From: Arnd Bergmann <arnd@arndb.de>
To: Andrei Warkentin <andreiw@motorola.com>
Cc: linux-arm-kernel@lists.infradead.org,
Linus Walleij <linus.walleij@linaro.org>,
linux-mmc@vger.kernel.org
Subject: Re: MMC quirks relating to performance/lifetime.
Date: Sat, 12 Feb 2011 18:05:47 +0100 [thread overview]
Message-ID: <201102121805.47311.arnd@arndb.de> (raw)
In-Reply-To: <AANLkTinaY2RM86tX4ex+zsMwFKUdBNVpdZ8fFrt-e12_@mail.gmail.com>
On Friday 11 February 2011 23:33:42 Andrei Warkentin wrote:
> On Wed, Feb 9, 2011 at 3:13 AM, Arnd Bergmann <arnd@arndb.de> wrote:
> Yes, this is a Toshiba card. I've sent the patch as a reply to Linus' email.
>
> cid - 02010053454d3332479070cc51451d00
> csd - d00f00320f5903ffffffffff92404000
> erase_size - 524288
> fwrev - 0x0
> hwrev - 0x0
> manfid - 0x000002
> name - SEM32G
> oemid - 0x0100
> preferred_erase_size - 2097152
Very interesting. So the manfid is the same as on most Kingston cards,
but the oemid is different. Most cards have a two-letter ASCII code
in there, 0x544d ("TM") on Kingston cards, and I always assumed that
this stood for "Toshiba Memory".
What is even stranger is the size value (among other fields) in the CSD,
the card claims a size of exactly 32GB, which I find hard to believe,
given that there are always some bad and reserved blocks.
Are you sure that the card you have is authentic? I've heard a lot about
fake USB sticks advertising a size that is much larger than the actual
flash inside of them.
Also this is the first card that I see advertise an allocation unit
size of 2MB (preferred_erase_size), all other cards seem to advertise
4 MB these days, even if they actually have 2 or 8 MB.
Arnd
WARNING: multiple messages have this Message-ID (diff)
From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: MMC quirks relating to performance/lifetime.
Date: Sat, 12 Feb 2011 18:05:47 +0100 [thread overview]
Message-ID: <201102121805.47311.arnd@arndb.de> (raw)
In-Reply-To: <AANLkTinaY2RM86tX4ex+zsMwFKUdBNVpdZ8fFrt-e12_@mail.gmail.com>
On Friday 11 February 2011 23:33:42 Andrei Warkentin wrote:
> On Wed, Feb 9, 2011 at 3:13 AM, Arnd Bergmann <arnd@arndb.de> wrote:
> Yes, this is a Toshiba card. I've sent the patch as a reply to Linus' email.
>
> cid - 02010053454d3332479070cc51451d00
> csd - d00f00320f5903ffffffffff92404000
> erase_size - 524288
> fwrev - 0x0
> hwrev - 0x0
> manfid - 0x000002
> name - SEM32G
> oemid - 0x0100
> preferred_erase_size - 2097152
Very interesting. So the manfid is the same as on most Kingston cards,
but the oemid is different. Most cards have a two-letter ASCII code
in there, 0x544d ("TM") on Kingston cards, and I always assumed that
this stood for "Toshiba Memory".
What is even stranger is the size value (among other fields) in the CSD,
the card claims a size of exactly 32GB, which I find hard to believe,
given that there are always some bad and reserved blocks.
Are you sure that the card you have is authentic? I've heard a lot about
fake USB sticks advertising a size that is much larger than the actual
flash inside of them.
Also this is the first card that I see advertise an allocation unit
size of 2MB (preferred_erase_size), all other cards seem to advertise
4 MB these days, even if they actually have 2 or 8 MB.
Arnd
next prev parent reply other threads:[~2011-02-12 17:06 UTC|newest]
Thread overview: 117+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-08 21:22 MMC quirks relating to performance/lifetime Andrei Warkentin
2011-02-08 21:38 ` Wolfram Sang
2011-02-08 21:38 ` Wolfram Sang
2011-02-08 22:42 ` Russell King - ARM Linux
2011-02-09 8:37 ` Linus Walleij
2011-02-09 8:37 ` Linus Walleij
2011-02-09 9:13 ` Arnd Bergmann
2011-02-09 9:13 ` Arnd Bergmann
2011-02-11 22:33 ` Andrei Warkentin
2011-02-11 22:33 ` Andrei Warkentin
2011-02-12 17:05 ` Arnd Bergmann [this message]
2011-02-12 17:05 ` Arnd Bergmann
2011-02-12 17:33 ` Andrei Warkentin
2011-02-12 17:33 ` Andrei Warkentin
2011-02-12 18:22 ` Arnd Bergmann
2011-02-12 18:22 ` Arnd Bergmann
2011-02-18 1:10 ` Andrei Warkentin
2011-02-18 1:10 ` Andrei Warkentin
2011-02-18 13:44 ` Arnd Bergmann
2011-02-18 13:44 ` Arnd Bergmann
2011-02-18 19:47 ` Andrei Warkentin
2011-02-18 19:47 ` Andrei Warkentin
2011-02-18 22:40 ` Andrei Warkentin
2011-02-18 22:40 ` Andrei Warkentin
2011-02-18 23:17 ` Andrei Warkentin
2011-02-18 23:17 ` Andrei Warkentin
2011-02-19 11:20 ` Arnd Bergmann
2011-02-19 11:20 ` Arnd Bergmann
2011-02-20 5:56 ` Andrei Warkentin
2011-02-20 5:56 ` Andrei Warkentin
2011-02-20 15:23 ` Arnd Bergmann
2011-02-20 15:23 ` Arnd Bergmann
2011-02-22 7:05 ` Andrei Warkentin
2011-02-22 7:05 ` Andrei Warkentin
2011-02-22 16:49 ` Arnd Bergmann
2011-02-22 16:49 ` Arnd Bergmann
2011-02-19 9:54 ` Arnd Bergmann
2011-02-19 9:54 ` Arnd Bergmann
2011-02-20 4:39 ` Andrei Warkentin
2011-02-20 4:39 ` Andrei Warkentin
2011-02-20 15:03 ` Arnd Bergmann
2011-02-20 15:03 ` Arnd Bergmann
2011-02-22 6:42 ` Andrei Warkentin
2011-02-22 6:42 ` Andrei Warkentin
2011-02-22 16:42 ` Arnd Bergmann
2011-02-22 16:42 ` Arnd Bergmann
2011-02-11 23:23 ` Linus Walleij
2011-02-11 23:23 ` Linus Walleij
2011-02-12 10:45 ` Arnd Bergmann
2011-02-12 10:45 ` Arnd Bergmann
2011-02-12 10:59 ` Russell King - ARM Linux
2011-02-12 10:59 ` Russell King - ARM Linux
2011-02-12 16:28 ` Arnd Bergmann
2011-02-12 16:28 ` Arnd Bergmann
2011-02-12 16:37 ` Russell King - ARM Linux
2011-02-12 16:37 ` Russell King - ARM Linux
2011-02-11 22:27 ` Andrei Warkentin
2011-02-11 22:27 ` Andrei Warkentin
2011-02-12 18:37 ` Arnd Bergmann
2011-02-12 18:37 ` Arnd Bergmann
2011-02-13 0:10 ` Andrei Warkentin
2011-02-13 0:10 ` Andrei Warkentin
2011-02-13 17:39 ` Arnd Bergmann
2011-02-13 17:39 ` Arnd Bergmann
2011-02-14 19:29 ` Andrei Warkentin
2011-02-14 19:29 ` Andrei Warkentin
2011-02-14 20:22 ` Arnd Bergmann
2011-02-14 20:22 ` Arnd Bergmann
2011-02-14 22:25 ` Andrei Warkentin
2011-02-14 22:25 ` Andrei Warkentin
2011-02-15 17:16 ` Arnd Bergmann
2011-02-15 17:16 ` Arnd Bergmann
2011-02-17 2:08 ` Andrei Warkentin
2011-02-17 2:08 ` Andrei Warkentin
2011-02-17 15:47 ` Arnd Bergmann
2011-02-17 15:47 ` Arnd Bergmann
2011-02-20 11:27 ` Andrei Warkentin
2011-02-20 11:27 ` Andrei Warkentin
2011-02-20 14:39 ` Arnd Bergmann
2011-02-20 14:39 ` Arnd Bergmann
2011-02-22 7:46 ` Andrei Warkentin
2011-02-22 7:46 ` Andrei Warkentin
2011-02-22 17:00 ` Arnd Bergmann
2011-02-22 17:00 ` Arnd Bergmann
2011-02-23 10:19 ` Andrei Warkentin
2011-02-23 10:19 ` Andrei Warkentin
2011-02-23 16:09 ` Arnd Bergmann
2011-02-23 16:09 ` Arnd Bergmann
2011-02-23 22:26 ` Andrei Warkentin
2011-02-23 22:26 ` Andrei Warkentin
2011-02-24 9:24 ` Arnd Bergmann
2011-02-24 9:24 ` Arnd Bergmann
2011-02-25 11:02 ` Andrei Warkentin
2011-02-25 11:02 ` Andrei Warkentin
2011-02-25 12:21 ` Arnd Bergmann
2011-02-25 12:21 ` Arnd Bergmann
2011-03-01 18:48 ` Jens Axboe
2011-03-01 18:48 ` Jens Axboe
2011-03-01 19:11 ` Arnd Bergmann
2011-03-01 19:11 ` Arnd Bergmann
2011-03-01 19:15 ` Jens Axboe
2011-03-01 19:15 ` Jens Axboe
2011-03-01 19:51 ` Arnd Bergmann
2011-03-01 19:51 ` Arnd Bergmann
2011-03-01 21:33 ` Andrei Warkentin
2011-03-01 21:33 ` Andrei Warkentin
2011-03-02 10:34 ` Andrei Warkentin
2011-03-02 10:34 ` Andrei Warkentin
2011-03-05 9:23 ` Andrei Warkentin
2011-03-05 9:23 ` Andrei Warkentin
2011-02-11 14:41 ` Pavel Machek
2011-02-11 14:51 ` Arnd Bergmann
2011-02-11 15:20 ` Lei Wen
2011-02-11 15:25 ` Arnd Bergmann
2011-03-08 6:59 ` Pavel Machek
2011-03-08 14:03 ` Arnd Bergmann
2011-03-08 14:03 ` Arnd Bergmann
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