Jared,

 Thanks for the help. The md pseudo-device was already
enabled when I reported the problem. I commented out
the MFS option and enabled the FFS_EI option. But the
end result is still the same. It looks like the ffs
module does not know how to create / on the ramdisk
(md0a) AND/OR expects a filesystem to be ready when it
accesses the device.
   The platform is similar to lubbock in that it uses
the same underlying processor (Intel Xscale PXA255)
-but this is something that should be more or less
platform-independent and Im surprised why its not
working. Can someone provide me the equivalent config
file? The one within the distro for lubbock does not
enable memory-based root filesystem. 

thanks & regards
-kamal

--- Jared Momose <jpmomose@hotmail.com> wrote:

> Kamal,
> 
> For a root memory disk you need to include the
> kernel option "pseudo-device 
> md" as opposed to "file-system MFS". Also, when you
> build your memory disk, 
> be conscious of the endianness used by makefs
> (specified by the -B option). 
> When developing on systems with different
> endianness, compiling both host 
> and target kernels with "options FFS_EI" (endian
> independence) might not be 
> a bad idea.
> 
> Best regards,
> jared.
> 
> 
> >Hello,
> >
> >  I configured the kernel as per the link here;-
>
>http://www.bsdnewsletter.com/2003/09/Features102.html
> >
> >I find that mount_ffs fails with errno 79. I have
> >enabled both MFS and FFS in the config file.
> Attached
> >below is the output. Also, the bootup mechanism
> does
> >not allow me to select mfs (generic, ffs, halt,
> >reboot)  Can someone help with setting root to RAM?
> >
> >pasted below output from bootup.
> >
> >thanks
> >-kamal
> >------------------------------------
> >
> >switching to new L1 page table
> >@0xa01fc000...bootstrap done.
> >init subsystems: stacks vectors undefined page pmap
> >Copyright (c) 1996, 1997, 14
> >     The NetBSD Foundation, Inc.  All rights
> reserved.
> >Copyright (c) 1982, 1986, 1989, 1991, 1993
> >     The Regents of the University of California. 
> All
> >rights reserved.
> >
> >NetBSD 2.0 (TRITON) #48: Mon Jan 10 14:21:36 EST
> 2005
> >
>
>kprasad@donald:/home/Product/Biometric/NetBSD/2.0/usr/src/sys/arch/evbaN
> >total memory = 16384 KB
> >avail memory = 8708 KB
> >mainbus0 (root)
> >cpu0 at mainbus0: PXA250 rev 6 (XScale core)
> >cpu0: DC enabled IC enabled WB enabled LABT branch
> >prediction enabled
> >cpu0: 32KB/32B 32-way Instruction cache
> >cpu0: 32KB/32B 32-way write-back-locking Data cache
> >pxaip0 at mainbus0: PXA2x0 Onchip Peripheral Bus
> >pxaip0: CPU clock = 99.527 MHz
> >pxaintc0 at pxaip0 addr 0x40d00000-0x40d0001f:
> >Interrupt Controller
> >pxagpio0 at pxaip0 addr 0x40e00000-0x40e0006f: GPIO
> >Controller
> >com0 at pxaip0 addr 0x40100000-0x4010001f intr 22:
> >ns16550a, working fifo
> >com0: console
> >saost0 at pxaip0 addr 0x40a00000-0x40a0001f
> >saost0: SA-11x0 OS Timer
> >clock: hz=100 stathz = 64
> >md0: internal 4096 KB image area
> >cpu_lwp_fork: 0xc07214d4 0xc2a42000 0xc07214d4
> >0xc07214d4
> >l1->procaddr=0xc01ed000
> l1->procaddr->u_pcb=0xc01ed000
> >pid=1 pmap=0xc07250e4
> >l2->procaddr=0xc2a38000
> l2->procaddr->u_pcb=0xc2a38000
> >pid=1 pmap=0xc2a41000
> >boot device: <unknown>
> >root on md0a dumps on md0b
> >no file system for md0 (dev 0x1200)
> >cannot mount root, error = 79
> >root device (default md0a):
> >dump device (default md0b):
> >file system (default generic): ffs
> >root on md0a dumps on md0b
> >cannot mount root, error = 22
> >------------------------------------------
> >
> >
> >
> >
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> 


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