Hi, Thanks for the reply. I am using the default initramfs given in usr directory of source code. Actually I copied linux image to SD card and ext2fs to SCSI device. I passed one of kernel parameters as root=/dev/sda1. thats why It is getting detected. I am the new one. so do know much. -----Original Message----- From: Thorsten Schulz <stehbrettsegeln@xxxxxx> Sent: Thursday, May 8, 2008 3:38am To: abhiruchi.g@xxxxxxxxxxxxx Cc: linux-mips@xxxxxxxxxxxxxx <linux-mips@xxxxxxxxxxxxxx> Subject: Re: Alchemy DB1200 Hi, do you actually have that console device on your usb-stick? mknod -m 0600 /path/to/stick/dev/console c 5 1 mknod -m 0777 /path/to/stick/mnt/dev/null c 1 3 Thorsten PS btw. could you mail me your config/initramfslist/init how you got the kernel to boot the rootfs from usb, i never managed to. I am working on an au1550 system thats mtd-flash has problems with recent kernels. On Thu, 08 May 2008 09:11:05 +0200, <abhiruchi.g@xxxxxxxxxxxxx> wrote: > I am trying to build kernel for DB1200 board. > but kernel hangs after the following output: > Waiting 10sec before mounting root device... > scsi 0:0:0:0: Direct-Access Ut163 USB2FlashStorage 0.00 PQ: 0 ANSI: 2 > sd 0:0:0:0: [sda] 983808 512-byte hardware sectors (504 MB) > sd 0:0:0:0: [sda] Write Protect is off > sd 0:0:0:0: [sda] Assuming drive cache: write through > sd 0:0:0:0: [sda] 983808 512-byte hardware sectors (504 MB) > sd 0:0:0:0: [sda] Write Protect is off > sd 0:0:0:0: [sda] Assuming drive cache: write through > sda:<7>usb-storage: queuecommand called > sda1 > sd 0:0:0:0: [sda] Attached SCSI removable disk > sd 0:0:0:0: Attached scsi generic sg0 type 0 > VFS: Mounted root (ext2 filesystem) readonly. > mount_block_root: name=/dev/root fs=ext2 flags=32769 > Freeing unused kernel memory: 164k freed > Warning: unable to open an initial console. > Algorithmics/MIPS FPU Emulator v1.5