From: Kyungmin Park <kyungmin.park@samsung.com>
To: Adrian Hunter <ext-adrian.hunter@nokia.com>
Cc: "linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>
Subject: OneNAND: Check first or second pages for bad block information
Date: Mon, 22 Jan 2007 11:59:29 +0000 (GMT) [thread overview]
Message-ID: <7065803.123891169467169423.JavaMail.weblogic@ep_ml23> (raw)
Hi,
> I'm not sure we have to check 2nd page. Yes, Spec. says we will check 1st and 2nd ones.
>
> It increase the boot time even though it's smaller one than others.
> My experience is that the OneNAND bad block scanning time is very small (i.e. insignicant) compared with overall boot time.
> For example:
> 2048 blocks x 2 pages x 30 microseconds per page = 0.12 seconds
I think it's big :). But if you don't mind.
> The specification says:
>
> Check "FFFFh" at the 1st word of sector 0
> of spare area in 1st and 2nd page
> Based on the specification, I would presume that if a bad block goes un-noticed, it could be erased and written without error and only produc> e errors when the data is read back, by which time it is too late.
O.K., We follow the Spec.
I will commit your patch.
Thank you,
Kyungmin Park
next reply other threads:[~2007-01-22 11:59 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-22 11:59 Kyungmin Park [this message]
-- strict thread matches above, loose matches on Subject: below --
2007-01-22 7:33 OneNAND: Check first or second pages for bad block information Kyungmin Park
2007-01-22 8:45 ` Adrian Hunter
2007-01-22 9:13 ` Artem Bityutskiy
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