Re: MMC quirks relating to performance/lifetime.

Arnd Bergmann
2011-02-18T13:44:26Z

On Friday 18 February 2011, Andrei Warkentin wrote:
> On Fri, Feb 11, 2011 at 4:33 PM, Andrei Warkentin <andreiw@motorola.com> wrote:
> > Arnd,
> >
> > 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
> >
>
> Ok. Big mistake. Sorry about that. This card is Sandisk card. I got
> confused over all the manfids changing.
>
> Here is the Toshiba card:
>
> cid - 1101004d4d4333324703101a17746d00
> csd - 900e00320f5903ffffffffe796400000
> erase_size - 524288
> fwrev - 0x0
> hwrev - 0x0
> manfid - 0x000011
> name - MMC32G
> oemid - 0x0100
> preferred_erase_size - 4194304
>
> I'll get you the flashbench timings for both.

I'm curious. Neither the manfid nor the oemid fields of either card
match what I have seen on SD cards, I would expect them to be

Sandisk: manfid 0x000003, oemid 0x5344
Toshiba: manfid 0x000002, oemid 0x544d

I have not actually seen any Toshiba SD cards, but I assume that they
use the same controllers as Kingston.

Does anyone know if the IDs have any correlation between MMC and SD
controllers?

Arnd