agree with Fam, please check your kernel config.

this page may help you :
https://fedoraproject.org/wiki/Architectures/ARM/HowToQemu#Build_Kernel_Image_From_Source

2012/11/9 Fam Zheng <famc...@gmail.com>

> Try a kernel with this enabled [1]:
>
> Device Drivers  --->
>  ATA/ATAPI/MFM/RLL support  --->
>   <*> ATA/ATAPI/MFM/RLL support
>   <*>   Enhanced IDE/MFM/RLL disk/cdrom/tape/floppy support
>   [*]     PCI IDE chipset support
>
> [1] http://www.gentoo.org/doc/en/kernel-config.xml
>
> ---
> Best regards!
> Fam Zheng
>
>
> On Fri, Nov 9, 2012 at 4:19 PM, Fam Zheng <famc...@gmail.com> wrote:
> > I'm wondering if the interface might be IDE in this case?
> >
> > ---
> > Best regards!
> > Fam Zheng
> >
> >
> > On Fri, Nov 9, 2012 at 4:09 PM, Vipin Gahlaut <gail...@gmail.com> wrote:
> >> Hi Fam,
> >>
> >> My understanding is that I need to include SCSI driver support in kernel
> >> that I already did. Do I need to include something else as well?
> >>
> >> Best Regards
> >> Vipin
> >>
> >>
> >> On Fri, Nov 9, 2012 at 1:35 PM, Fam Zheng <famc...@gmail.com> wrote:
> >>>
> >>> Is the device driver compiled in the kernel?
> >>>
> >>> ---
> >>> Best regards!
> >>> Fam Zheng
> >>>
> >>>
> >>> On Fri, Nov 9, 2012 at 3:59 PM, Vipin Gahlaut <gail...@gmail.com>
> wrote:
> >>> > Hi Dunrong,
> >>> >
> >>> > I tried your suggestion but it is not working. Please find more
> details
> >>> > below.
> >>> >
> >>> > 1. I have created image using qemu-img command (qemu-img create
> >>> > -disk.img
> >>> > 1G), loop mounted it and installed root file system on this image.
> >>> >
> >>> > 2. I am using linux kernel 3.5.5 and made sure that SCSI support is
> >>> > included
> >>> > in the kernel. Using QEMU 1.2.0
> >>> >
> >>> > 3. Running QEMU as below
> >>> >
> >>> > /usr/local/bin/qemu-system-arm -M versatilepb -kernel
> >>> > /home/vgahlaut/labs/linux-3.5.5/arch/arm/boot/zImage -nographic -hda
> >>> > /home/vgahlaut/labs/disk.img -append "root=/dev/sda mem=128M
> >>> > console=ttyAMA0,115200"
> >>> >
> >>> > 4.Getting Error (VFS: Cannot open root device "sda" or
> >>> > unknown-block(0,0):
> >>> > error -6). Please see complete logs below
> >>> > ========
> >>> > Uncompressing Linux... done, booting the kernel.
> >>> > Booting Linux on physical CPU 0
> >>> > Linux version 3.5.5 (vgahlaut@ubuntu) (gcc version 4.3.2
> (crosstool-NG
> >>> > 1.16.0) ) #21 Fri Nov 9 10:42:54 IST 2012
> >>> > CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=00093177
> >>> > CPU: VIVT data cache, VIVT instruction cache
> >>> > Machine: ARM-Versatile PB
> >>> > Memory policy: ECC disabled, Data cache writeback
> >>> > sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 178956ms
> >>> > Built 1 zonelists in Zone order, mobility grouping on.  Total pages:
> >>> > 32512
> >>> > Kernel command line: root=/dev/sda mem=128M console=ttyAMA0,115200
> >>> > PID hash table entries: 512 (order: -1, 2048 bytes)
> >>> > Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
> >>> > Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
> >>> > Memory: 128MB = 128MB total
> >>> > Memory: 126048k/126048k available, 5024k reserved, 0K highmem
> >>> > Virtual kernel memory layout:
> >>> >     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
> >>> >     fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
> >>> >     vmalloc : 0xc8800000 - 0xff000000   ( 872 MB)
> >>> >     lowmem  : 0xc0000000 - 0xc8000000   ( 128 MB)
> >>> >       .text : 0xc0008000 - 0xc0360810   (3427 kB)
> >>> >       .init : 0xc0361000 - 0xc0381cbc   ( 132 kB)
> >>> >       .data : 0xc0382000 - 0xc03a9100   ( 157 kB)
> >>> >        .bss : 0xc03a9124 - 0xc03c3c9c   ( 107 kB)
> >>> > NR_IRQS:192
> >>> > VIC @f1140000: id 0x00041190, vendor 0x41
> >>> > FPGA IRQ chip 0 "SIC" @ f1003000, 21 irqs
> >>> > Console: colour dummy device 80x30
> >>> > Calibrating delay loop... 425.16 BogoMIPS (lpj=2125824)
> >>> > pid_max: default: 32768 minimum: 301
> >>> > Mount-cache hash table entries: 512
> >>> > CPU: Testing write buffer coherency: ok
> >>> > Setting up static identity map for 0x2c2aa0 - 0x2c2af8
> >>> > devtmpfs: initialized
> >>> > NET: Registered protocol family 16
> >>> > Serial: AMBA PL011 UART driver
> >>> > dev:f1: ttyAMA0 at MMIO 0x101f1000 (irq = 12) is a PL011 rev1
> >>> > console [ttyAMA0] enabled
> >>> > dev:f2: ttyAMA1 at MMIO 0x101f2000 (irq = 13) is a PL011 rev1
> >>> > dev:f3: ttyAMA2 at MMIO 0x101f3000 (irq = 14) is a PL011 rev1
> >>> > fpga:09: ttyAMA3 at MMIO 0x10009000 (irq = 38) is a PL011 rev1
> >>> > bio: create slab <bio-0> at 0
> >>> > SCSI subsystem initialized
> >>> > Advanced Linux Sound Architecture Driver Version 1.0.25.
> >>> > Switching to clocksource timer3
> >>> > NET: Registered protocol family 2
> >>> > IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
> >>> > TCP established hash table entries: 4096 (order: 3, 32768 bytes)
> >>> > TCP bind hash table entries: 4096 (order: 2, 16384 bytes)
> >>> > TCP: Hash tables configured (established 4096 bind 4096)
> >>> > TCP: reno registered
> >>> > UDP hash table entries: 256 (order: 0, 4096 bytes)
> >>> > UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
> >>> > NET: Registered protocol family 1
> >>> > RPC: Registered named UNIX socket transport module.
> >>> > RPC: Registered udp transport module.
> >>> > RPC: Registered tcp transport module.
> >>> > RPC: Registered tcp NFSv4.1 backchannel transport module.
> >>> > NetWinder Floating Point Emulator V0.97 (double precision)
> >>> > Installing knfsd (copyright (C) 1996 o...@monad.swb.de).
> >>> > jffs2: version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
> >>> > ROMFS MTD (C) 2007 Red Hat, Inc.
> >>> > msgmni has been set to 246
> >>> > Block layer SCSI generic (bsg) driver version 0.4 loaded (major 254)
> >>> > io scheduler noop registered
> >>> > io scheduler deadline registered
> >>> > io scheduler cfq registered (default)
> >>> > clcd-pl11x dev:20: >PL110 rev0 at 0x10120000
> >>> > clcd-pl11x dev:20: >Versatile hardware, VGA display
> >>> > Console: switching to colour frame buffer device 80x60
> >>> > Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
> >>> > brd: module loaded
> >>> > physmap platform flash device: 04000000 at 34000000
> >>> > physmap-flash.0: Found 1 x32 devices at 0x0 in 32-bit bank.
> Manufacturer
> >>> > ID
> >>> > 0x000000 Chip ID 0x000000
> >>> > Intel/Sharp Extended Query Table at 0x0031
> >>> > Using buffer write method
> >>> > smc91x.c: v1.1, sep 22 2004 by Nicolas Pitre <n...@fluxnic.net>
> >>> > eth0: SMC91C11xFD (rev 1) at c8886000 IRQ 25 [nowait]
> >>> > eth0: Ethernet addr: 52:54:00:12:34:56
> >>> > mousedev: PS/2 mouse device common for all mice
> >>> > i2c /dev entries driver
> >>> > mmci-pl18x fpga:05: >mmc0: PL181 manf 41 rev0 at 0x10005000 irq 22,33
> >>> > (pio)
> >>> > mmci-pl18x fpga:0b: >mmc1: PL181 manf 41 rev0 at 0x1000b000 irq 23,34
> >>> > (pio)
> >>> > input: AT Raw Set 2 keyboard as /devices/fpga:06/serio0/input/input0
> >>> > aaci-pl041 fpga:04: >ARM AC'97 Interface PL041 rev0 at 0x10004000,
> irq
> >>> > 24
> >>> > aaci-pl041 fpga:04: >FIFO 512 entries
> >>> > TCP: cubic registered
> >>> > NET: Registered protocol family 17
> >>> > VFP support v0.3: implementor 41 architecture 1 part 10 variant 9
> rev 0
> >>> > ALSA device list:
> >>> >   #0: ARM AC'97 Interface PL041 rev0 at 0x10004000, irq 24
> >>> > input: ImExPS/2 Generic Explorer Mouse as
> >>> > /devices/fpga:07/serio1/input/input1
> >>> > VFS: Cannot open root device "sda" or unknown-block(0,0): error -6
> >>> > Please append a correct "root=" boot option; here are the available
> >>> > partitions:
> >>> > 1f00           65536 mtdblock0  (driver?)
> >>> > Kernel panic - not syncing: VFS: Unable to mount root fs on
> >>> > unknown-block(0,0)
> >>> > [<c00199f0>] (unwind_backtrace+0x0/0xf4) from [<c02c0a8c>]
> >>> > (panic+0x6c/0x1cc)
> >>> > [<c02c0a8c>] (panic+0x6c/0x1cc) from [<c0361f8c>]
> >>> > (mount_block_root+0x178/0x238)
> >>> > [<c0361f8c>] (mount_block_root+0x178/0x238) from [<c03620cc>]
> >>> > (mount_root+0x80/0x100)
> >>> > [<c03620cc>] (mount_root+0x80/0x100) from [<c0362264>]
> >>> > (prepare_namespace+0x118/0x1ec)
> >>> > [<c0362264>] (prepare_namespace+0x118/0x1ec) from [<c03614cc>]
> >>> > (kernel_init+0x144/0x1d4)
> >>> > [<c03614cc>] (kernel_init+0x144/0x1d4) from [<c0015348>]
> >>> > (kernel_thread_exit+0x0/0x8)
> >>> >
> >>> > Best Regards
> >>> > Vipin
> >>> >
> >>> >
> >>> >
> >>> >
> >>> >
> >>> > On Fri, Nov 9, 2012 at 7:39 AM, Dunrong Huang <riegama...@gmail.com>
> >>> > wrote:
> >>> >>
> >>> >> Hi,
> >>> >>
> >>> >> 2012/11/8 Vipin Gahlaut <gail...@gmail.com>
> >>> >>>
> >>> >>> Hi Experts,
> >>> >>>
> >>> >>> I am using qemu 1.2.0  and using arm versatilepb model. I am
> >>> >>> spevifying
> >>> >>> -hda hdd.img but linux is not able to recognize hard disk. I do not
> >>> >>> see it
> >>> >>> in device nodes. NONE of below exist in device nodes
> >>> >>
> >>> >>
> >>> >> try following command:
> >>> >> qemu-system-arm ... your-qemu-option ... -append "root=/dev/sda
> >>> >> mem=256"
> >>> >>>
> >>> >>>
> >>> >>> /dev/sda
> >>> >>> /dev/sda1
> >>> >>> /dev/hda
> >>> >>> /dev/hda1
> >>> >>>
> >>> >>> Can anyone please help?
> >>> >>>
> >>> >>>
> >>> >>
> >>> >>
> >>> >>
> >>> >> --
> >>> >> Best Regards,
> >>> >>
> >>> >> Dunrong Huang
> >>> >
> >>> >
> >>
> >>
>



-- 
Best Regards,

Dunrong Huang

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