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Note 4: SD Card Became Unreadable by Note After Mounting on PC under Windows 7?

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  Note 4: SD Card Became Unreadable by Note After Mounting on PC under Windows 7? "(PeteCresswell)" <x@y.Invalid> - 2018-08-25 09:49 -0400
    Re: Note 4: SD Card Became Unreadable by Note After Mounting on PC under Windows 7? The Real Bev <bashley101@gmail.com> - 2018-08-25 09:59 -0700
      Re: Note 4: SD Card Became Unreadable by Note After Mounting on PC under Windows 7? Daniel James <daniel@me.invalid> - 2018-08-26 17:29 +0100
      Re: Note 4: SD Card Became Unreadable by Note After Mounting on PC under Windows 7? "(PeteCresswell)" <x@y.Invalid> - 2018-08-26 12:47 -0400
        Re: Note 4: SD Card Became Unreadable by Note After Mounting on PC under Windows 7? Charlie+ <charlie@xxx.net> - 2018-08-27 07:44 +0100
        Re: Note 4: SD Card Became Unreadable by Note After Mounting on PC under Windows 7? Daniel James <daniel@me.invalid> - 2018-08-27 17:00 +0100
      Re: Note 4: SD Card Became Unreadable by Note After Mounting on PC under Windows 7? Eric Pozharski <whynot@pozharski.name> - 2018-08-26 18:14 +0300
        Re: Note 4: SD Card Became Unreadable by Note After Mounting on PC under Windows 7? "(PeteCresswell)" <x@y.Invalid> - 2018-08-26 19:35 -0400
    Re: Note 4: SD Card Became Unreadable by Note After Mounting on PC under Windows 7? Daniel James <daniel@me.invalid> - 2018-08-26 17:29 +0100

#55121 — Note 4: SD Card Became Unreadable by Note After Mounting on PC under Windows 7?

- Removed the 128-gig micro-SD card from my Samsung Note4 
  (SM-910C, Android 5.0.1)
- Put it into a USB adapter on my Windows-7 PC
- Backed it up to the PC
- Put it back into the Note 4
- Note 4 does not seem to be able to read the card
- Apps that use data on the card seem to hang when
  I try to open them.
- Other apps and the phone in general seem to be
  hung too after the card has been in there for
  a few minutes - only way to re-boot the phone 
  is to do a battery pull 
- I've done the Shut down phone, remove SD card,
  restart phone, Settings | System | Storage | Mount
  SD Card thing during the window between
  rebooting and total system lockup - but no luck.
- When I put the SD card back in the USB adapter and
  plug it into my PC, no problem - all the files are
  there and Windows seems 100% happy.

Unencumbered by any real knowledge, the only two things
I can think of are:

- Windows has done some little thing to the SD card
  that makes Android choke on it

- Android needs to go through some one-time scanning/validation
  process when the card returns to it's home - and that
  process takes a looooong time and takes so much of
  some resource that the system seems to hang.... But
  I have tried leaving it in that state for at least an
  hour and no luck.

Anybody else been here?

-- 
Pete Cresswell
-- 
Pete Cresswell

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#55128

On 08/25/2018 06:49 AM, (PeteCresswell) wrote:
> - Removed the 128-gig micro-SD card from my Samsung Note4
>    (SM-910C, Android 5.0.1)
> - Put it into a USB adapter on my Windows-7 PC
> - Backed it up to the PC
> - Put it back into the Note 4
> - Note 4 does not seem to be able to read the card
> - Apps that use data on the card seem to hang when
>    I try to open them.
> - Other apps and the phone in general seem to be
>    hung too after the card has been in there for
>    a few minutes - only way to re-boot the phone
>    is to do a battery pull
> - I've done the Shut down phone, remove SD card,
>    restart phone, Settings | System | Storage | Mount
>    SD Card thing during the window between
>    rebooting and total system lockup - but no luck.
> - When I put the SD card back in the USB adapter and
>    plug it into my PC, no problem - all the files are
>    there and Windows seems 100% happy.

Was the phone all the way off when you removed the card?  I don't think 
phones have hot-plug capability.

Did you use some Windows thing for the backup that might have written a 
file to the card ("Backup completed 8/25/18" or equivalent) or changed 
it in some other way?  Find the newest file on the card and check.  Look 
at the invisible files too.  Can you tell if any of the permissions changed?

> Unencumbered by any real knowledge, the only two things
> I can think of are:
>
> - Windows has done some little thing to the SD card
>    that makes Android choke on it
>
> - Android needs to go through some one-time scanning/validation
>    process when the card returns to it's home - and that
>    process takes a looooong time and takes so much of
>    some resource that the system seems to hang.... But
>    I have tried leaving it in that state for at least an
>    hour and no luck.

If it was doing that surely it would have thrown up some sort of 
message.  Or it should have :-(

> Anybody else been here?

Nope, just flailing.  Works maybe 1/2 of the time :-)


-- 
Cheers, Bev
      "To turn is to admit defeat."   -- Hugh Grierson

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#55155

In article <pls1te$k30$1@dont-email.me>, The Real Bev wrote:
> Was the phone all the way off when you removed the card?  I don't
> think phones have hot-plug capability.

Good call ... phones only have a sort of "warm plug" capability.

One should either "safely remove" the card from the phone by unmounting 
it (via "Settings" and "Storage") or turn the phone off before removing 
the card.

-- 
Cheers,
 Daniel.
 

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#55156

Per The Real Bev:
>Was the phone all the way off when you removed the card?  I don't think 
>phones have hot-plug capability.

Whenever I insert or remove an SD card, I pull the battery first.

Windows Chkdsk says the file structure is OK, but the card comes up as
write-protected no matter what I do.

Did the DISKPART | ... | attrib disk clear readonly and it returned
"Disk attributes cleared successfully", but Windows still thinks it's
ReadOnly.

To me, that seems to argue for a damaged card - whether soft or hard...

Restored the contents to another SD card, put the card into the Note 4 and it
works a-ok.

My agenda right now is to forget about why this happened and just concentrate
on formatting the card - in hopes that formatting and then restoring the data
will give me a card that works.

OTOH, maybe I should stop being so cheap and just drop forty bucks on a new
card.... -)
-- 
Pete Cresswell

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#55169

On Sun, 26 Aug 2018 12:47:51 -0400, "(PeteCresswell)" <x@y.Invalid>
wrote as underneath :

snip
>
>OTOH, maybe I should stop being so cheap and just drop forty bucks on a new
>card.... -)

Another possibility is you may have a faked capacity SD card, there are
millions of them out there! C+

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#55175

In article <v1m5odd4880349m2jr3begt38id879g8me@4ax.com>, 
(PeteCresswell) wrote:
> Whenever I insert or remove an SD card, I pull the battery first.

That shouldn't be necessary ... but if you are doing that I hope you 
are performing an orderly shut-down of Android first.

It's not that just pulling the battery will necessarily break anything 
-- these things are designed to be fairly resilient, as people do drop 
phones and have the battery spring out -- just that if the phone hasn't 
been shut down properly when  the power is removed there are many 
things that just might go wrong.

-- 
Cheers,
 Daniel.
 

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#55157

with <pls1te$k30$1@dont-email.me> The Real Bev wrote:
> On 08/25/2018 06:49 AM, (PeteCresswell) wrote:

>> - Removed the 128-gig micro-SD card from my Samsung Note4
>>    (SM-910C, Android 5.0.1)
>> - Put it into a USB adapter on my Windows-7 PC
>> - Backed it up to the PC
>> - Put it back into the Note 4
>> - Note 4 does not seem to be able to read the card
>> - Apps that use data on the card seem to hang when
>>    I try to open them.
>> - Other apps and the phone in general seem to be
>>    hung too after the card has been in there for
>>    a few minutes - only way to re-boot the phone
>>    is to do a battery pull
>> - I've done the Shut down phone, remove SD card,
>>    restart phone, Settings | System | Storage | Mount
>>    SD Card thing during the window between
>>    rebooting and total system lockup - but no luck.
>> - When I put the SD card back in the USB adapter and
>>    plug it into my PC, no problem - all the files are
>>    there and Windows seems 100% happy.
> Was the phone all the way off when you removed the card?  I don't
> think phones have hot-plug capability.

Due to design of my last two phones I can't confirm that thing
(hot-plug) hasn't been dropped, but my first phone could do this. With a
quirk -- screen must be lit, but I kept it in settings/storage section
anyway, because...

IIRC twice I've experienced same behaviour (sdcard was used as
transport, due phone being too old for The Modern Technologies(TM) (like
org.primftpd)).  First time I was frustrated but I've shortly learned
that fsck.vfat is Like A Charm(TM).  Also my old phone at least once did
that corruption just flying by.

What brings us to a question:  PeteCresswell, you're unmounting
removables before pulling, aren't you?

*CUT*

p.s.  What can I say, vfat -- braindead filesystem by design.

-- 
Torvalds' goal for Linux is very simple: World Domination
Stallman's goal for GNU is even simpler: Freedom

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#55162

Per Eric Pozharski:
>What brings us to a question:  PeteCresswell, you're unmounting
>removables before pulling, aren't you?

No - and I suspect you may have put your finger on it.

My last act was to replace the
(unformattable-by-Windows-because-it-was-locked) SD card into the phone and
try to format it there.

Format did not work... but then I told it to UnMount the SD card.

Left it for an hour or so and it finally came up as UnMounted.

Now it gets fun:  with the phone thinking the card is "UnMounted", was
working a-ok.

Now it's several hours later and I just checked: Settings | System | Storage
| SD Card now says it is, by implication, mounted - because "Unmount SD card"
now shows as an option.

I guess I *should* try formatting it in Windows or at least deleting a file
under Windows... but it's working now and there's no way I'm going to touch
it until my new phone arrives.

Once I have the new phone config'd and running, I'll revisit the old one and
it's "UnMounted" SD card.

My takeaway so far: do a Settings | System | Storage | Unmount SD Card before
removing the SD card.
-- 
Pete Cresswell

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#55154

In article <3hn2odl1jamrei9jagc2sqf46fi8ce4sbd@4ax.com>, 
(PeteCresswell) wrote:
> - Removed the 128-gig micro-SD card from my Samsung Note4 
>   (SM-910C, Android 5.0.1)

As noted in my reply to Bev, you should go into "Settings" and select 
"Storage" and explicitly unmount the card before removing it.

Either that or turn the phone off first.

If you don't do one of those things you risk corrupting the filesystem 
of the card by removing it while write operations are pending. (It's a 
small risk as accidents do happen, but it's real.)

> - Put it back into the Note 4
> - Note 4 does not seem to be able to read the card

Has the Note 4 mounted the card? Go into "Settings" and then "Storage" 
and see what it says. It may show that the card is unmounted, and give 
you the option to mount it. If it thinks the card is mounted try 
unmounting it and then remounting it.

Alternatively, turn the phone off before re-inserting the card, as 
Android will normally mount external filesystems automatically during 
startup.

Does that help?

-- 
Cheers,
 Daniel.
 

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