# Unrecognized NAND Flash device. **URL:** \ **Category:** Windows CE\ **Tags:** windows\ **Created:** [December 10, 2012, 2:20pm UTC](https://forums.digi.com/t/unrecognized-nand-flash-device/11175 "2012-12-10T14:20:55Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![ztiakra](https://avatars.discourse-cdn.com/v4/letter/z/f19dbf/32.png) [@ztiakra](https://forums.digi.com/u/ztiakra)\ **Post date:** [December 10, 2012, 2:20pm UTC](https://forums.digi.com/t/unrecognized-nand-flash-device/11175/1 "2012-12-10T14:20:55Z")
Hi! I have a problem with i.MX51 and NAND FLash device. After do one UBOOT update we received: NVRAM: Original Flash is BAD NVRAM: Mirror Flash is BAD NVRAM: Original Flash and Mirror Flash don’t match NVRAM: Original and Mirror don’t match NVRAM: Original and Mirror Flash don’t match NVRAM: No NVRAM contents usable NVRAM: Resetting Workcopy NVRAM: Repairing Original NVRAM: Resetting Workcopy NVRAM: Using defaults \*\*\* Warning - bad CRC or NAND, using default environment NVRAM: Using defaults U-Boot 2009.08 - dub-1.1.3 - (sep 24 2012 - 09:26:38) - GCC 4.4.3 for ConnectCore i.MX51 on a JumpStart Kit Development Board I2C: ready NAND: 256 MB DRAM: 256 MB MMC: FSL\_ESDHC: 0, FSL\_ESDHC: 1 In: serial Out: serial Err: serial Net: FEC0 [PRIME] Autoscript from TFTP… [not available] CCMX51 # … ## CCMX51 # flpart Nr | Name | Start | Size | Type | FS | Flags ## 0 | U-Boot | 0 | 768 KiB | U-Boot | | fixed 1 | NVRAM | 768 KiB | 512 KiB | NVRAM | | fixed Commands: a) Append partition d) Delete partition m) Modify partition p) Print partition table r) Reset partition table q) Quit Cmd (? for help)\> r OS Types: n) None l) Linux a) Android w) WinCE o) NET+OS OS (? for help)\> l Partition table reset Nr | Name | Start | Size | Type | FS | Flags 0 | U-Boot | 0 | 768 KiB | U-Boot | | fixed 1 | NVRAM | 768 KiB | 512 KiB | NVRAM | | fixed 2 | Splash | 1280 KiB | 1 MiB | Splash-Screen | | 3 | Kernel | 2304 KiB | 3 MiB | Linux/Android-Kernel | | 4 | RootFS | 5376 KiB | 64 MiB | Filesystem | JFFS2 | rootfs 5 | Rescue-Kernel | 70912 KiB | 3 MiB | Rescue-Linux/Android-Kernel | | 6 | Rescue-RootFS | 73984 KiB | 32 MiB | Rescue-Filesystem | JFFS2 | rootfs 7 | UserFS | 106752 KiB | 155392 KiB | Filesystem | JFFS2 | Cmd (? for help)\> q Partition table has been modified. Save? (y): y Writing Parameters to NVRAM \*\*\* Error: NVE\_NO\_SPACE: () CCMX51 # ---
**Author:** ![cpigilam](https://avatars.discourse-cdn.com/v4/letter/c/fbc32d/32.png) [@cpigilam](https://forums.digi.com/u/cpigilam)\ **Post date:** [January 23, 2013, 4:54am UTC](https://forums.digi.com/t/unrecognized-nand-flash-device/11175/2 "2013-01-23T04:54:11Z")
Hello, Are you using Wi-i.MX51(wireless module) or i.MX51(Non wireless module) module? Choose correct default u-boot image from your pc. You can find wireless and non wireless uboot images under below paths Wireless module’s U-Boot image: C:\Program Files\Digi\Windows embedded compact 7\Images\ConnectCore Wi-i.MX51\JSK\bootloader Non wireless module’s U-Boot image: C:\Program Files\Digi\Windows embedded compact 7\Images\ConnectCore i.MX51\JSK\bootloader