What situation would you use a Mikrotik router for? On Thu, Jul 26, 2012 at 6:33 AM, Kelly Hogan <[email protected]> wrote:
> Hi All, > > We've had a successful port of OpenWRT to the rb751 for some time but a > recent batch of new boards refuse to take our pxeboot image after erasing > the kernel and rootfs mtd partitions. Upon examination of the boards, it > appears that MikroTik has moved from an 8Mb flash to a 16Mb flash. > (Hooray!) These boards can be identified by a longer MMCX connector out > the back of the case, (making an L MMCX connector usable ) and a mac > address starting with D4:CA..... > > What we see happening is that when our PXEboot image loads, we see a > kernel mtd1 partition as 3.8M in size, (as before) but when we unlock it, > and format it, we see 768K "used" after mount. However, nothing is in the > mounted directory. > > The main difference we see in dmesg between the old rb751s and the newer > rb751s is this: > > *Old Boards:* > [ 1.130000] NAND flash driver for the RouterBOARD 750 version 0.1.0 > [ 1.200000] NAND device: Manufacturer ID: 0xec, Chip ID: 0x76 *(Samsung > NAND 64MiB 3,3V 8-bit)* > [ 1.300000] Scanning device for bad blocks > [ 1.650000] Creating 3 MTD partitions on "NAND 64MiB 3,3V 8-bit": > [ 1.720000] 0x000000000000-0x000000040000 : "booter" > [ 1.790000] 0x000000040000-0x000000400000 : "kernel" > [ 1.850000] 0x000000400000-0x00000*4000000* : "rootfs" > [ 1.910000] mtd: partition "rootfs" set to be root filesystem > [ 1.980000] mtd: partition "rootfs_data" created automatically, > ofs=98C000, len=3674000 > [ 2.080000] 0x00000098c000-0x000004000000 : "rootfs_data" > > *New Boards:* > [ 1.010000] NAND flash driver for the RouterBOARD 750 version 0.1.0 > [ 1.020000] NAND device: Manufacturer ID: 0xec, Chip ID: 0xf1 (*Samsung > NAND 128MiB 3,3V 8-bit)* > [ 1.030000] Scanning device for bad blocks > [ 1.090000] Bad eraseblock 687 at 0x0000055e0000 > [ 1.130000] Creating 3 MTD partitions on "NAND 128MiB 3,3V 8-bit": > [ 1.130000] 0x000000000000-0x000000040000 : "booter" > [ 1.140000] 0x000000040000-0x000000400000 : "kernel" > [ 1.150000] 0x000000400000-0x00000*8000000* : "rootfs" > [ 1.150000] mtd: partition "rootfs" set to be root filesystem > > > root@OpenWrt:/etc/init.d# mount -t yaffs2 /dev/mtdblock1 /mnt/kernel > root@OpenWrt:/etc/init.d# df -h > Filesystem Size Used Available Use% Mounted on > tmpfs 14.4M 60.0K 14.3M 0% /tmp > tmpfs 512.0K 0 512.0K 0% /dev > /dev/mtdblock1 3.8M 768.0K 3.0M 20% /mnt/kernel > > A du shows that there is no data other than the bare directories > > root@OpenWrt:/mnt# du -h * > 2.0K kernel/lost+found > 4.0K kernel > > Running some diagnostics reveals that the partition is the size we expect. > > root@OpenWrt:/etc/init.d# mtdinfo /dev/mtd1 > mtd1 > Name: kernel > Type: nand > Eraseblock size: 131072 bytes, 128.0 KiB > Amount of eraseblocks: 30 (3932160 bytes, 3.8 MiB) > Minimum input/output unit size: 2048 bytes > Sub-page size: 512 bytes > OOB size: 64 bytes > Character device major/minor: 90:2 > Bad blocks are allowed: true > Device is writable: true > > Erasing seems to be fine. > > root@OpenWrt:/usr/sbin# ./flash_erase /dev/mtd1 0 0 > Erasing 128 Kibyte @ 3a0000 -- 100 % complete > > But formatting fails: > > root@OpenWrt:/usr/sbin# ftl_format /dev/mtd1 > Partition size = 3840 kb, erase unit size = 128 kb, 1 transfer units > Reserved 5%, formatted size = 3572224 bytes > Erasing all blocks... > -------+-------+-------+------ > Writing erase unit headers... > write failed: Invalid argument > format failed. > > So where should we make changes to support the new NAND flash, to get the > 3.8M back like the old version of flash, on our pxeboot image, and > ultimately, our kernel and rootfs that we replace RouterOS with? > > Any ideas would be greatly appreciated. > > Thanks! > > > > _______________________________________________ > openwrt-devel mailing list > [email protected] > https://lists.openwrt.org/mailman/listinfo/openwrt-devel > >
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