Date: Mon, 02 Apr 2001 18:13:27 +0000 From: Gunther Schadow <gunther@aurora.regenstrief.org> To: freebsd-small@freebsd.org Subject: problems with DiskOnChip ... Message-ID: <3AC8C147.950B1F41@aurora.regenstrief.org>
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Hi,
please lend me a hand with DiskOnChip. I have one stone with 8 MB,
it's got MD-2800-008 printed on the chip.
I got FreeBSD-4.2-RELEASE. Configured as
device fla0 at isa?
and properly detected as in:
fla0 at iomem 0xc8000-0xc9fff on isa0
fla0: <M-Systems DiskOnChip 8MB>
fla0: 7.8MB (15920 sectors), 995 cyls, 16 heads, 1 S/T, 512 B/S
Getting a disklabel onto them was a pain. But I have had a hard time
with disklabeling since the old days of 386BSD were past. Someone's
being too smart now :-). Anyway, I finally got the disklabel on,
but it was pure luck. Playing around with whether or not to write the
boot blocks etc. Once the disklabel was right I could newfs. But
in disklabel and mount operations I get a bunch of stray interrupt
(#7) warnings and it says that partition size != filesystem size
or something. But I can read and write just fine.
Except during boot. This is what happens:
>> FreeBSD/i386 BOOT
Default: 0:ad(0,a)kernel.gz
boot: ?
. .. bin sbin usr mnt etc dev stand boot.config kernel.config kernel.gz var boot
kernel
(so it appears to be able to access the disk, reading the label from
it) But when I try to boot I get this:
>> FreeBSD/i386 BOOT
Default: 0:ad(0,a)?
boot: kernel
Disk error 0x1 (lba=0x1768)
Invalid format
Strange enough, I will get the same when I then try to boot from floppy
instead:
>> FreeBSD/i386 BOOT
Default: 0:fd(0,a)?
boot: 0:fd(0,a)?
. .. kernel.gz fs.PICOBSD.gz boot etc kernel.config boot.config config.tar.gz
>> FreeBSD/i386 BOOT
Default: 0:fd(0,a)?
boot: 0:fd(0,a)kernel.gz
Invalid format
So, may be the boot sector is still no good. Oh man, that means back to
the argument with Mr. Disklabel :-(
Here are dumps from fdisk and disklabel:
ngigw1>fdisk fla0
******* Working on device /dev/fla0 *******
parameters extracted from in-core disklabel are:
cylinders=995 heads=16 sectors/track=1 (16 blks/cyl)
parameters to be used for BIOS calculations are:
cylinders=995 heads=16 sectors/track=1 (16 blks/cyl)
Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 1 is:
<UNUSED>
The data for partition 2 is:
<UNUSED>
The data for partition 3 is:
<UNUSED>
The data for partition 4 is:
sysid 165,(FreeBSD/NetBSD/386BSD)
start 0, size 50000 (24 Meg), flag 80 (active)
beg: cyl 0/ sector 1/ head 0;
end: cyl 1023/ sector 63/ head 255
ngigw1>disklabel -r fla0
# /dev/fla0c:
type: unknown
disk: fla0s1
label: ngigw2-root
flags:
bytes/sector: 512
sectors/track: 1
tracks/cylinder: 16
sectors/cylinder: 16
cylinders: 995
sectors/unit: 15920
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0 # milliseconds
track-to-track seek: 0 # milliseconds
drivedata: 0
8 partitions:
# size offset fstype [fsize bsize bps/cpg]
a: 15919 0 4.2BSD 512 4096 5 # (Cyl. 0 - 994*)
c: 15919 0 unused 0 0 # (Cyl. 0 - 994*)
And this is what happens when I mount:
ngigw1>mount /dev/fla0a /mnt
stray irq 7
fla0: raw partition size != slice size
fla0: start 0, end 15919, size 15920
stray irq 7
fla0c: start 0, end 15918, size 15919
Isn't this weird?
The partition entry always slips from the first to the fourth partition.
Trying to configure without a proper partition table (i.e., use raw disk)
doesn't work either...
What should I do, what's wrong here? Anybody having more luck
with this?
Any help is much appreciated!
-Gunther
--
Gunther Schadow, M.D., Ph.D. gschadow@regenstrief.org
Medical Information Scientist Regenstrief Institute for Health Care
Adjunct Assistent Professor Indiana University School of Medicine
tel:1(317)630-7960 http://aurora.regenstrief.org
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