fdisk oddities

fdisk oddities

[Brian K. Michalk]

I have been having some problems (still).  I thought I would sit 
back and listen, but it's been quiet lately.

It seems as though the doc2000 is not storing cylinders, sectors or
heads after fdisk exits.  I manually set them, and used very small
values just in case there was some sort of problem with the 72 MB
doc I have.  Here is the script:

Script started on Mon Dec 27 23:49:09 1999
embed:~/mtd-19991025/kernel# fdisk /dev/nftla1
You must set heads sectors and cylinders.
You can do this from the extra functions menu.

Command (m for help): p

Disk /dev/nftla1: 0 heads, 0 sectors, 0 cylinders
Units = cylinders of 1 * 512 bytes

       Device Boot    Start       End    Blocks   Id  System
/dev/nftla1p1            10      2304      1147+  83  Linux native

Command (m for help): x

Expert command (m for help): c
Number of cylinders (1-65535): 16

Expert command (m for help): h
Number of heads (1-256): 16

Expert command (m for help): s
Number of sectors (1-63): 9
Warning: setting sector offset for DOS compatiblity

Expert command (m for help): r

Command (m for help): p

Disk /dev/nftla1: 16 heads, 9 sectors, 16 cylinders
Units = cylinders of 144 * 512 bytes

       Device Boot    Start       End    Blocks   Id  System
/dev/nftla1p1             1        16      1147+  83  Linux native

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
Re-read table failed with error 22: Invalid argument.
Reboot your system to ensure the partition table is updated.

WARNING: If you have created or modified any DOS 6.x
partitions, please see the fdisk manual page for additional
information.

-- 
Brian Michalk  <http://www.awpi.com/michalk>
Life is what you make of it ... never wish you had done something.
Aviator, experimental aircraft builder, motorcyclist, SCUBA diver
musician, home-brewer, entrepreneur and SINGLE!


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Re: fdisk oddities

[David Woodhouse]

michalk@sisko.awpi.com said:
>  It seems as though the doc2000 is not storing cylinders, sectors or
> heads after fdisk exits.  I manually set them, and used very small
> values just in case there was some sort of problem with the 72 MB doc
> I have.  Here is the script:

I get this on hard drives. They make up the geometry on boot, and I believe 
that they only read it from the partition table if they're _really_ confused 
and can't work out what it ought to be.

If you _really_ want to do it, you can alter the NFTL code so that you can 
tell it what the geometry should be - just like you can tell the kernel on its 
command line. But it shouldn't really help. If there are problems with the 
72 Mb device, they're not going to go away if you tell it the physical 
geometry is different - it'll still use all the flash anyway.

--
dwmw2




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RE: fdisk oddities

[Oron Ogdan]

There is a bug in version 1.21 of the firmware in the calculation of the
geometry which effects the 72MB version. You should use the 1.22 tools +
firmware. The version is still not available on our web site, I will find
out when it is due to be public. 

I don't want to send the zip file to the list and overload everybody, Until
it's made public anyone who needs the new version please send me an email.

To use it :

Just run in DOS (sorry we don't have any Linux version of the tools yet)
dupdate /win=XXXX /s:doc122.exb
where XXXX is the address of your DOC

Regards

Oron

Oron Ogdan
European Technical Manager
M-Systems Flash Disk Pioneers

email : orono@m-sys.com
efax : +1.(603).761.5426



-----Original Message-----
From: David Woodhouse [mailto:dwmw2@infradead.org]
Sent: Monday, January 24, 2000 9:53 AM
To: Brian K. Michalk
Cc: mtd@imladris.mvhi.com
Subject: Re: fdisk oddities 



michalk@sisko.awpi.com said:
>  It seems as though the doc2000 is not storing cylinders, sectors or
> heads after fdisk exits.  I manually set them, and used very small
> values just in case there was some sort of problem with the 72 MB doc
> I have.  Here is the script:

I get this on hard drives. They make up the geometry on boot, and I believe 
that they only read it from the partition table if they're _really_ confused

and can't work out what it ought to be.

If you _really_ want to do it, you can alter the NFTL code so that you can 
tell it what the geometry should be - just like you can tell the kernel on
its 
command line. But it shouldn't really help. If there are problems with the 
72 Mb device, they're not going to go away if you tell it the physical 
geometry is different - it'll still use all the flash anyway.

--
dwmw2




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Re: fdisk oddities

[David Woodhouse]

Orono@m-sys.com said:
> Just run in DOS (sorry we don't have any Linux version of the tools
> yet) 

Try doc_loadbios. I'm not sure how effective it is - my testbed machine won't 
boot when the DiskOnChip BIOS is enabled anyway :)



--
dwmw2




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