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Subject: Re: "warning!: only 995 of 1984 eraseblocks have valid erase counter"
From: Artem Bityutskiy <dedekind1@gmail.com>
To: Gilles <gilles.ganault@free.fr>
Date: Thu, 23 Jun 2011 12:14:01 +0300
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On Sun, 2011-06-19 at 12:37 +0200, Gilles wrote:
> Hello
> 
> 	After "make" built rootfs.ubifs, I ran ubinize before uploading the
> file to a web server.
> 
> I then downloaded that file on a uClinux appliance, and ran the
> following command to format /dev/mtd2 with the image:
> =========
> ubiformat /dev/mtd2 -s 512 -f rootfs.ubi.img
> =========
> 
> This command triggers the following warning:
> =========
> ...
> libscan: scanning eraseblock 1982 -- 99 % complete  MTD_ioctl
> MTD_read
> libscan: scanning eraseblock 1983 -- 100 % complete  MTD_ioctl
> MTD_read
> 
> ubiformat: 995 eraseblocks have valid erase counter, mean value is 14
> ubiformat: 989 eraseblocks are supposedly empty
> ubiformat: warning!: only 995 of 1984 eraseblocks have valid erase
> counter
> ubiformat: mean erase counter 14 will be used for the rest of
> eraseblock
> ubiformat: continue? (yes/no)
> =========
> 
> Running just "ubiformat /dev/mtd2 -s 512" triggers the same warning.
> 
> I don't know what the warning really means, and what the consequences
> are when answering "yes". Could someone tell me?

I think it is self-explanatory. Please, ask specific question. WRT to
consequences - it should not be critical.

-- 
Best Regards,
Artem Bityutskiy