Re: How the bad blocks occured in despite MTD manages the bad blocks

[JH <jupiter.hce@gmail.com>]

On 10/4/19, Steve deRosier <derosier@gmail.com> wrote:
> On Thu, Oct 3, 2019 at 2:26 PM JH <jupiter.hce@gmail.com> wrote:
>>
>> On 10/3/19, Richard Weinberger <richard.weinberger@gmail.com> wrote:
>> > On Thu, Oct 3, 2019 at 1:14 PM JH <jupiter.hce@gmail.com> wrote:
>> >> I was told by hardware engineer, it was broken by bad block problem.
>> >
>> > Did he inspect the filesystem in detail?
>> > If he said so based on the same information you shared with us, it was
>> > pure guesswork.
>>
>> Yep, he did.
>>
>> >> After those lines, the boot stopped in an emergent mode in a prompt to
>> >> suggest to log in by Ctl-D, but that could not work, I was not able to
>> >> log into the file system, nor can I get kernel log. From your
>> >> experience, what could be likely the causes, hardware or software?
>> >
>> > Without logs I cannot say anything, sorry.
>>
>> That's ok, as long as I learned it is not caused by bad blocks, I
>> doubt the software caused meltdown, even the full of file system would
>> not cause the damage if NAND. So, my finger would point to hardware
>> problems.
>>
>
> Don't be so fast - you don't have enough information to determine what
> the problem is. That it is or is not a hardware or a software problem.
> You need real kernel logs from the system to even begin to have a
> clue.  In my experience there's often many things wrong and you're
> only going to figure out what the root cause is by understanding the
> system. "it's not a software problem" and throwing it back over the
> wall to the hardware team is just going to result in them turning
> around and doing the same to you.

You are right, I would not say to the hardware engineer it was the
hardware problem.

> Honestly - it likely is a software problem. Configuration or bug or
> process issue. But fundamentally you don't know because you don't have
> meaningful error messages.

Yeah, that is the problem, I could not access the file system.

> Your error messages should show on the bootup terminal output. If
> you're suppressing the kernel log messages, change it so you can read
> them, boot to failure and scroll back and see what's there.

I did checked the full boot message, could not figure out what could
be causes. Sorry, I attached following lengthy full boot message here
in case if anyone doesn't mind to read it.

U-Boot 2018.03-g4505467374-dirty (Jun 24 2019 - 07:07:18 +0000)

CPU:   Freescale i.MX6ULZ rev1.1 900 MHz (running at 396 MHz)
CPU:   Commercial temperature grade (0C to 95C) at 49C
Reset cause: POR
Model: Freescale i.MX6 ULZ 14x14 EVK Board
Board: MX6ULZ 14x14 EVK
DRAM:  512 MiB
NAND:  256 MiB
MMC:   FSL_SDHC: 0
Loading Environment from NAND... *** Warning - bad CRC, using default
environment

Failed (-5)
No panel detected: default to TFT43AB
Display: TFT43AB (480x272)
Video: LCDIF@0x21c8000 is fused, disable it
In:    serial
Out:   serial
Err:   serial
Net:   No ethernet found.
Normal Boot
Hit any key to stop autoboot:  0
Booting image 1

NAND read: device 0 offset 0x800000, size 0x2000000
 33554432 bytes read: OK

NAND read: device 0 offset 0x600000, size 0x200000
 2097152 bytes read: OK
Kernel image @ 0x80800000 [ 0x000000 - 0x89e1d8 ]
## Flattened Device Tree blob at 83000000
   Booting using the fdt blob at 0x83000000
   Using Device Tree in place at 83000000, end 83008a3b
ft_system_setup for mx6

Starting kernel ...

[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 5.1.0-rc4 (oe-user@oe-host) (gcc version
8.2.0 (GCC)) #1 SMP Fri Jul 19 10:17:53 UTC 2019
[    0.000000] CPU: ARMv7 Processor [410fc075] revision 5 (ARMv7), cr=10c5387d
[    0.000000] CPU: div instructions available: patching division code
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
instruction cache
[    0.000000] OF: fdt: Machine model: Traverse PMU
[    0.000000] earlycon: ec_imx6q0 at MMIO 0x02020000 (options '')
[    0.000000] printk: bootconsole [ec_imx6q0] enabled
[    0.000000] Memory policy: Data cache writealloc
[    0.000000] cma: Reserved 64 MiB at 0x8c000000
[    0.000000] random: get_random_bytes called from
start_kernel+0x88/0x498 with crng_init=0
[    0.000000] percpu: Embedded 18 pages/cpu @(ptrval) s42152 r8192
d23384 u73728
[    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 65024
[    0.000000] Kernel command line: console=ttymxc0,115200 earlycon
init=/init mtdparts=gpmi-nand:4m(boot),2m(ubootenv),2m(dtb),32m(kernel1),32m(kernel2),-(u1
[    0.000000] Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
[    0.000000] Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
[    0.000000] Memory: 167912K/262144K available (11264K kernel code,
957K rwdata, 4016K rodata, 1024K init, 7759K bss, 28696K reserved,
65536K cma-reserved,)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] Running RCU self tests
[    0.000000] rcu: Hierarchical RCU implementation.
[    0.000000] rcu:     RCU event tracing is enabled.
[    0.000000] rcu:     RCU lockdep checking is enabled.
[    0.000000] rcu:     RCU restricting CPUs from NR_CPUS=4 to nr_cpu_ids=1.
[    0.000000] rcu: RCU calculated value of scheduler-enlistment delay
is 10 jiffies.
[    0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1
[    0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[    0.000000] Switching to timer-based delay loop, resolution 41ns
[    0.000020] sched_clock: 32 bits at 24MHz, resolution 41ns, wraps
every 89478484971ns
[    0.007841] clocksource: mxc_timer1: mask: 0xffffffff max_cycles:
0xffffffff, max_idle_ns: 79635851949 ns
[    0.020743] Console: colour dummy device 80x30
[    0.022433] Lock dependency validator: Copyright (c) 2006 Red Hat,
Inc., Ingo Molnar
[    0.030976] ... MAX_LOCKDEP_SUBCLASSES:  8
[    0.034255] ... MAX_LOCK_DEPTH:          48
[    0.038432] ... MAX_LOCKDEP_KEYS:        8191
[    0.042878] ... CLASSHASH_SIZE:          4096
[    0.047130] ... MAX_LOCKDEP_ENTRIES:     32768
[    0.051568] ... MAX_LOCKDEP_CHAINS:      65536
[    0.056080] ... CHAINHASH_SIZE:          32768
[    0.060443]  memory used by lock dependency info: 5243 kB
[    0.065836]  per task-struct memory footprint: 1536 bytes
[    0.071454] Calibrating delay loop (skipped), value calculated
using timer frequency.. 48.00 BogoMIPS (lpj=240000)
[    0.081683] pid_max: default: 32768 minimum: 301
[    0.087076] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.092944] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.105333] *** VALIDATE proc ***
[    0.107415] *** VALIDATE cgroup1 ***
[    0.109429] *** VALIDATE cgroup2 ***
[    0.113008] CPU: Testing write buffer coherency: ok
[    0.120820] /cpus/cpu@0 missing clock-frequency property
[    0.123533] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[    0.134792] Setting up static identity map for 0x80100000 - 0x80100078
[    0.139896] rcu: Hierarchical SRCU implementation.
[    0.147572] smp: Bringing up secondary CPUs ...
[    0.149311] smp: Brought up 1 node, 1 CPU
[    0.153304] SMP: Total of 1 processors activated (48.00 BogoMIPS).
[    0.159652] CPU: All CPU(s) started in SVC mode.
[    0.171440] devtmpfs: initialized
[    0.209634] VFP support v0.3: implementor 41 architecture 2 part 30
variant 7 rev 5
[    0.216702] clocksource: jiffies: mask: 0xffffffff max_cycles:
0xffffffff, max_idle_ns: 19112604462750000 ns
[    0.224550] futex hash table entries: 256 (order: 2, 16384 bytes)
[    0.236652] pinctrl core: initialized pinctrl subsystem
[    0.251598] NET: Registered protocol family 16
[    0.312381] DMA: preallocated 256 KiB pool for atomic coherent allocations
[    0.324702] cpuidle: using governor menu
[    0.360531] vdd3p0: supplied by regulator-dummy
[    0.366441] cpu: supplied by regulator-dummy
[    0.371887] vddsoc: supplied by regulator-dummy
[    0.417888] No ATAGs?
[    0.418592] hw-breakpoint: found 5 (+1 reserved) breakpoint and 4
watchpoint registers.
[    0.426407] hw-breakpoint: maximum watchpoint size is 8 bytes.
[    0.441233] imx6ul-pinctrl 20e0000.iomuxc: initialized IMX pinctrl driver
[    0.447210] imx6ul-pinctrl 2290000.iomuxc-snvs: no groups defined
in /soc/aips-bus@2200000/iomuxc-snvs@2290000
[    0.455241] imx6ul-pinctrl 2290000.iomuxc-snvs: initialized IMX
pinctrl driver
[    0.605091] mxs-dma 1804000.dma-apbh: initialized
[    0.617322] vgaarb: loaded
[    0.620125] SCSI subsystem initialized
[    0.624426] usbcore: registered new interface driver usbfs
[    0.628041] usbcore: registered new interface driver hub
[    0.632923] usbcore: registered new device driver usb
[    0.640600] media: Linux media interface: v0.10
[    0.642570] videodev: Linux video capture interface: v2.00
[    0.649142] pps_core: LinuxPPS API ver. 1 registered
[    0.652766] pps_core: Software ver. 5.3.6 - Copyright 2005-2007
Rodolfo Giometti <giometti@linux.it>
[    0.662184] PTP clock support registered
[    0.668159] Advanced Linux Sound Architecture Driver Initialized.
[    0.678663] Bluetooth: Core ver 2.22
[    0.679715] NET: Registered protocol family 31
[    0.684068] Bluetooth: HCI device and connection manager initialized
[    0.690490] Bluetooth: HCI socket layer initialized
[    0.695286] Bluetooth: L2CAP socket layer initialized
[    0.700475] Bluetooth: SCO socket layer initialized
[    0.711109] clocksource: Switched to clocksource mxc_timer1
[    2.186322] VFS: Disk quotas dquot_6.6.0
[    2.187802] VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[    2.263331] NET: Registered protocol family 2
[    2.270257] tcp_listen_portaddr_hash hash table entries: 128
(order: 0, 5120 bytes)
[    2.275687] TCP established hash table entries: 2048 (order: 1, 8192 bytes)
[    2.282595] TCP bind hash table entries: 2048 (order: 4, 73728 bytes)
[    2.289082] TCP: Hash tables configured (established 2048 bind 2048)
[    2.296310] UDP hash table entries: 256 (order: 2, 20480 bytes)
[    2.301214] UDP-Lite hash table entries: 256 (order: 2, 20480 bytes)
[    2.308146] NET: Registered protocol family 1
[    2.317247] RPC: Registered named UNIX socket transport module.
[    2.320541] RPC: Registered udp transport module.
[    2.325450] RPC: Registered tcp transport module.
[    2.329916] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    2.345957] hw perfevents: enabled with armv7_cortex_a7 PMU driver,
5 counters available
[    2.362619] Initialise system trusted keyrings
[    2.366106] workingset: timestamp_bits=30 max_order=16 bucket_order=0
[    2.419270] NFS: Registering the id_resolver key type
[    2.422320] Key type id_resolver registered
[    2.425730] Key type id_legacy registered
[    2.430121] jffs2: version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
[    2.439454] fuse init (API version 7.29)
[    2.535396] Key type asymmetric registered
[    2.537020] Asymmetric key parser 'x509' registered
[    2.543723] io scheduler mq-deadline registered
[    2.546097] io scheduler kyber registered
[    2.573333] imx-sdma 20ec000.sdma: Direct firmware load for
imx/sdma/sdma-imx6q.bin failed with error -2
[    2.580243] imx-sdma 20ec000.sdma: Falling back to syfs fallback
for: imx/sdma/sdma-imx6q.bin
[    2.619406] printk: console [ttymxc0] enabled
[    2.624297] printk: bootconsole [ec_imx6q0] disabled
[    2.631542] random: fast init done
[    2.643677] 21e8000.serial: ttymxc1 at MMIO 0x21e8000 (irq = 50,
base_baud = 5000000) is a IMX
[    2.657514] 21f0000.serial: ttymxc3 at MMIO 0x21f0000 (irq = 51,
base_baud = 5000000) is a IMX
[    2.764057] brd: module loaded
[    2.833811] loop: module loaded
[    2.879822] nand: device found, Manufacturer ID: 0xef, Chip ID: 0xda
[    2.886527] nand: Winbond W29N02GV
[    2.890038] nand: 256 MiB, SLC, erase size: 128 KiB, page size:
2048, OOB size: 64
[    2.903981] Bad block table found at page 131008, version 0x01
[    2.910824] Bad block table found at page 130944, version 0x01
[    2.918440] 6 cmdlinepart partitions found on MTD device gpmi-nand
[    2.924934] Creating 6 MTD partitions on "gpmi-nand":
[    2.930120] 0x000000000000-0x000000400000 : "boot"
[    2.956533] 0x000000400000-0x000000600000 : "ubootenv"
[    2.974802] 0x000000600000-0x000000800000 : "dtb"
[    2.992638] 0x000000800000-0x000002800000 : "kernel1"
[    3.050303] 0x000002800000-0x000004800000 : "kernel2"
[    3.108184] 0x000004800000-0x000010000000 : "ubi"
[    3.366580] gpmi-nand 1806000.gpmi-nand: driver registered.
[    3.380236] libphy: Fixed MDIO Bus: probed
[    3.388114] CAN device driver interface
[    3.397695] usbcore: registered new interface driver r8152
[    3.403745] usbcore: registered new interface driver lan78xx
[    3.409823] usbcore: registered new interface driver asix
[    3.415759] usbcore: registered new interface driver ax88179_178a
[    3.422359] usbcore: registered new interface driver cdc_ether
[    3.428613] usbcore: registered new interface driver smsc95xx
[    3.434851] usbcore: registered new interface driver net1080
[    3.440999] usbcore: registered new interface driver cdc_subset
[    3.447258] usbcore: registered new interface driver zaurus
[    3.453357] usbcore: registered new interface driver MOSCHIP
usb-ethernet driver
[    3.461380] usbcore: registered new interface driver cdc_ncm
[    3.467368] usbcore: registered new interface driver qmi_wwan
[    3.473369] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    3.479995] ehci-pci: EHCI PCI platform driver
[    3.484901] ehci-mxc: Freescale On-Chip EHCI Host driver
[    3.492047] usbcore: registered new interface driver cdc_wdm
[    3.498155] usbcore: registered new interface driver usb-storage
[    3.510549] imx_usb 2184000.usb: No over current polarity defined
[    3.707122] imx_usb 2184200.usb: 2184200.usb supply vbus not found,
using dummy regulator
[    3.722611] ci_hdrc ci_hdrc.1: EHCI Host Controller
[    3.728546] ci_hdrc ci_hdrc.1: new USB bus registered, assigned bus number 1
[    3.761274] ci_hdrc ci_hdrc.1: USB 2.0 started, EHCI 1.00
[    3.770155] usb usb1: New USB device found, idVendor=1d6b,
idProduct=0002, bcdDevice= 5.01
[    3.779159] usb usb1: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[    3.786644] usb usb1: Product: EHCI Host Controller
[    3.791769] usb usb1: Manufacturer: Linux 5.1.0-rc4 ehci_hcd
[    3.797537] usb usb1: SerialNumber: ci_hdrc.1
[    3.811992] hub 1-0:1.0: USB hub found
[    3.816554] hub 1-0:1.0: 1 port detected
[    3.838398] input: 20cc000.snvs:snvs-powerkey as
/devices/soc0/soc/2000000.aips-bus/20cc000.snvs/20cc000.snvs:snvs-powerkey/input/input0
[    3.867744] snvs_rtc 20cc000.snvs:snvs-rtc-lp: registered as rtc0
[    3.875054] i2c /dev entries driver
[    3.895722] imx2-wdt 20bc000.wdog: timeout 60 sec (nowayout=0)
[    3.903370] Bluetooth: HCI UART driver ver 2.3
[    3.907940] Bluetooth: HCI UART protocol H4 registered
[    3.913554] Bluetooth: HCI UART protocol LL registered
[    3.921954] sdhci: Secure Digital Host Controller Interface driver
[    3.928249] sdhci: Copyright(c) Pierre Ossman
[    3.933587] sdhci-pltfm: SDHCI platform and OF driver helper
[    3.992450] mmc0: SDHCI controller on 2190000.usdhc [2190000.usdhc]
using ADMA
[    4.028277] usbcore: registered new interface driver usbhid
[    4.034359] usbhid: USB HID core driver
[    4.096782] NET: Registered protocol family 10
[    4.122741] Segment Routing with IPv6
[    4.127141] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
[    4.145670] NET: Registered protocol family 17
[    4.150322] can: controller area network core (rev 20170425 abi 9)
[    4.181595] NET: Registered protocol family 29
[    4.186185] can: raw protocol (rev 20170425)
[    4.191093] can: broadcast manager protocol (rev 20170425 t)
[    4.204443] mmc0: Tuning failed, falling back to fixed sampling clock
[    4.211646] can: netlink gateway (rev 20170425) max_hops=1
[    4.218423] Key type dns_resolver registered
[    4.251192] cpu cpu0: failed to disable 696MHz OPP
[    4.269933] mmc0: new ultra high speed SDR104 SDIO card at address 0001
[    4.281074] Registering SWP/SWPB emulation handler
[    4.295017] Loading compiled-in X.509 certificates
[    4.401264] imx_thermal tempmon: Commercial CPU temperature grade -
max:95C critical:90C passive:85C
[    4.414659] ubi0: default fastmap pool size: 70
[    4.419399] ubi0: default fastmap WL pool size: 35
[    4.424414] ubi0: attaching mtd5
[    5.741419] ubi0: scanning is finished
[    5.765232] ubi0: attached mtd5 (name "ubi", size 184 MiB)
[    5.770786] ubi0: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes
[    5.777904] ubi0: min./max. I/O unit sizes: 2048/2048, sub-page size 2048
[    5.784831] ubi0: VID header offset: 2048 (aligned 2048), data offset: 4096
[    5.791912] ubi0: good PEBs: 1468, bad PEBs: 4, corrupted PEBs: 0
[    5.798050] ubi0: user volume: 1, internal volumes: 1, max. volumes
count: 128
[    5.805390] ubi0: max/mean erase counter: 18/6, WL threshold: 4096,
image sequence number: 1971059169
[    5.814721] ubi0: available PEBs: 104, total reserved PEBs: 1364,
PEBs reserved for bad PEB handling: 36
[    5.825275] ubi0: background thread "ubi_bgt0d" started, PID 109
[    5.833109] snvs_rtc 20cc000.snvs:snvs-rtc-lp: setting system clock
to 1970-01-01T00:00:01 UTC (1)
[    5.842699] cfg80211: Loading compiled-in X.509 certificates for
regulatory database
[    5.858035] cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
[    5.867119] platform regulatory.0: Direct firmware load for
regulatory.db failed with error -2
[    5.876069] platform regulatory.0: Falling back to syfs fallback
for: regulatory.db
[    5.884070] ALSA device list:
[    5.887081]   No soundcards found.
[    5.898591] UBIFS (ubi0:0): Mounting in unauthenticated mode
[    5.906283] UBIFS (ubi0:0): background thread "ubifs_bgt0_0" started, PID 115
[    5.933292] random: crng init done
[    6.021577] UBIFS (ubi0:0): UBIFS: mounted UBI device 0, volume 0,
name "rootfs_data"
[    6.029462] UBIFS (ubi0:0): LEB size: 126976 bytes (124 KiB),
min./max. I/O unit sizes: 2048 bytes/2048 bytes
[    6.039536] UBIFS (ubi0:0): FS size: 166338560 bytes (158 MiB, 1310
LEBs), journal size 8380416 bytes (7 MiB, 66 LEBs)
[    6.050394] UBIFS (ubi0:0): reserved for root: 4952683 bytes (4836 KiB)
[    6.057136] UBIFS (ubi0:0): media format: w4/r0 (latest is w5/r0),
UUID E9F1667C-8AC1-4030-BB1A-9C5341482A61, small LPT model
[    6.074491] VFS: Mounted root (ubifs filesystem) on device 0:13.
[    6.085038] devtmpfs: mounted
[    6.090385] Freeing unused kernel memory: 1024K
[    6.096157] Run /init as init process
[    6.622933] systemd[1]: System time before build time, advancing clock.
[    6.773833] systemd[1]: systemd 239 running in system mode. (-PAM
-AUDIT -SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP -LIBCRYPTSETUP
-GCRYPT -GNUTLS +AC)
[    6.799488] systemd[1]: Detected architecture arm.

Welcome to OpenEmbedded nodistro.0!

[    6.880787] systemd[1]: Set hostname to <solar>.
[    7.619506] systemd[1]: File
/lib/systemd/system/systemd-journald.service:36 configures an IP
firewall (IPAddressDeny=any), but the local system does not .
[    7.638096] systemd[1]: Proceeding WITHOUT firewalling in effect!
(This warning is only shown for the first loaded unit using IP
firewalling.)
[    8.206122] systemd[1]: sasolar.service: Found ordering cycle on
multi-user.target/start
[    8.214677] systemd[1]: sasolar.service: Found dependency on
sacronjob.service/start
[    8.222958] systemd[1]: sasolar.service: Found dependency on
sasolar.service/stop
[    8.230508] systemd[1]: sasolar.service: Job
sacronjob.service/start deleted to break ordering cycle starting with
sasolar.service/stop
[ SKIP ] Ordering cycle found, skipping SA third run cron job
[    8.318161] systemd[1]: Reached target Swap.
[  OK  ] Reached target Swap.
[  OK  ] Started Dispatch Password Requests to Console Directory Watch.
[  OK  ] Listening on udev Kernel Socket.
[  OK  ] Created slice system-serial\x2dgetty.slice.
[  OK  ] Reached target Remote File Systems.
[  OK  ] Listening on Journal Socket.
         Mounting Kernel Debug File System...
         Starting Apply Kernel Variables...
         Mounting FUSE Control File System...
[    8.732692] systemd[126]: sys-kernel-debug.mount: Failed to execute
command: No such file or directory
[    8.742715] systemd[128]: sys-fs-fuse-connections.mount: Failed to
execute command: No such file or directory
         Mounting Temporary Directory (/tmp)...
[    8.760386] systemd[129]: tmp.mount: Failed to execute command: No
such file or directory
[  OK  ] Listening on udev Control Socket.
         Starting udev Coldplug all Devices...
[    8.830664] systemd[130]: systemd-udev-trigger.service: Failed to
execute command: No such file or directory
[  OK  ] Reached target Host and Network Name Lookups.
         Starting Remount Root and Kernel File Systems...
[  OK  ] Started Forward Password Requests to Wall Directory Watch.
[  OK  ] Reached target Paths.
[  OK  ] Created slice User and Session Slice.
[  OK  ] Created slice system-getty.slice.
[  OK  ] Listening on Network Service Netlink Socket.
[  OK  ] Listening on Journal Socket (/dev/log).
         Starting Journal Service...
[  OK  ] Reached target Slices.
[  OK  ] Listening on initctl Compatibility Named Pipe.
[FAILED] Failed to mount Kernel Debug File System.
See 'systemctl status sys-kernel-debug.mount' for details.
[  OK  ] Started Apply Kernel Variables.
[FAILED] Failed to mount FUSE Control File System.
See 'systemctl status sys-fs-fuse-connections.mount' for details.
[FAILED] Failed to mount Temporary Directory (/tmp).
See 'systemctl status tmp.mount' for details.
[DEPEND] Dependency failed for Network Service.
[DEPEND] Dependency failed for Network Time Synchronization.
[  OK  ] Started Journal Service.
[FAILED] Failed to start udev Coldplug all Devices.
See 'systemctl status systemd-udev-trigger.service' for details.
[FAILED] Failed to start Remount Root and Kernel File Systems.
See 'systemctl status systemd-remount-fs.service' for details.
         Starting Create Static Device Nodes in /dev...
         Starting Flush Journal to Persistent Storage...
[  OK  ] Reached target System Time Synchronized.
[FAILED] Failed to start Create Static Device Nodes in /dev.
See 'systemctl status systemd-tmpfiles-setup-dev.service' for details.
[FAILED] Failed to start Flush Journal to Persistent Storage.
See 'systemctl status systemd-journal-flush.service' for details.
[  OK  ] Reached target Local File Systems (Pre).
         Mounting /var/volatile...
[  OK  ] Reached target Containers.
         Starting udev Kernel Device Manager...
[FAILED] Failed to mount /var/volatile.
See 'systemctl status var-volatile.mount' for details.
[DEPEND] Dependency failed for Bind mount volatile /srv.
[DEPEND] Dependency failed for Bind mount volatile /var/cache.
[DEPEND] Dependency failed for Local File Systems.
[DEPEND] Dependency failed for Bind mount volatile /var/spool.
[DEPEND] Dependency failed for Bind mount volatile /var/lib.
[  OK  ] Reached target Timers.
[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Network.
[  OK  ] Reached target Sockets.
         Starting Create Volatile Files and Directories...
[  OK  ] Started Emergency Shell.
         Starting Load/Save Random Seed...
[  OK  ] Reached target Emergency Mode.
[  OK  ] Started udev Kernel Device Manager.
[FAILED] Failed to start Create Volatile Files and Directories.
See 'systemctl status systemd-tmpfiles-setup.service' for details.
[  OK  ] Started Load/Save Random Seed.
         Starting Update UTMP about System Boot/Shutdown...
[  OK  ] Started Update UTMP about System Boot/Shutdown.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.
You are in emergency mode. After logging in, type "journalctl -xb" to view
system logs, "systemctl reboot" to reboot, "systemctl default" or "exit"
to boot into default mode.
Press Enter for maintenance
(or press Control-D to continue):
sulogin: failed to execute /bin/sh: No such file or directory
sulogin: failed to execute /bin/sh: No such file or directory
cannot execute su shell

Reloading system manager configuration
Starting default target
You are in emergency mode. After logging in, type "journalctl -xb" to view
system logs, "systemctl reboot" to reboot, "systemctl default" or "exit"
to boot into default mode.
Press Enter for maintenance
(or press Control-D to continue):
Reloading system manager configuration
Starting default target
You are in emergency mode. After logging in, type "journalctl -xb" to view
system logs, "systemctl reboot" to reboot, "systemctl default" or "exit"
to boot into default mode.
Press Enter for maintenance
(or press Control-D to continue): [   64.582711] imx-sdma
20ec000.sdma: external firmware not found, using ROM firmware
[   69.691943] cfg80211: failed to load regulatory.db

sulogin: failed to execute /bin/sh: No such file or directory
sulogin: failed to execute /bin/sh: No such file or directory
cannot execute su shell

Reloading system manager configuration
Starting default target
You are in emergency mode. After logging in, type "journalctl -xb" to view
system logs, "systemctl reboot" to reboot, "systemctl default" or "exit"
to boot into default mode.
Press Enter for maintenance
(or press Control-D to continue):
Reloading system manager configuration
Starting default target
You are in emergency mode. After logging in, type "journalctl -xb" to view
system logs, "systemctl reboot" to reboot, "systemctl default" or "exit"
to boot into default mode.
Press Enter for maintenance

So I was not able to enter the file system.

Thank you very much Steve.

- jh

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