From: Adrian Hunter <adrian.hunter@nokia.com>
To: twebb <taliaferro62@gmail.com>
Cc: "linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>
Subject: Re: ubifs wear leveling across entire device
Date: Fri, 04 Dec 2009 13:31:12 +0200 [thread overview]
Message-ID: <4B18F300.7080006@nokia.com> (raw)
In-Reply-To: <dbdb2ea60912030931j380a7702hc92d4fbe72341730@mail.gmail.com>
twebb wrote:
> I'm confused about how wear leveling occurs across the entire device
> in the following example. Could someone help me understand what I'm
> missing?
>
> 4 GiB flash device (nand MLC):
> 4 MTD partitions defined:
> 0 - "p1" - 0x00000000 - 0x00800000
> 1 - "p2" - 0x00800000 - 0x10000000
> 2 - "p3" - 0x10000000 - 0x80000000
> 3 - "p4" - 0x80000000 - 0x100000000
>
> kernel args specify 3 ubi volumes:
> ubi.mtd=p1 ubi.mtd=p2 ubi.mtd=p3
> (p4 is reserved and no volumes or filesystems sit on top of it)
That is 3 UBI devices not 3 UBI volumes
>
> The "vol_size" for each of the ubi volumes (as specified in the
> ubinize cfg file) is slightly less than the corresponding mtd
> partition size. The volumes are specified as dynamic because they
> need to be RW.
next prev parent reply other threads:[~2009-12-04 11:31 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-03 17:31 ubifs wear leveling across entire device twebb
2009-12-04 11:31 ` Adrian Hunter [this message]
2009-12-07 15:41 ` twebb
2009-12-07 20:05 ` Adrian Hunter
2009-12-07 22:44 ` twebb
2009-12-08 6:36 ` Artem Bityutskiy
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