 rev=0x21 hdr=0x00
vendor = 'Intel Corporation'
device = 'Sunrise Point-LP SATA Controller [AHCI mode]
class = mass storage
subclass = SATA