Hello All, i'm new to this forum and really new to embedded linux. I've been trying for quite a while to figure out how to boot from a sata disk. Well, I didn't succeed. My aim is to install a gentoo-distro. The following is the partition-layout of my sata disk: Code: /dev/sda1 20480 307199 143360 83 Linux /dev/sda2 307200 20787199 10240000 82 Linux swap / Solaris /dev/sda3 20787200 234440703 106826752 83 Linux and my fstab: Code: /dev/sda1 /boot ext2 noauto,noatime 1 2 /dev/sda3 / ext4 noatime 0 1 /dev/sda2 none swap sw 0 0 /dev/cdrom /mnt/cdrom auto noauto,ro 0 0 /dev/fd0 /mnt/floppy auto noauto 0 0 proc /proc proc defaults 0 0 sysfs /sys sysfs defaults 0 0 I've tried several things. 1) I used the unico Kernel, which is available at git. I compiled the kernel using the config from Code: cat /proc/config.gz from a running UDOObuntu_quad_v1.1.zip I compiled it with Code: make -j5 LOADADDR=0x12000000 uImage , copied it to my boot-partition which is /dev/sda1 and did all the uboot - commands step by step to make sure the kernel would be found. NOTE: The kernel was done in a "chrooted" environment with a fresh gentoo stage 3 installation. Unfortunately that was all I was able to achieve. The boot process stopped imediately after the Kernel Welcome Message "Starting Kernel" was issued. 2) I copied the kernel form a running UDOObuntu_quad_v1.1.zip to my boot-partition, modyfied the uboot variables to Code: sataargs=setenv bootargs console=${console},${baudrate} root=${sataroot} ${hdmi_patch} ${memory} ${video} sataboot=if sata init; then echo Booting from sata ...; run sataloaduimage; run sataargs; bootm; else sata boot failed; fi satadev=0 sataloaduimage=ext2load sata 0:1 0x12000000 uImage satapart=1 sataroot=/dev/sda3 and did a run sataboot. This time the kernel booted until it stopped with NOTE: On my sata disk was a fresh gentoo stage 3 installation. Code: [ 3.026253] snvs_rtc snvs_rtc.0: setting system clock to 2015-01-18 17:22:14 UTC (1421601734) [ 3.035514] VFS: Cannot open root device "sda3" or unknown-block(0,0) [ 3.041971] Please append a correct "root=" boot option; here are the available partitions: [ 3.050342] b300 15558144 mmcblk0 driver: mmcblk [ 3.055675] b301 6803527 mmcblk0p1 00000000-0000-0000-0000-000000000000 [ 3.063248] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) [ 3.071551] [<800475d4>] (unwind_backtrace+0x0/0xfc) from [<8065e690>] (panic+0x74/0x19c) [ 3.079750] [<8065e690>] (panic+0x74/0x19c) from [<80008cc4>] (mount_block_root+0x16c/0x220) [ 3.088204] [<80008cc4>] (mount_block_root+0x16c/0x220) from [<80008e50>] (mount_root+0xd8/0xf4) [ 3.096998] [<80008e50>] (mount_root+0xd8/0xf4) from [<80008f8c>] (prepare_namespace+0x120/0x184) [ 3.105899] [<80008f8c>] (prepare_namespace+0x120/0x184) from [<800083dc>] (kernel_init+0x108/0x144) [ 3.115053] [<800083dc>] (kernel_init+0x108/0x144) from [<80041080>] (kernel_thread_exit+0x0/0x8) [ 3.123941] CPU1: stopping Well, mmm, what I don't understand is the fact, that I'm offered a couple of partions from the sd card and not from the sata disk. Is the kernel missing some sata-support? Can anybody give me a hint ? Thanks in advance and have a nice evening, schnabelvieh
Hello again, well, it is up and running now ;-) I copied my gentoo installation to a root partition with an ext3 filesystem instead of an ext4 filesystem. I dont't know wether this is a kernel-configuration or a uboot-configuration problem. My uboot - image is the U-Boot 2013 release 2.1 available at udoo.org, the kernel is still identical to the one used in the UDOObuntu_quad_v1.1.zip release. Haven't tried yet with a self-compiled unico kernel. Have Fun, schnabelvieh
