# Dataman start failed **URL:** \ **Category:** PX4 Autopilot\ **Created:** [November 23, 2023, 8:30am UTC](https://discuss.px4.io/t/dataman-start-failed/35474 "2023-11-23T08:30:09Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Jaddu](https://discuss.px4.io/letter_avatar_proxy/v4/letter/j/ebca7d/32.png) [@Jaddu](https://discuss.px4.io/u/Jaddu)\ **Post date:** [November 23, 2023, 8:30am UTC](https://discuss.px4.io/t/dataman-start-failed/35474/1 "2023-11-23T08:30:09Z")
Hi, I am trying to use the on-board NAND flash, on my custom board, to allow for data storage and all the other operations which require SD storage. I have a custom driver for the NAND flash that I am using and have successfully created stored parameters file onto the flash using MTD module. Now I want to allow the dataman to access one of the MTD partition, MTD\_MAINSTORAGE for storing other data. So far I haven’t been successful. I have attached the latest boot-log if that helps, in identifying the issue. Hope someone can help. Thanks in advance jaddu ---
**Author:** ![Jaddu](https://discuss.px4.io/letter_avatar_proxy/v4/letter/j/ebca7d/32.png) [@Jaddu](https://discuss.px4.io/u/Jaddu)\ **Post date:** [November 23, 2023, 8:32am UTC](https://discuss.px4.io/t/dataman-start-failed/35474/2 "2023-11-23T08:32:16Z")
sercon: Regist[boot] Fault Log info File No 4 Length 3177 flags:0x01 state:1 eri[boot] Fault Log is Armed ng CDC/ACM serial driver sercon: Successfully registered the CDC/ACM serial driver INFO [PX4\_MTD] Starting MTD, MT25QL driver WARN [PX4\_MTD] failed to set bus speed INFO [PX4\_MTD] Starting MTD, MT25QL driver ERROR [PX4\_MTD] failed to initialize mtd driver ERROR [PX4\_MTD] mtd failure: -5 bus 2 address 1 class 4 nsh: sysinit: fopen failed: No such file or directory HW arch: APN\_PHI\_V1 PX4 git-hash: 48d9cbb2d802ec42f5b1b13d792480df8fda47f4 PX4 version: 1.14.0 0 (17694720) PX4 git-branch: danfe-v1 OS: NuttX OS version: Release 11.0.0 (184549631) OS git-hash: 3f77354c0dc88793a47ff3b57595195ab45f7ba9 Build datetime: Nov 23 2023 13:59:01 Build uri: localhost Build variant: default Toolchain: GNU GCC, 9.2.1 20191025 (release) [ARM/arm-9-branch revision 277599] PX4GUID: 000100000000323136383332511300320048 MCU: STM32F42x, rev. 5 INFO [param] selected parameter default file /fs/mtd\_params INFO [param] importing from ‘/fs/mtd\_params’ Board architecture defaults: /etc/init.d/rc.board\_arch\_defaults Board defaults: /etc/init.d/rc.board\_defaults nsh: tone\_alarm: command not found INFO [dataman] Start of Dataman module INFO [dataman] backend file operation pointers found INFO [dataman] Dataman Subscribes (3) INFO [dataman] starting file initialize INFO [dataman] dm\_operations\_data.file.fd value: (-1) WARN [dataman] Could not open data manager file /fs/mainstorage/dataman ERROR [dataman] dataman start faERROR [dataman] going to end witiled hout accessing dataman file nsh: rgbled: command not found nsh: rgbled\_ncp5623c: command not found nsh: rgbled\_lp5562: command not found nsh: rgbled\_is31fl3195: command not found nsh: rc\_update: command not found nsh: manual\_control: command not found Board sensors: /etc/init.d/rc.board\_sensors ERROR [board\_adc] PX4\_MAX\_ADC\_CHANNELS is too small (12, 13) ERROR [param] Parameter FD\_EXT\_ATS\_EN not found nsh: icm20948\_i2c\_passthrough: command not found nsh: hmc5883: command not found nsh: ist8308: command not found nsh: ist8310: command not found nsh: lis2mdl: command not found nsh: lis3mdl: command not found nsh: lis3mdl: command not found nsh: qmc5883l: command not found nsh: rm3100: command not found nsh: ak09916: command not found nsh: battery\_status: command not found nsh: commander: command not found nsh: dshot: command not found No autostart ID found ekf2 [363:100] nsh: ekf2: command not found Starting MAVLink on /dev/ttyS0 nsh: rc\_input: command not found nsh: navigator: command not found Board extras: /etc/init.d/rc.board\_extras INFO [logger] logger started (mode=all) INFO [logger] log root dir created: /fs/mainstorage/log NuttShell (NSH) NuttX-11.0.0 nsh\> e[KERROR [dataman\_client] timeout after 1000 ms! ERROR [dataman\_client] Failed to get client ID! ERROR [dataman\_client] timeout after 1000 ms! ERROR [dataman\_client] Failed to get client ID! INFO [mavlink] mode: Config, data rate: 100000 B/s on /dev/ttyACM0 @ 2000000B ERROR [dataman\_client] timeout after 1000 ms! WARN [mavlink] offboard mission init failed ERROR [dataman\_client] timeout after 1000 ms! ERROR [dataman\_client] timeout after 1000 ms! INFO [mavlink] mode: Normal, data rate: 1200 B/s on /dev/ttyS0 @ 57600B