Status of hfs support as of 2.4.0-test1-ac21

Status of hfs support as of 2.4.0-test1-ac21

[Halfmann, Klaus]

I played around with hfs support in this developer kernel and
penetrated my hfs partion with some paralell cp-s and rm-s
(I copied "the linux kernel" documentation around :-)
After every step I rebootet into MacOs and ran DiskFirstAid (DFA)
but nothing was found. cp and rm complained about problems with the
.finderinfo and .resource directories, but I expected it this way.
I used my iBook for testing.

Is there anything else i _must_ check for a fs to be considered
stable ?

In case anyone reports a bug to me in this area I'll try to fix
it.

Meanwhile I'll have a look at the hfsutils
( http://www.mars.org/home/rob/proj/hfs/ ) and will start
moving them to HFS+.

I found however some bugs not related to hfs and may reproduce
them in detail in case someone asks:
  - the console driver messed up some pixels while editing
  - hdparm did not always work correctly
    (I use pmud and it calls hdparm depending on the battery load)
    Sometimes I got stuck with the message "hda interrupt lost"
    or similar.


Greetings,

|       |                   Klaus Halfmann    khalfmann@libra.de
|       |
|    i  | --.  r---  --- |  Libra Software    Tel +49 (0)621 41997-0
|    |  b-- |  |    a--- |  Erzbergerstr. 17  Fax +49 (0)621 41997-30
L--- |  --- |  |    .----.  68165 Mannheim

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Re: Status of hfs support as of 2.4.0-test1-ac21

[Michel Lanners]

Hi Klaus,

On  23 Jun, this message from Halfmann, Klaus echoed through cyberspace:
> Is there anything else i _must_ check for a fs to be considered
> stable ?

Did you try accessing CDRoms ith their 2K block size? While late
2.3.99/2.4 kernels have always been able to access hfs disks in a more
or less stable way, CDRoms have not been working for a very long time...

The LinuxPPC 2K CDs are an example of such hfs CDs.

Thanks

Michel

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Re: Status of hfs support as of 2.4.0-test1-ac21

[Mike DeSimone]

At 06:35 -0500 6/23/00, Michel Lanners wrote:
>Did you try accessing CDRoms ith their 2K block size? While late
>2.3.99/2.4 kernels have always been able to access hfs disks in a more
>or less stable way, CDRoms have not been working for a very long time...

Really?  All the CDs I burn in Toast must have 512 byte sectors.  I've
always been able to access them from both my PPC and X86 Linux boxes.

Or maybe it's because I threw out the Philips and got a Pioneer.  I dunno.
_______________________________________________________________________________
Mike DeSimone        Applied Research Laboratories: The University of Texas
Research Engineer    Mail to: PO Box 8029       Shipments to: 10000 Burnet Rd.
Sonar Development             Austin, TX 78713                Austin, TX 78758
Office (512) 835-3061-------FAX (512) 835-3259--------desimone@arlut.utexas.edu

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Re: Status of hfs support as of 2.4.0-test1-ac21

[Benjamin Herrenschmidt]

On Fri, Jun 23, 2000, Halfmann, Klaus <khalfmann@libra.de> wrote:

>
>I found however some bugs not related to hfs and may reproduce
>them in detail in case someone asks:
>  - the console driver messed up some pixels while editing
>  - hdparm did not always work correctly
>    (I use pmud and it calls hdparm depending on the battery load)
>    Sometimes I got stuck with the message "hda interrupt lost"
>    or similar.

That's interesting. Could you give me more details about what you do
excatly with hdparm that is causing the lost interrupt ? Can you try to
use it manually (without pmud) and reproduce the problem ?

Ben.


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Re: Status of hfs support as of 2.4.0-test1-ac21

[Michael Schmitz]

>   - hdparm did not always work correctly
>     (I use pmud and it calls hdparm depending on the battery load)
>     Sometimes I got stuck with the message "hda interrupt lost"
>     or similar.

What sort of machine is that on? The lost interrupt should only happen
(copiously) on Pismo when the pwrctl script forces a disk shutdown on
battery low. Having HD requests time out often enough to force a disk
reset is the only way to power up the disk again there.

	Michael


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Re: Status of hfs support as of 2.4.0-test1-ac21

[flar]

Halfmann, Klaus wrote:
> Meanwhile I'll have a look at the hfsutils
> ( http://www.mars.org/home/rob/proj/hfs/ ) and will start
> moving them to HFS+.

I don't know if you want to look at my code, but I've been working on a
module for the kernel to do HFS+. I'd be willing to help you out with the
updates to hfsutils. I'll be putting up new HFS+ code shortly, perhaps
this weekend if I get a chance.

	Brad Boyer
	flar@pants.nu


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