smartctl and sdcard

Micka

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May 30, 2017, 8:17:44 AM5/30/17

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Hi,

I wanted to know if someone successfully used the command smartctl with the sd card ?

It could be so usefull to know the state of the sdcard, the remaining life, etc !

Przemek Klosowski

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May 30, 2017, 9:49:25 AM5/30/17

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SMART protocol is defined for ATA interface, and it is translated over USB interface by most but not all USB-ATA bridges. I have never seen it implemented for SD cards. Historically, it makes sense: SD card firmware is just a tiny block management layer, although of course there's no fundamental reason why it couldn't be expanded to provide some of the internal information via SMART---but it has never been done AFAIK.

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Micka

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May 30, 2017, 10:50:01 AM5/30/17

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I'm able with the PC to use the command smartctl to get info on my SDCard with the protocol SMART.

I found a lot of subject on this topic, and I'm working on this piece of code for the moment:

int ret = 0;
	struct mmc_ioc_cmd idata;
	memset(&idata, 0, sizeof(idata));
	memset(ext_csd, 0, sizeof(__u8) * 512);
	idata.write_flag = 0;
	idata.opcode = MMC_SEND_EXT_CSD;
	idata.arg = 0;
	idata.flags = MMC_RSP_SPI_R1 \| MMC_RSP_R1 \| MMC_CMD_ADTC;
	idata.blksz = 512;
	idata.blocks = 1;
	mmc_ioc_cmd_set_data(idata, ext_csd);

But no result for the moment!

Le mar. 30 mai 2017 à 15:49, Przemek Klosowski <przemek....@gmail.com> a écrit :

SMART protocol is defined for ATA interface, and it is translated over USB interface by most but not all USB-ATA bridges. I have never seen it implemented for SD cards. Historically, it makes sense: SD card firmware is just a tiny block management layer, although of course there's no fundamental reason why it couldn't be expanded to provide some of the internal information via SMART---but it has never been done AFAIK.

On Tue, May 30, 2017 at 8:17 AM, Micka <micka...@gmail.com> wrote:

Hi,

I wanted to know if someone successfully used the command smartctl with the sd card ?

It could be so usefull to know the state of the sdcard, the remaining life, etc !

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Przemek Klosowski

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May 31, 2017, 9:22:13 AM5/31/17

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On Tue, May 30, 2017 at 10:49 AM, Micka <micka...@gmail.com> wrote:

I'm able with the PC to use the command smartctl to get info on my SDCard with the protocol SMART.

OK, it looks like I missed something. What context are you seeing this in? USB smart card reader, I suppose?

Like I said, the USB-to-whatever bridge you're using has to support SMART protocol; there are even some USB-ATA bridges that fail to do so, so maybe the USB-SD/MMC bridge on BBB doesn't do that either.

I only used high-level tools like skdump/smartctl---never wrote SMART-reading code like your example below. Does this code work on a standard x86 platform where, as you say, smartcll talks to your SD card?

I found a lot of subject on this topic, and I'm working on this piece of code for the moment:

int ret = 0;
struct mmc_ioc_cmd idata;
memset(&idata, 0, sizeof(idata));
memset(ext_csd, 0, sizeof(__u8) * 512);
idata.write_flag = 0;
idata.opcode = MMC_SEND_EXT_CSD;
idata.arg = 0;
idata.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
idata.blksz = 512;
idata.blocks = 1;
mmc_ioc_cmd_set_data(idata, ext_csd);

But no result for the moment!

Le mar. 30 mai 2017 à 15:49, Przemek Klosowski <przemek....@gmail.com> a écrit :

SMART protocol is defined for ATA interface, and it is translated over USB interface by most but not all USB-ATA bridges. I have never seen it implemented for SD cards. Historically, it makes sense: SD card firmware is just a tiny block management layer, although of course there's no fundamental reason why it couldn't be expanded to provide some of the internal information via SMART---but it has never been done AFAIK.

On Tue, May 30, 2017 at 8:17 AM, Micka <micka...@gmail.com> wrote:

Hi,

I wanted to know if someone successfully used the command smartctl with the sd card ?

It could be so usefull to know the state of the sdcard, the remaining life, etc !

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