From: Alex Zeffertt <ajz@cambridgebroadband•com>
To: "Billalabeitia, Jose Carlos (IndSys,
GEPM)" <jc.billalabeitia@indsys•ge.com>
Cc: linuxppc-embedded@lists•linuxppc.org
Subject: Re: Formatting JFFS2 Flash
Date: Wed, 13 Mar 2002 17:53:46 +0000 [thread overview]
Message-ID: <3C8F922A.8090201@cambridgebroadband.com> (raw)
In-Reply-To: A1C99F4731CAD111BA5400A024FC3B0CBE0414@ESBILMA01EDCGE
Question:
Did you initialise the FS with
cat jffs2.image > /dev/mtd0
before you tried to mount /mtdblock0 ?
If you did not, then kernel threads will indeed start formatting the FS after you mount it.
2nd question:
Did you use an empty directory with mkfs.jffs2 to make your jffs2.image? This doesn't work - you
end up with a 0 length jffs2.image! If this was the case then even if you did initialise the FS
with "cat jffs2.image > /dev/mtd0" you will still find the kernel threads format the FS after you
mount it.
I think this is a bug - the workaround is to use a non-empty folder to make your jffs2.image from.
Alex
Billalabeitia, Jose Carlos (IndSys, GEPM) wrote:
> Hi:
>
> I have a PPC 860T custom board with kernel
> 2.4.4-2001-11-11-denx and rtai-24.1.4-2-denx. I have
> a JFFS2 filesystem on 14MB Flash. I make an initial
> filesystem with the "mkfs.jffs2" utility, and the first time
> I copy a 1MB file into it, it takes about 2 minutes, and
> then on it takes 10 seconds to copy into it the same file.
> I suppose that the first time, jffs2 is doing something like
> "formatting" the flash.
> Does anybody out there know how to do this "formatting"
> in a smarter way?
>
> Thank you
> Billa
>
>
>
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2002-03-13 17:53 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-03-13 15:50 Formatting JFFS2 Flash Billalabeitia, Jose Carlos (IndSys, GEPM)
2002-03-13 17:53 ` Alex Zeffertt [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-03-13 16:14 Navin Boppuri
2002-03-14 8:13 Billalabeitia, Jose Carlos (IndSys, GEPM)
2002-03-14 8:33 Billalabeitia, Jose Carlos (IndSys, GEPM)
2002-03-14 11:31 ` Alex Zeffertt
2002-03-14 11:42 ` Wolfgang Denk
2002-03-14 13:30 ` Jim Lewis
2002-03-14 17:46 Billalabeitia, Jose Carlos (IndSys, GEPM)
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