[opensuse] Re: ntfs write; future of FAT32: FAT40/48/64? Other FS?

On Tue, Jul 22, 2008 at 6:58 PM, Linda Walsh <suse@xxxxxxxxx> wrote:
Greg Freemyer wrote:

ntfs-3g has been supported since 10.3. It provides full ntfs read/write.

Greg

----
How stable and how fast is it?

How well does it handle the esoteric NTFS stuff not in Linux -- like
the access lists and such?

Access Lists are in Linux!!!! They just have different values.

man -k acl

shows you a few linux tools to work with them.

And smbcacls is part of Samba and allows you to work with NTFS acls.
(I've never used it.)


Is this one of the drivers that runs MS-NTFS drivers in a
compatibility mode?

Don't think so.

I was wondering -- MS supposedly opened up alot of their specs -- was
NTFS one of them?

Also -- I was wondering what people (if anyone) is thinking about
doing
for compatible filesystems for USB-thumb/flash drives?

Wasn't there a 4G limit on FAT32?...or is that just XP creation?

file limit, yes. filesystem limit is 32GB in XP I think. I have done
750GB in Linux with mkfs.vfat.

Still with a 32-bit FAT (1G), isn't it pretty much the case that
the FAT's themselves need to be resident in memory all at once to maintain
consistency? That sorta limits how big volumes might get.

Don't think so. I have not noticed our large drives being particularly slow.


With a 32-bit FAT, all full, that would take what -- (assuming signed
32-bit integers, that's only 2-G blocks. I'm not sure what size blocks
people are willing to go with -- but assuming an 8-K block size, we're still
limiting volume
sizes to 16-terabytes -- WITH a 2G FAT table -- which would be huge -- if
not
entirely impractical in practice. Just *guessing*, but anything more than
maybe
8-16M of FAT table would be stretching FAT, using that as a limiting factor,
that
constraings FAT volumes to 8K(8M-16M)=64G-128G, which is still 3-4 years
away for mem drives (8G chips were available for cameras a year ago...so
doubling every every year would be 64G in 2, every 18 months=3 years.

But main prob with FAT32 is the 2G file-size limitation. I started
hitting
that 2-4 years ago, at least. The other problems -- that large FAT size
that ideally
needs to fit in memory, might be redone to allow partial mappings -- but I
think
the device would need to be locked while a process is updating the FAT map
--
certainly not ideal.

Processes don't update FAT tables in general. The kernel FS driver
does that. And I'm sure they have it down pat by now.

I know there are plenty of file systems on linux -- but virtually
none of them are ported to Win32, and I can't see NTFS becoming a
defacto-industry standard as long as MS sits on it as proprietary.

We still use FAT as our open standard. With big files we break them
apart via split. Re-assemble with cat.

Our industry (Computer Forenisics) actually has lots of tools that
work with the split files since the need to so great.

Already, on newer electronics w/cheap ROM's (phones), some are
limited to
using 4G chips because of addressability problems. Perhaps ideally, such a
file system would get input from flash-ram designers to optimize file system
operations
with what's optimal for HW now -- and is likely to be optimal in the future.

Anyone thinking about this stuff?

linda







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