We have a custom made AM335x board I'm working on and I have encountered a problem when mounting an ubifs image from nand. If I ...

(1) Write an ubifs image to nand (2) Mount the ubifs image (3) Repeat step (2)

... this then corrupts the ubifs image.

Below is a full log.

Can anyone help ?

Regards Mark J. --- U-Boot SPL 2013.01-00336-g044fbc4-dirty (Feb 26 2013 - 14:07:36) U-Boot 2013.01-00336-g044fbc4-dirty (Feb 26 2013 - 14:07:36) I2C: ready DRAM: 256 MiB WARNING: Caches not enabled NAND: 256 MiB MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1 musb-hdrc: ConfigData=0xde (UTMI-8, dyn FIFOs, bulk combine, bulk split, HB-ISO Rx, HB-ISO Tx, SoftConn) musb-hdrc: MHDRC RTL version 2.0 musb-hdrc: setup fifo_mode 4 musb-hdrc: 28/31 max ep, 16384/16384 memory USB Host mode controller at 47401000 using PIO, IRQ 0 Net: cpsw U-Boot# nandecc hw 2 HW BCH8 selected U-Boot# mw.b 82000000 ff 81f000 U-Boot# dhcp 82000000 10.0.0.100:/nanobone/rootfs.ubifs link up on port 0, speed 100, full duplex BOOTP broadcast 1 *** Unhandled DHCP Option in OFFER/ACK: 46 *** Unhandled DHCP Option in OFFER/ACK: 46 DHCP client bound to address 10.0.0.104 Using cpsw device TFTP from server 10.0.0.100; our IP address is 10.0.0.104 Filename '/nanobone/rootfs.ubifs'. Load address: 0x82000000 Loading: ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ################################################################# ##################### 657.2 KiB/s done Bytes transferred = 6029312 (5c0000 hex) U-Boot# nand erase 200000 4000000

NAND erase: device 0 offset 0x200000, size 0x4000000 Erasing at 0x41e0000 -- 100% complete. OK U-Boot# nand write 82000000 200000 81f000

NAND write: device 0 offset 0x200000, size 0x81f000 8515584 bytes written: OK U-Boot# nandecc hw 2 HW BCH8 selected U-Boot# mtdparts default U-Boot# ubi part rootfs Creating 1 MTD partitions on "nand0": 0x000000200000-0x000004200000 : "mtd=6" UBI: attaching mtd1 to ubi0 UBI: physical eraseblock size: 131072 bytes (128 KiB) UBI: logical eraseblock size: 129024 bytes UBI: smallest flash I/O unit: 2048 UBI: sub-page size: 512 UBI: VID header offset: 512 (aligned 512) UBI: data offset: 2048 UBI: volume 0 ("root") re-sized from 44 to 503 LEBs UBI: attached mtd1 to ubi0 UBI: MTD device name: "mtd=6" UBI: MTD device size: 64 MiB UBI: number of good PEBs: 512 UBI: number of bad PEBs: 0 UBI: max. allowed volumes: 128 UBI: wear-leveling threshold: 4096 UBI: number of internal volumes: 1 UBI: number of user volumes: 1 UBI: available PEBs: 0 UBI: total number of reserved PEBs: 512 UBI: number of PEBs reserved for bad PEB handling: 5 UBI: max/mean erase counter: 1/0 U-Boot# nandecc hw 2 HW BCH8 selected U-Boot# mtdparts default U-Boot# ubi part rootfs UBI: mtd1 is detached from ubi0 Creating 1 MTD partitions on "nand0": 0x000000200000-0x000004200000 : "mtd=6" UBI: attaching mtd1 to ubi0 UBI: physical eraseblock size: 131072 bytes (128 KiB) UBI: logical eraseblock size: 129024 bytes UBI: smallest flash I/O unit: 2048 UBI: sub-page size: 512 UBI: VID header offset: 512 (aligned 512) UBI: data offset: 2048 ECC: uncorrectable. ECC: uncorrectable. UBI error: ubi_io_read: error -74 while reading 64 bytes from PEB 510:0, read 64 bytes ECC: uncorrectable. ECC: uncorrectable. UBI error: ubi_io_read: error -74 while reading 512 bytes from PEB 510:512, read 512 bytes ECC: uncorrectable. ECC: uncorrectable. UBI error: ubi_io_read: error -74 while reading 64 bytes from PEB 511:0, read 64 bytes ECC: uncorrectable. ECC: uncorrectable. UBI error: ubi_io_read: error -74 while reading 512 bytes from PEB 511:512, read 512 bytes ECC: uncorrectable. ECC: uncorrectable.