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  1. I had kernel 5.4 installed at first. I turned down the freq until 1400 without any success. With kernel 4.4 i did not notice the problem anymore . . .
  2. Hi, First, I use a mean well S-100F-12 (12 Volt 8.5 A) https://www.meanwell-web.com/nl-nl/ac-dc-enclosed-power-supply-output-12vdc-at-8-5a-s--100f--12 This one I had some time and I wasn't using it. I power the NanoPi true the 4-pin connector on the sata hat with a connector used from an old PC power supply. (All 4 wires connected) I had some spare time this week-end and did some test with my NanoPi. The problem seems to be more noticeable when I use midnight commander and copy files from usb to the sata hat. It also shows up when copying files from network to sata true a samba share on the NanoPi. Slowing down the CPU to 1800 ,1600 and 1400 did not make a difference. Temperature found with htop was approx. 42-40°C at max CPU and at 1600 - 1400 about 36°C I have a large slow turning fan on the NanoPi and a 50mm direct above the sata hat. What I found strange is, that when I started from a cooled down NanoPi the NanoPi worked longer before failing than when is just rebooted and started again. (Or it is my imagination :-)) After another tip on https://forum.openmediavault.org/index.php/Thread/30512-Nanopi-crashes-on-file-transfers/ I restarted and used kernel 4.4. The CPU is now running at 1800 with a temp of 30 a 35°C and I don’t seem to have this problem anymore. At this point I'm not sure it's a power problem or a temperature problem but I'm planning to spend some more time on it this weekend. There is also still a possibility that I received a faulty NanoPi or hat . . . Any further input about this is always welcome.
  3. I've seem to have the same when copying data. I was using a sata had with an hdd and a usb3 disk. When copying files it fails. Since I'm new to this any help to get this resolved is welcome. --> Linux nanopim4v2 5.4.7-rockchip64 #19.11.5 SMP PREEMPT Wed Jan 1 09:39:17 CET 2020 aarch64 GNU/Linux Log that I found Jan 17 12:54:19 nanopim4v2 kernel: [21912.080372] Modules linked in: hci_uart bluetooth cpufreq_userspace zstd zram dw_hdmi_i2s_audio rockchip_rga brcmfmac brcmutil v4l2_mem2mem videobuf2_dma_sg videobuf2_memops videobuf2_v4l2 videobuf2_common cfg80211 videodev rfkill fusb302 mc tcpm typec panfrost gpu_sched rockchipdrm analogix_dp dw_mipi_dsi dw_hdmi ip_tables ipv6 crc_ccitt uas raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx raid1 raid0 multipath linear md_mod phy_rockchip_typec phy_rockchip_pcie dwmac_rk stmmac_platform stmmac phylink Jan 17 12:54:19 nanopim4v2 kernel: [21912.088969] CPU: 5 PID: 273 Comm: kswapd0 Not tainted 5.4.7-rockchip64 #19.11.5 Jan 17 12:54:19 nanopim4v2 kernel: [21912.091123] Hardware name: FriendlyElec NanoPi M4 Ver2.0 (DT) Jan 17 12:54:19 nanopim4v2 kernel: [21912.093184] pstate: 40000005 (nZcv daif -PAN -UAO) Jan 17 12:54:19 nanopim4v2 kernel: [21912.095088] pc : __call_rcu+0x2c/0x1c0 Jan 17 12:54:19 nanopim4v2 kernel: [21912.096945] lr : call_rcu+0x10/0x18 Jan 17 12:54:19 nanopim4v2 kernel: [21912.098769] sp : ffff800011e9b8c0 Jan 17 12:54:19 nanopim4v2 kernel: [21912.100562] x29: ffff800011e9b8c0 x28: 00000000000000b2 Jan 17 12:54:19 nanopim4v2 kernel: [21912.102569] x27: ffff0000ee567c40 x26: 0000000000000000 Jan 17 12:54:19 nanopim4v2 kernel: [21912.104553] x25: 0000000000000000 x24: 0000000000000000 Jan 17 12:54:19 nanopim4v2 kernel: [21912.106518] x23: ffff8000105d8618 x22: ffff0000ed9ac1d8 Jan 17 12:54:19 nanopim4v2 kernel: [21912.108482] x21: ffff800010dbfe60 x20: 0000000080000000 Jan 17 12:54:19 nanopim4v2 kernel: [21912.110455] x19: 0000000000000000 x18: 0000000000000001 Jan 17 12:54:19 nanopim4v2 kernel: [21912.112396] x17: 0000000000000000 x16: 0000000000000000 Jan 17 12:54:19 nanopim4v2 kernel: [21912.114370] x15: ffffffffffffffff x14: ffff80001135b508 Jan 17 12:54:19 nanopim4v2 kernel: [21912.116348] x13: fffffe0002d60540 x12: 0000000000000001 Jan 17 12:54:19 nanopim4v2 kernel: [21912.118310] x11: 0000000000000000 x10: 00000000000009d0 Jan 17 12:54:19 nanopim4v2 kernel: [21912.120259] x9 : ffff800011e9b8f0 x8 : 0000000000000000 Jan 17 12:54:19 nanopim4v2 kernel: [21912.122214] x7 : 0000000000000001 x6 : 0000000000000000 Jan 17 12:54:19 nanopim4v2 kernel: [21912.124095] x5 : 0000000000000001 x4 : ffff0000ee567800 Jan 17 12:54:19 nanopim4v2 kernel: [21912.125973] x3 : ffff0000edb70c70 x2 : 0000000000000000 Jan 17 12:54:19 nanopim4v2 kernel: [21912.127822] x1 : ffff8000105d8618 x0 : 0000000080000000 Jan 17 12:54:19 nanopim4v2 kernel: [21912.129690] Call trace: Jan 17 12:54:19 nanopim4v2 kernel: [21912.131269] __call_rcu+0x2c/0x1c0 Jan 17 12:54:19 nanopim4v2 kernel: [21912.132934] call_rcu+0x10/0x18 Jan 17 12:54:19 nanopim4v2 kernel: [21912.134582] security_inode_free+0x48/0x58 Jan 17 12:54:19 nanopim4v2 kernel: [21912.136306] __destroy_inode+0xb0/0x218 Jan 17 12:54:19 nanopim4v2 kernel: [21912.138016] destroy_inode+0x2c/0x70 Jan 17 12:54:19 nanopim4v2 kernel: [21912.139725] evict+0x104/0x168 Jan 17 12:54:19 nanopim4v2 kernel: [21912.141386] iput+0xd8/0x190 Jan 17 12:54:19 nanopim4v2 kernel: [21912.143010] dentry_unlink_inode+0x114/0x160 Jan 17 12:54:19 nanopim4v2 kernel: [21912.144727] __dentry_kill+0xc0/0x1c0 Jan 17 12:54:19 nanopim4v2 kernel: [21912.146396] shrink_dentry_list+0x7c/0xd8 Jan 17 12:54:19 nanopim4v2 kernel: [21912.148088] prune_dcache_sb+0x5c/0x88 Jan 17 12:54:19 nanopim4v2 kernel: [21912.149767] super_cache_scan+0xcc/0x160 Jan 17 12:54:19 nanopim4v2 kernel: [21912.151433] do_shrink_slab+0x134/0x248 Jan 17 12:54:19 nanopim4v2 kernel: [21912.153082] shrink_slab+0xb4/0x2a8 Jan 17 12:54:19 nanopim4v2 kernel: [21912.154701] shrink_node+0xc0/0x468 Jan 17 12:54:19 nanopim4v2 kernel: [21912.156292] balance_pgdat+0x2c8/0x540 Jan 17 12:54:19 nanopim4v2 kernel: [21912.157926] kswapd+0x1c4/0x370 Jan 17 12:54:19 nanopim4v2 kernel: [21912.159511] kthread+0x120/0x128 Jan 17 12:54:19 nanopim4v2 kernel: [21912.161065] ret_from_fork+0x10/0x18 Jan 17 12:54:19 nanopim4v2 kernel: [21912.164486] ---[ end trace 04aebd1132e57ca5 ]--- root@nanopim4v2:~# ~~~