Re: CF Card problem

On Tue, 08 May 2007 03:16:56 -0400, ASAAR <caught@xxxxxx> wrote:

On Mon, 07 May 2007 21:48:54 -0700, Richard H. wrote:

It varies depending on the format, where from what I recall,
floppies could have 120 or fewer files in the root directory, and a
FAT16 drive probably has the 512 file limit that you recall.
Assuming the CF card could hold 512 files, if 235kb files were
copied to it, when the 512 file limit was reached the card would
contain 512 x 235kb, or about 120MB. Obviously the OP did not copy
high resolution multi-megapixel picture files if this explanation
represents the reason why he could not fill his CF card. :)


Yeah, you're probably right about 128 - I remember it was painfully easy
to hit. This used to be a common help desk problem (and maybe still is)
when users would save all their files in c:\. :-)

It'd make sense for this to have been fixed in larger versions of FAT,
but with Redmond nothing's surprising.

You don't trust Redmond too? I like that! But no, before posting
my last reply I ran a disk test utility that can rapidly create a
specified number of files, terminating early if there's a disk
error. I had it create 6,000 files in the root directories of both
a FAT32 and an NTFS drive and it completed both times without error.

Wanting to see if there was a 32k or 64k limit, I just ran the
program a few more times and the NTFS volume's root directory now
has over 80,000 files in it. For the FAT32 volume I stopped after
creating only 40,000 files since all operations were *much* slower.
I still don't know what the maximum number of root directory files
is, or if there actually is a fixed limit, but it's large enough
that I won't worry about it. Maybe Redmond set it to 640k. After
all, who'd ever need more than that! <g>


IIRC, for NTFS, it's unlimited for the root directory, because the
root's directory size is dynamic.
IIRC, also, for FAT32, it's 64K entries, but I may be disremembering
that one.

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Relevant Pages

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