I have installed openwrt 19.07.7 on RB2011UiAS-2HnD-IN rev3 and I have got a lot ECC errors during installation proccess.
OpenWrt 19.07.7, r11306-c4a6851c72
root@OpenWrt:/# sysupgrade -v -n /tmp/openwrt-19.07.7-ar71xx-mikrotik-nand-large-squashfs-sysupgrade.bin
Image metadata not found
Commencing upgrade. Closing all shell sessions.
Watchdog handover: fd=3
- watchdog -
killall: telnetd: no process killed
Sending TERM to remaining processes ... netifd odhcpd uhttpd ntpd dnsmasq ubusd urngd logd rpcd
Sending KILL to remaining processes ...
Performing system upgrade...
Unlocking kernel ...
Erasing kernel ...
Writing data to block 0 at offset 0x0
Writing data to block 1 at offset 0x20000
Writing data to block 2 at offset 0x40000
Writing data to block 3 at offset 0x60000
Writing data to block 4 at offset 0x80000
Writing data to block 5 at offset 0xa0000
Writing data to block 6 at offset 0xc0000
Writing data to block 7 at offset 0xe0000
Writing data to block 8 at offset 0x100000
Writing data to block 9 at offset 0x120000
Writing data to block 10 at offset 0x140000
Writing data to block 11 at offset 0x160000
Writing data to block 12 at offset 0x180000
Writing data to block 13 at offset 0x1a0000
[ 170.713074] ubi0: attaching mtd6
[ 170.717267] __nand_correct_data: uncorrectable ECC error
[ 170.722779] ubi0 warning: 0x802f27f4: error -77 (ECC error) while reading 64 bytes from PEB 0:0, read only 64 bytes, retry
[ 170.734836] __nand_correct_data: uncorrectable ECC error
[ 170.740354] ubi0 warning: 0x802f27f4: error -77 (ECC error) while reading 64 bytes from PEB 0:0, read only 64 bytes, retry
[ 170.752428] __nand_correct_data: uncorrectable ECC error
[ 170.757955] ubi0 warning: 0x802f27f4: error -77 (ECC error) while reading 64 bytes from PEB 0:0, read only 64 bytes, retry
[ 170.769991] __nand_correct_data: uncorrectable ECC error
[ 170.775494] ubi0 error: 0x802f2810: error -77 (ECC error) while reading 64 bytes from PEB 0:0, read 64 bytes
[ 170.785678] CPU: 0 PID: 1857 Comm: ubiattach Not tainted 4.14.221 #0
[ 170.792247] Stack : 86a2b000 800b4cf4 80520000 804d9304 00000000 00000000 00000000 00000000
[ 170.800910] 00000000 00000000 00000000 00000000 00000000 807a0000 8697bc38 de26ee92
[ 170.809564] 8697bcd0 00000000 00000000 00002c30 00000038 80471eb8 00000007 00000000
[ 170.818220] 000000a4 1eb119c3 000000a3 00000000 8697bc18 80000000 00000040 00000000
[ 170.826875] 00000000 00000000 00000000 00000000 00000003 802ace84 00000000 807a0000
[ 170.835518] ...
[ 170.838057] Call Trace:
[ 170.838069] [<800b4cf4>] 0x800b4cf4
[ 170.844189] [<80471eb8>] 0x80471eb8
[ 170.847805] [<802ace84>] 0x802ace84
[ 170.851408] [<8006c4cc>] 0x8006c4cc
[ 170.855010] [<8006c4d4>] 0x8006c4d4
[ 170.858627] [<802f2818>] 0x802f2818
[ 170.862236] [<802f2b94>] 0x802f2b94
[ 170.865847] [<802f251c>] 0x802f251c
[ 170.869454] [<802f7d1c>] 0x802f7d1c
[ 170.873055] [<802ec688>] 0x802ec688
[ 170.876670] [<801500f0>] 0x801500f0
[ 170.880279] [<8012cb64>] 0x8012cb64
[ 170.883878] [<802f928c>] 0x802f928c
[ 170.887496] [<802ec6a0>] 0x802ec6a0
[ 170.891104] [<802ed834>] 0x802ed834
[ 170.894739] [<80186f40>] 0x80186f40
[ 170.898355] [<801552ac>] 0x801552ac
[ 170.901961] [<801601a0>] 0x801601a0
[ 170.905571] [<8013d73c>] 0x8013d73c
[ 170.909195] [<80186f40>] 0x80186f40
[ 170.912802] [<80155398>] 0x80155398
[ 170.916421] [<8007174c>] 0x8007174c
[ 170.920025] [<80186f40>] 0x80186f40
[ 170.923629]
[ 170.945887] __nand_correct_data: uncorrectable ECC error
[ 170.951391] ubi0 warning: 0x802f27f4: error -77 (ECC error) while reading 64 bytes from PEB 0:2048, read only 64 bytes, retry
[ 170.963703] __nand_correct_data: uncorrectable ECC error
[ 170.969219] ubi0 warning: 0x802f27f4: error -77 (ECC error) while reading 64 bytes from PEB 0:2048, read only 64 bytes, retry
[ 170.981525] __nand_correct_data: uncorrectable ECC error
[ 170.987049] ubi0 warning: 0x802f27f4: error -77 (ECC error) while reading 64 bytes from PEB 0:2048, read only 64 bytes, retry
[ 170.999356] __nand_correct_data: uncorrectable ECC error
[ 171.004860] ubi0 error: 0x802f2810: error -77 (ECC error) while reading 64 bytes from PEB 0:2048, read 64 bytes
[ 171.015302] CPU: 0 PID: 1857 Comm: ubiattach Not tainted 4.14.221 #0
[ 171.021869] Stack : 86a2a800 800b4cf4 80520000 804d9304 00000000 00000000 00000000 00000000
[ 171.030533] 00000000 00000000 00000000 00000000 00000000 807a0000 8697bc38 de26ee92
[ 171.039190] 8697bcd0 00000000 00000000 00003550 00000038 80471eb8 00000007 00000000
[ 171.047847] 000000cc 1a7d63a2 000000cb 00000000 8697bc18 80000000 00000040 00000000
[ 171.056505] 00000000 00000800 00000800 00000000 00000003 802ace84 00000000 807a0000
[ 171.065153] ...
[ 222.472533] Call Trace:
[ 222.472543] [<800b4cf4>] 0x800b4cf4
[ 222.478687] [<80471eb8>] 0x80471eb8
[ 222.482289] [<802ace84>] 0x802ace84
[ 222.485904] [<8006c4cc>] 0x8006c4cc
[ 222.489508] [<8006c4d4>] 0x8006c4d4
[ 222.493110] [<802f2818>] 0x802f2818
[ 222.496731] [<802f2dc4>] 0x802f2dc4
[ 222.500333] [<802f251c>] 0x802f251c
[ 222.503935] [<802f7ef8>] 0x802f7ef8
[ 222.507552] [<801500f0>] 0x801500f0
[ 222.511158] [<802f928c>] 0x802f928c
[ 222.514760] [<802ec6a0>] 0x802ec6a0
[ 222.518378] [<802ed834>] 0x802ed834
[ 222.521996] [<80186f40>] 0x80186f40
[ 222.525599] [<801552ac>] 0x801552ac
[ 222.529217] [<801601a0>] 0x801601a0
[ 222.532831] [<8013d73c>] 0x8013d73c
[ 222.536456] [<80186f40>] 0x80186f40
[ 222.540060] [<80155398>] 0x80155398
[ 222.543664] [<8007174c>] 0x8007174c
[ 222.547281] [<80186f40>] 0x80186f40
[ 222.550888]
[ 223.150530] ubi0: scanning is finished
[ 223.154684] ubi0 error: 0x802e88c4: the layout volume was not found
[ 223.161436] ubi0 error: 0x802ec6c0: failed to attach mtd6, error -22
ubiattach: error!: cannot attach mtd6
error 22 (Invalid argument)
ubiformat: mtd6 [ 223.199008] __nand_correct_data: uncorrectable ECC error
(nand), size 130[ 223.205863] __nand_correct_data: uncorrectable ECC error
023424 bytes (12[ 223.212726] __nand_correct_data: uncorrectable ECC error
4.0 MiB), 992 er[ 223.219702] __nand_correct_data: uncorrectable ECC error
aseblocks of 131072 bytes (128.0 KiB), min. I/O size 2048 bytes[ 223.231156] __nand_correct_data: uncorrectable ECC error
libscan: scann[ 223.237836] __nand_correct_data: uncorrectable ECC error
ing eraseblock 0[ 223.244722] __nand_correct_data: uncorrectable ECC error
-- 0 % complet[ 223.251676] __nand_correct_data: uncorrectable ECC error
e
.
.
.
.
libscan: scanning eraseblock 991 -- 100 % complete
ubiformat: 866 eraseblocks are supposedly empty
ubiformat: warning!: 126 of 992 eraseblocks contain non-UBI data
ubiformat: warning!: only 0 of 992 eraseblocks have valid erase counter
ubiformat: erase counter 0 will be used for all eraseblocks
ubiformat: note, arbitrary erase counter value may be specified using -e option
ubiformat: use erase counter 0 for all eraseblocks
ubiformat: formatting eraseblock 0 -- 0 % complete
.
.
.
.
ubiformat: formatting eraseblock 991 -- 100 % complete
[ 234.784969] ubi0: scanning is finished
[ 234.811099] ubi0: attached mtd6 (name "ubi", size 124 MiB)
[ 234.816826] ubi0: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes
[ 234.823927] ubi0: min./max. I/O unit sizes: 2048/2048, sub-page size 2048
[ 234.830958] ubi0: VID header offset: 2048 (aligned 2048), data offset: 4096
[ 234.838160] ubi0: good PEBs: 992, bad PEBs: 0, corrupted PEBs: 0
[ 234.844365] ubi0: user volume: 0, internal volumes: 1, max. volumes count: 128
[ 234.851835] ubi0: max/mean erase counter: 0/0, WL threshold: 4096, image sequence number: 170016669
[ 234.861186] ubi0: available PEBs: 968, total reserved PEBs: 24, PEBs reserved for bad PEB handling: 20
[ 234.870991] ubi0: background thread "ubi_bgt0d" started, PID 1867
UBI device number 0, total 992 LEBs (125960192 bytes, 120.1 MiB), available 968 LEBs (122912768 bytes, 117.2 MiB), LEB size 126976 bytes (124.0 KiB)
Volume ID 0, size 14 LEBs (1777664 bytes, 1.6 MiB), LEB size 126976 bytes (124.0 KiB), dynamic, name "none", alignment 1
Volume ID 1, size 21 LEBs (2666496 bytes, 2.5 MiB), LEB size 126976 bytes (124.0 KiB), dynamic, name "rootfs", alignment 1
Set volume size to 118468608
Volume ID 2, size 933 LEBs (118468608 bytes, 112.9 MiB), LEB size 126976 bytes (124.0 KiB), dynamic, name "rootfs_data", alignment 1
sysupgrade successful
umount: can't unmount /dev: Resource busy
umount: can't unmount /tmp: Resource busy
umount: can't unmount /: Invalid argument
[ 236.791008] Removing MTD device #1 (hard_config) with use count 1
[ 236.798498] reboot: Restarting system
root@OpenWrt:/# cat /proc/cpuinfo
system type : Atheros AR9344 rev 3
machine : Mikrotik RouterBOARD RB2011UiAS-2HnD
processor : 0
cpu model : MIPS 74Kc V4.12
BogoMIPS : 299.82
wait instruction : yes
microsecond timers : yes
tlb_entries : 32
extra interrupt vector : yes
hardware watchpoint : yes, count: 4, address/irw mask: [0x0ffc, 0x0ffc, 0x0ffb, 0x0ffb]
isa : mips1 mips2 mips32r1 mips32r2
ASEs implemented : mips16 dsp dsp2
Options implemented : tlb 4kex 4k_cache prefetch mcheck ejtag llsc dc_aliases perf_cntr_intr_bit nan_legacy nan_2008 perf
shadow register sets : 1
kscratch registers : 0
package : 0
core : 0
VCED exceptions : not available
VCEI exceptions : not available