Date: Fri, 19 Sep 1997 18:56:47 +0930 From: Greg Lehey <grog@lemis.com> To: Sue Blake <sue@welearn.com.au> Cc: jfielden@geocities.com, FreeBSD Questions <questions@FreeBSD.ORG> Subject: Re: Warning message, what does it mean? Message-ID: <19970919185647.10855@lemis.com> In-Reply-To: <Pine.LNX.3.95.970919190348.2543B-100000@zipper.zip.com.au>; from Sue Blake on Fri, Sep 19, 1997 at 07:17:29PM %2B1000 References: <19970919173130.36808@lemis.com> <Pine.LNX.3.95.970919190348.2543B-100000@zipper.zip.com.au>
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On Fri, Sep 19, 1997 at 07:17:29PM +1000, Sue Blake wrote:
>
> On Fri, 19 Sep 1997, Greg Lehey wrote:
>
>>>>> mountmsdosfs(): Warning: root directory is not a multiple of the
>>>>> clustersize in length.
>
>> This is exactly the situation I was referring to. If I were you, I'd
>> worry. FIPS doesn't do a perfect job, and it leaves pointers outside
>> the slice. If you're unlucky, msdosfs will use one of these pointers
>> and place random garbage in other slices.
>
> I've watched this thread occur twice before, and used the web site to search
> the archives, hoping to find answers. There's always some who say don't
> worry, some who say expect doom and destruction. Is the real situation that
> it doesn't hurt at all if you mount read-only but might crash everything
> otherwise? Or what?
Recall my disclaimer at the beginning of the thread. I don't use
msdosfs, and I haven't looked at the code. But my recollection of the
last discussion is that:
1. msdosfs is so buggy that it needs a complete rewrite. The
possibility exists that it has happened and passed me by.
2. FIPS is buggy and doesn't resize everything in the file system.
In particular, some block pointers can point outside the resultant
file system.
3. This combination can cause msdosfs to write outside its partition.
4. If you don't allow msdosfs to write, it probably won't write
outside its partition.
> I partitioned my first SCSI, a 2 gig disk, with Partition Magic.
> small primary DOS
> extended partition with two small logical drives
> two teensy empty NTFS to assist drive letter assignment
> One large NTFS with yucky stuff on it
> a little over 1 gig FreeBSD
>
> I get this error when attempting to mount any of the dos partitions.
>
> So, if I simply use Partition Magic again and have it resize the partitions
> to kosher sizes, and/or change the cluster size, will that stop FreeBSD from
> complaining or not? If so, what figures are appropriate for drives about
> 125mb and 250mb?
Sorry, I can't comment on this.
Greg
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