All SD card mounts read-only after mounting locked card

up vote
0
down vote

favorite

I'm having a project with the SD card reader (likely driver) for my Dell machine running 18.04.

If I ever insert a SD card in the "locked" position, any other SD card can not be written to regardless of the physical potion of the switch, until the next re-boot.

One odd thing, is if the switch on the card is unlocked, it says "Operation not permitted", but if it's locked it says "Read-only file system" (as it should).

How I'm testing:

umount the FS if it's auto mounted. Then doing a simple "sudo dd if=/dev/zero of=/dev/sda bs=512 count=1" to delete the MBR. This gives the error. So it's not a wrong/weird file system issue.

Once the SD reader has mounted a read-only card, you can never write to another card again until a reboot. reading is fine.

Booting to windows w/o touching the card, and writing is fine (assuming the card is in the unlocked position).

So maybe a driver and/or automount bug?

Any ideas on how to reset it w/ out having to reboot?

lshw just says the device is a "Mass storage device" and "Flash card Reader/Writer". The vendor is "Generic"

asked Nov 28 at 0:15

West_JR

New contributor

add a comment |

up vote
0
down vote

favorite

I'm having a project with the SD card reader (likely driver) for my Dell machine running 18.04.

If I ever insert a SD card in the "locked" position, any other SD card can not be written to regardless of the physical potion of the switch, until the next re-boot.

One odd thing, is if the switch on the card is unlocked, it says "Operation not permitted", but if it's locked it says "Read-only file system" (as it should).

How I'm testing:

umount the FS if it's auto mounted. Then doing a simple "sudo dd if=/dev/zero of=/dev/sda bs=512 count=1" to delete the MBR. This gives the error. So it's not a wrong/weird file system issue.

Once the SD reader has mounted a read-only card, you can never write to another card again until a reboot. reading is fine.

Booting to windows w/o touching the card, and writing is fine (assuming the card is in the unlocked position).

So maybe a driver and/or automount bug?

Any ideas on how to reset it w/ out having to reboot?

lshw just says the device is a "Mass storage device" and "Flash card Reader/Writer". The vendor is "Generic"

asked Nov 28 at 0:15

West_JR

New contributor

add a comment |

up vote
0
down vote

favorite

I'm having a project with the SD card reader (likely driver) for my Dell machine running 18.04.

If I ever insert a SD card in the "locked" position, any other SD card can not be written to regardless of the physical potion of the switch, until the next re-boot.

One odd thing, is if the switch on the card is unlocked, it says "Operation not permitted", but if it's locked it says "Read-only file system" (as it should).

How I'm testing:

umount the FS if it's auto mounted. Then doing a simple "sudo dd if=/dev/zero of=/dev/sda bs=512 count=1" to delete the MBR. This gives the error. So it's not a wrong/weird file system issue.

Once the SD reader has mounted a read-only card, you can never write to another card again until a reboot. reading is fine.

Booting to windows w/o touching the card, and writing is fine (assuming the card is in the unlocked position).

So maybe a driver and/or automount bug?

Any ideas on how to reset it w/ out having to reboot?

lshw just says the device is a "Mass storage device" and "Flash card Reader/Writer". The vendor is "Generic"

asked Nov 28 at 0:15

West_JR

New contributor

I'm having a project with the SD card reader (likely driver) for my Dell machine running 18.04.

If I ever insert a SD card in the "locked" position, any other SD card can not be written to regardless of the physical potion of the switch, until the next re-boot.

One odd thing, is if the switch on the card is unlocked, it says "Operation not permitted", but if it's locked it says "Read-only file system" (as it should).

How I'm testing:

umount the FS if it's auto mounted. Then doing a simple "sudo dd if=/dev/zero of=/dev/sda bs=512 count=1" to delete the MBR. This gives the error. So it's not a wrong/weird file system issue.

Once the SD reader has mounted a read-only card, you can never write to another card again until a reboot. reading is fine.

Booting to windows w/o touching the card, and writing is fine (assuming the card is in the unlocked position).

So maybe a driver and/or automount bug?

Any ideas on how to reset it w/ out having to reboot?

lshw just says the device is a "Mass storage device" and "Flash card Reader/Writer". The vendor is "Generic"

drivers sd-card

asked Nov 28 at 0:15

West_JR

New contributor

asked Nov 28 at 0:15

West_JR

New contributor

asked Nov 28 at 0:15

West_JR

New contributor

asked Nov 28 at 0:15

West_JR

asked Nov 28 at 0:15

West_JR

New contributor

West_JR is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment |

active

oldest

votes

Your Answer

StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "89"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});

function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});

}
});

West_JR is a new contributor. Be nice, and check out our Code of Conduct.

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2faskubuntu.com%2fquestions%2f1096654%2fall-sd-card-mounts-read-only-after-mounting-locked-card%23new-answer', 'question_page');
}
);

Post as a guest

Name

Required, but never shown

active

oldest

votes

West_JR is a new contributor. Be nice, and check out our Code of Conduct.

draft saved

draft discarded

West_JR is a new contributor. Be nice, and check out our Code of Conduct.

Thanks for contributing an answer to Ask Ubuntu!

Please be sure to answer the question. Provide details and share your research!

But avoid …

Asking for help, clarification, or responding to other answers.

Making statements based on opinion; back them up with references or personal experience.

To learn more, see our tips on writing great answers.

Some of your past answers have not been well-received, and you're in danger of being blocked from answering.

Please pay close attention to the following guidance:

Please be sure to answer the question. Provide details and share your research!

But avoid …

Asking for help, clarification, or responding to other answers.

Making statements based on opinion; back them up with references or personal experience.

To learn more, see our tips on writing great answers.

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Name

Required, but never shown

Name

Required, but never shown

This page is only for reference, If you need detailed information, please check here

搜尋此網誌

Cfxtrjtrk