USB external drive size limitations?

Fabian Keil freebsd-listen at fabiankeil.de
Sat Mar 25 18:13:43 UTC 2006


Fabian Keil <freebsd-listen at fabiankeil.de> wrote:

> "Jonathan Horne" <freebsd at dfwlp.com> wrote:
> 
> > Last night I plugged in a 300GB Maxtor USB drive into my FreeBSD 6.0
> > server (with a fat filesystem), and it told me it was too big!!
> 
> > Haha, its full of my backups from my previous operating system
> > (fedora) and now im going to have a fun time getting those files
> > onto my new FreeBSD server!  Can someone recommend a course of
> > action for me here?  Google isn't really turning up anything
> > interesting relating to size of external drives.
>  
> Do you already have "options MSDOSFS_LARGE" in your kernel?

Forgot to mention that it isn't perfect. I believe the limitations
described in http://www.freebsd.org/releases/5.3R/relnotes-i386.html
are still true:

|The MSDOSFS_LARGE kernel option has been added to support FAT32 file
|systems bigger than 128GB. This option is disabled by default. It uses
|at least 32 bytes of kernel memory for each file on disk; furthermore
|it is only safe to use in certain controlled situations, such as
|read-only mount with less than 1 million files and so on. Exporting
|these large file systems over NFS is not supported.

Fabian
-- 
http://www.fabiankeil.de/
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