[Nexus 9 General] USBhost:
FIRE-ICE's ramdisk used

shell@flounder:/ $ mount
rootfs / rootfs ro,relatime 0 0
tmpfs /dev tmpfs rw,nosuid,relatime,mode=755 0 0
devpts /dev/pts devpts rw,relatime,mode=600 0 0
proc /proc proc rw,relatime 0 0
sysfs /sys sysfs rw,relatime 0 0
none /sys/fs/cgroup tmpfs rw,relatime,mode=750,gid=1000 0 0
tmpfs /mnt/asec tmpfs rw,relatime,mode=755,gid=1000 0 0
tmpfs /mnt/obb tmpfs rw,relatime,mode=755,gid=1000 0 0
pstore /sys/fs/pstore pstore rw,relatime 0 0
adb /dev/usb-ffs/adb functionfs rw,relatime 0 0
/dev/block/platform/sdhci-tegra.3/by-name/APP /system ext4 ro,noatime 0 0
/dev/block/platform/sdhci-tegra.3/by-name/VNR /vendor ext4 ro,noatime 0 0
/dev/block/platform/sdhci-tegra.3/by-name/CAC /cache ext4 rw,noatime,nobarrier 0 0
/sys/kernel/debug /sys/kernel/debug debugfs rw,relatime,mode=755 0 0
tmpfs /data tmpfs rw,nosuid,nodev,noatime,size=262144k,mode=771,uid=1000,gid=1000 0 0
shell@flounder:/ $

kernel log

<6>[ 4.206343] [S_HUB][CW_MCU] Sensor calibration matrix is (gs 1 gy 1 ls 1 bs 1)
<6>[ 4.213319] [S_HUB][CW_MCU] cwmcu_irq_handler: MAGIC COVER = 0x0
<14>[ 4.261129] e2fsck: e2fsck 1.42.9 (28-Dec-2013)
<14>[ 4.261302] e2fsck: /dev/block/platform/sdhci-tegra.3/by-name/CAC was not cleanly unmounted, check forced.
<14>[ 4.261344] e2fsck: Pass 1: Checking inodes, blocks, and sizes
<14>[ 4.261376] e2fsck: Pass 2: Checking directory structure
<14>[ 4.261408] e2fsck: Pass 3: Checking directory connectivity
<14>[ 4.261440] e2fsck: Pass 4: Checking reference counts
<14>[ 4.261470] e2fsck: Pass 5: Checking group summary information
<14>[ 4.261503] e2fsck: /dev/block/platform/sdhci-tegra.3/by-name/CAC: 17/16384 files (0.0% non-contiguous), 1072/65536 blocks
<14>[ 4.261554] e2fsck: e2fsck terminated by exit(1)
<6>[ 4.264673] EXT4-fs (mmcblk0p30): mounted filesystem without journal. Opts: barrier=0
<14>[ 4.264781] fs_mgr: __mount(source=/dev/block/platform/sdhci-tegra.3/by-name/CAC,target=/cache,type=ext4)=0
<14>[ 4.264889] fs_mgr: Running /system/bin/fsck.f2fs -f /dev/block/platform/sdhci-tegra.3/by-name/UDA
<14>[ 4.275884] fsck.f2fs: Info: Force to fix corruption
<14>[ 4.276020] fsck.f2fs: Info: sector size = 512
<14>[ 4.276058] fsck.f2fs: Info: total sectors = 53714944 (in 512bytes)
<14>[ 4.276093] fsck.f2fs:	Can't find a valid F2FS superblock at 0x0
<14>[ 4.276126] fsck.f2fs:	Can't find a valid F2FS superblock at 0x1
<14>[ 4.276176] fsck.f2fs: fsck.f2fs terminated by exit(255)
<6>[ 4.277069] F2FS-fs (mmcblk0p31): Magic Mismatch, valid(0xf2f52010) - read(0x3f730e9f)
<3>[ 4.277100] F2FS-fs (mmcblk0p31): Can't find valid F2FS filesystem in 1th superblock
<6>[ 4.277523] F2FS-fs (mmcblk0p31): Magic Mismatch, valid(0xf2f52010) - read(0xae719289)
<3>[ 4.277559] F2FS-fs (mmcblk0p31): Can't find valid F2FS filesystem in 2th superblock
<6>[ 4.277627] F2FS-fs (mmcblk0p31): Magic Mismatch, valid(0xf2f52010) - read(0x3f730e9f)
<3>[ 4.277649] F2FS-fs (mmcblk0p31): Can't find valid F2FS filesystem in 1th superblock
<6>[ 4.277674] F2FS-fs (mmcblk0p31): Magic Mismatch, valid(0xf2f52010) - read(0xae719289)
<3>[ 4.277692] F2FS-fs (mmcblk0p31): Can't find valid F2FS filesystem in 2th superblock
<14>[ 4.277849] fs_mgr: __mount(source=/dev/block/platform/sdhci-tegra.3/by-name/UDA,target=/data,type=f2fs)=-1
<3>[ 4.278392] EXT4-fs (mmcblk0p31): VFS: Can't find ext4 filesystem
<14>[ 4.278512] fs_mgr: check_fs(): mount(/dev/block/platform/sdhci-tegra.3/by-name/UDA,/data,ext4)=-1
<14>[ 4.278578] fs_mgr: Running /system/bin/e2fsck on /dev/block/platform/sdhci-tegra.3/by-name/UDA
<6>[ 4.283402] [SAR0] update_firmware, 14594
<6>[ 4.284004] [SAR] from FIRMWARE file = 1f, Chip FW ver: 1f
<6>[ 4.284031] [SAR0] cy8c_check_sensor
<6>[ 4.285114] [SAR0] CY8C_SAR_V1f
<14>[ 4.298505] e2fsck: e2fsck 1.42.9 (28-Dec-2013)
<14>[ 4.298627] e2fsck: ext2fs_open2: Bad magic number in super-block
<14>[ 4.298663] e2fsck: /system/bin/e2fsck: Superblock invalid, trying backup blocks...
<14>[ 4.298700] e2fsck: /system/bin/e2fsck: Bad magic number in super-block while trying to open /dev/block/platform/sdhci-tegra.3/by-name/UDA
<14>[ 4.298734] e2fsck:
<14>[ 4.298765] e2fsck: The superblock could not be read or does not describe a correct ext2
<14>[ 4.298798] e2fsck: filesystem. If the device is valid and it really contains an ext2
<14>[ 4.298831] e2fsck: filesystem (and not swap or ufs or something else), then the superblock
<14>[ 4.298863] e2fsck: is corrupt, and you might try running e2fsck with an alternate superblock:
<14>[ 4.298895] e2fsck: e2fsck -b 8193 <device>
<14>[ 4.298925] e2fsck:
<14>[ 4.298969] e2fsck: e2fsck terminated by exit(8)
<3>[ 4.299877] EXT4-fs (mmcblk0p31): VFS: Can't find ext4 filesystem
<14>[ 4.300084] fs_mgr: __mount(source=/dev/block/platform/sdhci-tegra.3/by-name/UDA,target=/data,type=ext4)=-1
<11>[ 4.300876] fs_mgr: fs_mgr_mount_all(): possibly an encryptable blkdev /dev/block/platform/sdhci-tegra.3/by-name/UDA for mount /data type f2fs )

heres how one looks when it mounts

<6>EXT4-fs (mmcblk0p29): mounted filesystem without journal. Opts: (null)
<14>fs_mgr: __mount(source=/dev/block/platform/sdhci-tegra.3/by-name/APP,target=/system,type=ext4)=0
<6>EXT4-fs (mmcblk0p24): mounted filesystem without journal. Opts: (null)
<14>fs_mgr: __mount(source=/dev/block/platform/sdhci-tegra.3/by-name/VNR,target=/vendor,type=ext4)=0
<4>EXT4-fs (mmcblk0p30): Ignoring removed nomblk_io_submit option
<6>EXT4-fs (mmcblk0p30): mounted filesystem without journal. Opts: nomblk_io_submit,errors=remount-ro
<14>fs_mgr: check_fs(): mount(/dev/block/platform/sdhci-tegra.3/by-name/CAC,/cache,ext4)=0
<14>fs_mgr: Running /system/bin/e2fsck on /dev/block/platform/sdhci-tegra.3/by-name/CAC
<14>e2fsck: e2fsck 1.42.9 (28-Dec-2013)
<14>e2fsck: /dev/block/platform/sdhci-tegra.3/by-name/CAC: clean, 17/16384 files, 1072/65536 blocks
<6>EXT4-fs (mmcblk0p30): mounted filesystem without journal. Opts: barrier=0
<14>fs_mgr: __mount(source=/dev/block/platform/sdhci-tegra.3/by-name/CAC,target=/cache,type=ext4)=0
<14>fs_mgr: Running /system/bin/fsck.f2fs -f /dev/block/platform/sdhci-tegra.3/by-name/UDA
<14>fsck.f2fs: Info: Force to fix corruption
<14>fsck.f2fs: Info: sector size = 512
<14>fsck.f2fs: Info: total sectors = 53714944 (in 512bytes)
<14>fsck.f2fs:	Can't find a valid F2FS superblock at 0x0
<14>fsck.f2fs:	Can't find a valid F2FS superblock at 0x1
<14>fsck.f2fs: fsck.f2fs terminated by exit(255)
<6>F2FS-fs (mmcblk0p31): mounting..
<6>F2FS-fs (mmcblk0p31): Magic Mismatch, valid(0xf2f52010) - read(0x3f730e9f)
<3>F2FS-fs (mmcblk0p31): Can't find a valid F2FS filesystem in 1th superblock
<6>F2FS-fs (mmcblk0p31): Magic Mismatch, valid(0xf2f52010) - read(0xae719289)
<3>F2FS-fs (mmcblk0p31): Can't find a valid F2FS filesystem in 2th superblock
<3>F2FS-fs (mmcblk0p31): mount failed
<14>fs_mgr: __mount(source=/dev/block/platform/sdhci-tegra.3/by-name/UDA,target=/data,type=f2fs)=-1
<3>EXT4-fs (mmcblk0p31): VFS: Can't find ext4 filesystem
<14>fs_mgr: check_fs(): mount(/dev/block/platform/sdhci-tegra.3/by-name/UDA,/data,ext4)=-1
<14>fs_mgr: Running /system/bin/e2fsck on /dev/block/platform/sdhci-tegra.3/by-name/UDA
<6>[S_HUB][CW_MCU] check_fw_version: Sensor HUB firmware is up-to-date
<6>[S_HUB][CW_MCU] Firmware Architecture version 1, Sense version 0, Cywee lib version 15, Water number 36, Active Engine 2, Project Mapping 1
<6>[S_HUB][CW_MCU] Sensor calibration matrix is (gs 1 gy 1 ls 1 bs 1)
<6>htc_battery_bq2419x htc_battery_bq2419x.9: Battery id adc value is 357
<6>[S_HUB][CW_MCU] cwmcu_irq_handler: MAGIC COVER = 0x0
<14>e2fsck: e2fsck 1.42.9 (28-Dec-2013)
<14>e2fsck: ext2fs_open2: Bad magic number in super-block
<14>e2fsck: /system/bin/e2fsck: Superblock invalid, trying backup blocks...
<14>e2fsck: /system/bin/e2fsck: Bad magic number in super-block while trying to open /dev/block/platform/sdhci-tegra.3/by-name/UDA
<14>e2fsck:
<14>e2fsck: The superblock could not be read or does not describe a correct ext2
<14>e2fsck: filesystem. If the device is valid and it really contains an ext2
<14>e2fsck: filesystem (and not swap or ufs or something else), then the superblock
<14>e2fsck: is corrupt, and you might try running e2fsck with an alternate superblock:
<14>e2fsck: e2fsck -b 8193 <device>
<14>e2fsck:
<14>e2fsck: e2fsck terminated by exit(8)
<3>EXT4-fs (mmcblk0p31): VFS: Can't find ext4 filesystem
<14>fs_mgr: __mount(source=/dev/block/platform/sdhci-tegra.3/by-name/UDA,target=/data,type=ext4)=-1
<11>fs_mgr: fs_mgr_mount_all(): possibly an encryptable blkdev /dev/block/platform/sdhci-tegra.3/by-name/UDA for mount /data type f2fs )
<14>fs_mgr: Running /system/bin/fsck.f2fs -f /dev/block/dm-0
<14>fsck.f2fs: Info: Force to fix corruption
<14>fsck.f2fs: Info: sector size = 512
<14>fsck.f2fs: Info: total sectors = 53714944 (in 512bytes)
<14>fsck.f2fs:
<14>fsck.f2fs: [FSCK] Unreachable nat entries [Ok..] [0x0]
<14>fsck.f2fs: [FSCK] SIT valid block bitmap checking [Ok..]
<14>fsck.f2fs: [FSCK] Hard link checking for regular file [Ok..] [0x0]
<14>fsck.f2fs: [FSCK] valid_block_count matching with CP [Ok..] [0x71cd2]
<14>fsck.f2fs: [FSCK] valid_node_count matcing with CP (de lookup) [Ok..] [0x297b]
<14>fsck.f2fs: [FSCK] valid_node_count matcing with CP (nat lookup) [Ok..] [0x297b]
<14>fsck.f2fs: [FSCK] valid_inode_count matched with CP [Ok..] [0x281b]
<14>fsck.f2fs: [FSCK] free segment_count matched with CP [Ok..] [0x2f12]
<14>fsck.f2fs: [FSCK] next block offset is free [Ok..]
<14>fsck.f2fs: [FSCK] other corrupted bugs [Ok..]
<14>fsck.f2fs:
<14>fsck.f2fs: Done.
<6>F2FS-fs (dm-0): mounting..
<3>F2FS-fs (dm-0): recovery did not fully complete
<6>F2FS-fs (dm-0): mounted filesystem
<14>fs_mgr: __mount(source=/dev/block/dm-0,target=/data,type=f2fs)=0
<3>F2FS-fs (dm-0): Unrecognized mount option "seclabel" or missing value
<6>OPEN_CLIENT_SESSION_COMPAT: 0x5f902ace 0x4cd85e5c 0xb88754ae 0xafdd228c
<6>warning: `daemonsu' uses 32-bit capabilities (legacy support in use)
<11>init: untracked pid 227 exited with status 0
<4>EXT4-fs (mmcblk0p29): warning: mounting unchecked fs, running e2fsck is recommended
<6>EXT4-fs (mmcblk0p29): re-mounted. Opts: (null)
<6>EXT4-fs (mmcblk0p29): re-mounted. Opts: (null)
<6>EXT4-fs (mmcblk0p29): re-mounted. Opts: (null)
<11>init: untracked pid 250 exited with status 0
<11>init: untracked pid 345 exited with status 1
<4>EXT4-fs (mmcblk0p29): warning: mounting unchecked fs, running e2fsck is recommended
<6>EXT4-fs (mmcblk0p29): re-mounted. Opts: (null)
<6>EXT4-fs (mmcblk0p29): re-mounted. Opts: (null)
<6>EXT4-fs (mmcblk0p29): re-mounted. Opts: (null)
<6>EXT4-fs (mmcblk0p29): re-mounted. Opts: (null)