PW4 kindle mounting read-only on linux mint system

[dhdurgee]

I am encountering a problem today that my pw4 is mounting read-only on my linux mint system. I have tried restarting the PW4, but that makes no difference. the mount command shows:

dhdurgee@z560:~/Downloads$ mount | grep /media/dhdurgee/Kindle
/dev/sdc on /media/dhdurgee/Kindle type vfat (ro,nosuid,nodev,relatime,uid=1000,gid=1000,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,showexec,utf8,flush,errors=remount-ro,uhelper=udisks2)
dhdurgee@z560:~/Downloads$

Needless to say this is causing a problem using Calibre to add books. How do I fix this?

I do have usbnet installed and can ssh to the pw4 if more information is available from there or if the fix can be done there.

Dave

[j.p.s]

The EMMC on your PW4 might be worn out.

You can try enabling USBnet, ssh to the kindle, and try touch on a new or existing file somewhere in /mnt/us

Also try mounting the root filesystem "/" rw and creating a new file in /etc/or somewhere.

[dhdurgee]

Originally Posted by j.p.s

The EMMC on your PW4 might be worn out.

You can try enabling USBnet, ssh to the kindle, and try touch on a new or existing file somewhere in /mnt/us

Also try mounting the root filesystem "/" rw and creating a new file in /etc/or somewhere.

I worked around this with a sftp mount of the kindle to which I was then able to copy the books using fcl.

I have not tried to use Calibre again with it plugged into the USB. Obviously I will do so the next time I want to copy a book over.

If it dosn't work at that time I guess I will check and see if there is a way for Calibre to use sftp to do its work.

Thanks for the suggestion.

Dave

[dhdurgee]

I am still encountering this problem and wondering how to correct it.

Will there be any messages logged on the PW4 when I plug it in that might clarify why it is only allowing a read-only mount? I have USBNetworking installed and can SSH into the PW4 over WiFi, so I should be able to issue commands to retrieve messages from the log.

Any help appreciated.

Dave

[j.p.s]

Originally Posted by dhdurgee

I am still encountering this problem and wondering how to correct it.

Will there be any messages logged on the PW4 when I plug it in that might clarify why it is only allowing a read-only mount? I have USBNetworking installed and can SSH into the PW4 over WiFi, so I should be able to issue commands to retrieve messages from the log.

Any help appreciated.

Dave

dmesg | tail

on both the kindle and your computer shortly after connecting them by USB might provide some clues.

I never put any of my kindles into USB mass storage mode and use scp to copy files in either direction.

With no USB connection, can you write to /mnt/us using an on kindle terminal or ssh?

[dhdurgee]

I finally got around to looking into this a bit more. I did ssh into the PW4 and confirmed that I could dmesg | tail there, but I found that after plugged in the USB connection that the session froze and I later got a "[root@kindle root]# client_loop: send disconnect: Broken pipe" and was unable to retrieve anything from there. Here is what I saw on the linux side:

dhdurgee@z560:~/Downloads$ dmesg | tail
[29683.225009] scsi host6: usb-storage 2-1.1:1.0
[29684.239152] scsi 6:0:0:0: Direct-Access     Kindle   Internal Storage 0401 PQ: 0 ANSI: 2
[29684.240379] sd 6:0:0:0: Attached scsi generic sg3 type 0
[29684.241729] sd 6:0:0:0: Power-on or device reset occurred
[29684.242626] sd 6:0:0:0: [sdc] Media removed, stopped polling
[29684.253800] sd 6:0:0:0: [sdc] 13090733 512-byte logical blocks: (6.70 GB/6.24 GiB)
[29684.466062] sd 6:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[29684.466120] sdc: detected capacity change from 0 to 13090733
[29684.466130] sd 6:0:0:0: [sdc] Attached SCSI removable disk
[29684.688948]  sdc:
[29785.419318] FAT-fs (sdc): error, corrupted directory (invalid entries)
[29785.419369] FAT-fs (sdc): Filesystem has been set read-only
[29786.926014] FAT-fs (sdc): error, corrupted directory (invalid entries)
dhdurgee@z560:~/Downloads$ dmesg | tail
[30026.765434] scsi 6:0:0:0: Direct-Access     Kindle   Internal Storage 0401 PQ: 0 ANSI: 2
[30026.766542] sd 6:0:0:0: Attached scsi generic sg3 type 0
[30026.767067] sd 6:0:0:0: Power-on or device reset occurred
[30026.767901] sd 6:0:0:0: [sdc] Media removed, stopped polling
[30026.776464] sd 6:0:0:0: [sdc] Attached SCSI removable disk
[30026.888270] sd 6:0:0:0: [sdc] 13090733 512-byte logical blocks: (6.70 GB/6.24 GiB)
[30027.109915] sd 6:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[30027.109952] sdc: detected capacity change from 0 to 13090733
[30027.111816]  sdc:
[30027.548698] FAT-fs (sdc): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.

The first delay was when I opened Calibre and received the read-only error. The second was when I unplugged in hope of getting the PW4 side and then plugged in again.

So it seems I have some corruption, which I assume should be fixed via the PW4 ssh terminal and not using fsck on linux. What is the appropriate command to issue there?

Dave

PS:

Taking a quick look at mounts on the PW4 I assume that /mnt/base-us is the system to check, but the appropriate options for the fsck command are needed.

[DNSB]

Not sure if this is installed on a Kindle but you could try:

sudo umount /dev/sdc

sudo dosfsck -t -a -w /dev/sdc

You may need to set the device name properly (sdc1 or whatever).

[dhdurgee]

I just did the following via ssh on the pw4:

[root@kindle root]# fsck.vfat /dev/loop/0
dosfsck 2.11, 12 Mar 2005, FAT32, LFN
Clearing dirty flag
Long filename fragment ":6eh:1BL:2bg:2ZI:E7v:9jb:4JF:DgE:B-j:FqH:2ot:EtR:81U" found outside a LFN sequence.
  (Maybe the start bit is missing on the last fragment)
1: Delete fragment
2: Leave it as it is.
3: Set start bit
? 2
/documents/Downloads/Items01/Holy Rebel_ Armed with Truth, Stand Your Ground, and Rebel Against Hell:20Ps Agenda._B0BM1XM884.sdr
  Has a large number of bad entries. (74/142)
Drop directory ? (y/n) n
/documents/Downloads/Items01/Holy Rebel_ Armed with Truth, Stand Your Ground, and Rebel Against Hell:20Ps Agenda._B0BM1XM884.sdr/��1\221���\227.'�\226
  Bad file name.
1) Drop file
2) Rename file
3) Auto-rename
4) Keep it
? 4
/documents/Downloads/Items01/Holy Rebel_ Armed with Truth, Stand Your Ground, and Rebel Against Hell:20Ps Agenda._B0BM1XM884.sdr/�\216�9pݷ\236.\221z�
  Bad file name.
1) Drop file
2) Rename file
3) Auto-rename
4) Keep it
? 4
/documents/Downloads/Items01/Holy Rebel_ Armed with Truth, Stand Your Ground, and Rebel Against Hell:20Ps Agenda._B0BM1XM884.sdr/�y���)�.`�j
  Bad file name.
1) Drop file
2) Rename file
3) Auto-rename
4) Keep it
? 4
/documents/Downloads/Items01/Holy Rebel_ Armed with Truth, Stand Your Ground, and Rebel Against Hell:20Ps Agenda._B0BM1XM884.sdr/�\234iX�̥\213.�@d
  Bad file name.
1) Drop file
2) Rename file
3) Auto-rename
4) Keep it
? 4
/documents/Downloads/Items01/Holy Rebel_ Armed with Truth, Stand Your Ground, and Rebel Against Hell:20Ps Agenda._B0BM1XM884.sdr/ٹS���B0.\202v�
  Bad file name.
1) Drop file
2) Rename file
3) Auto-rename
4) Keep it
? 4
/documents/Downloads/Items01/Holy Rebel_ Armed with Truth, Stand Your Ground, and Rebel Against Hell:20Ps Agenda._B0BM1XM884.sdr
  "." is missing. Can't fix this yet.
/documents/Downloads/Items01/Holy Rebel_ Armed with Truth, Stand Your Ground, and Rebel Against Hell:20Ps Agenda._B0BM1XM884.sdr
  ".." is missing. Can't fix this yet.
Leaving file system unchanged.
/dev/loop/0: 20752 files, 228014/817083 clusters
[root@kindle root]#

As you can see I took no action on any of these, as I want to be sure to take the proper ones.

How should I respond on my next pass to actually correct these various errors?

Dave

[dhdurgee]

Any input from anyone on the output from fsck.vfat /dev/loop/0 above? Should I simply add the "-a" option which is documented as:

       -a  Automatically repair the filesystem.  No user intervention is necessary.  Whenever there is more than one  method  to
           solve a problem, the least destructive approach is used.

Dave

[dhdurgee]

Given the lack of further assistance thus far I gave a try at this without success. Here is the results of my latest attempt:

dhdurgee@z560:~/Downloads$ ssh root@pw4


Welcome to Kindle!

[root@kindle root]# fsck.vfat /dev/loop/0
dosfsck 2.11, 12 Mar 2005, FAT32, LFN
Clearing dirty flag
Long filename fragment ":6eh:1BL:2bg:2ZI:E7v:9jb:4JF:DgE:B-j:FqH:2ot:EtR:81U" found outside a LFN sequence.
  (Maybe the start bit is missing on the last fragment)
1: Delete fragment
2: Leave it as it is.
3: Set start bit
? 1
/documents/Downloads/Items01/Holy Rebel_ Armed with Truth, Stand Your Ground, and Rebel Against Hell:20Ps Agenda._B0BM1XM884.sdr
  Has a large number of bad entries. (74/142)
Drop directory ? (y/n) y
Reclaimed 63 unused clusters (516096 bytes).
Free cluster summary wrong (598754 vs. really 598817)
1) Correct
2) Don't correct
? 1
Leaving file system unchanged.
/dev/loop/0: 20210 files, 218266/817083 clusters
[root@kindle root]# fsck.vfat -a /dev/loop/0
dosfsck 2.11, 12 Mar 2005, FAT32, LFN
Clearing dirty flag
Long filename fragment ":6eh:1BL:2bg:2ZI:E7v:9jb:4JF:DgE:B-j:FqH:2ot:EtR:81U" found outside a LFN sequence.
  (Maybe the start bit is missing on the last fragment)
  Not auto-correcting this.
Checksum in long filename part wrong (90 vs. expected 57).
  Not auto-correcting this.
/documents/Downloads/Items01/Holy Rebel_ Armed with Truth, Stand Your Ground, and Rebel Against Hell:20Ps Agenda._B0BM1XM884.sdr
  Has a large number of bad entries. (65/142)
  Not dropping it in auto-mode.
/documents/Downloads/Items01/Holy Rebel_ Armed with Truth, Stand Your Ground, and Rebel Against Hell:20Ps Agenda._B0BM1XM884.sdr
  "." is missing. Can't fix this yet.
/documents/Downloads/Items01/Holy Rebel_ Armed with Truth, Stand Your Ground, and Rebel Against Hell:20Ps Agenda._B0BM1XM884.sdr
  ".." is missing. Can't fix this yet.
Performing changes.
/dev/loop/0: 20214 files, 218329/817083 clusters
[root@kindle root]# fsck.vfat -a /dev/loop/0
dosfsck 2.11, 12 Mar 2005, FAT32, LFN
Long filename fragment ":6eh:1BL:2bg:2ZI:E7v:9jb:4JF:DgE:B-j:FqH:2ot:EtR:81U" found outside a LFN sequence.
  (Maybe the start bit is missing on the last fragment)
  Not auto-correcting this.
Checksum in long filename part wrong (90 vs. expected 57).
  Not auto-correcting this.
/documents/Downloads/Items01/Holy Rebel_ Armed with Truth, Stand Your Ground, and Rebel Against Hell:20Ps Agenda._B0BM1XM884.sdr
  Has a large number of bad entries. (65/142)
  Not dropping it in auto-mode.
/documents/Downloads/Items01/Holy Rebel_ Armed with Truth, Stand Your Ground, and Rebel Against Hell:20Ps Agenda._B0BM1XM884.sdr
  "." is missing. Can't fix this yet.
/documents/Downloads/Items01/Holy Rebel_ Armed with Truth, Stand Your Ground, and Rebel Against Hell:20Ps Agenda._B0BM1XM884.sdr
  ".." is missing. Can't fix this yet.
/dev/loop/0: 20214 files, 218329/817083 clusters
[root@kindle root]# fsck.vfat /dev/loop/0
dosfsck 2.11, 12 Mar 2005, FAT32, LFN
Long filename fragment ":6eh:1BL:2bg:2ZI:E7v:9jb:4JF:DgE:B-j:FqH:2ot:EtR:81U" found outside a LFN sequence.
  (Maybe the start bit is missing on the last fragment)
1: Delete fragment
2: Leave it as it is.
3: Set start bit
? 1
/documents/Downloads/Items01/Holy Rebel_ Armed with Truth, Stand Your Ground, and Rebel Against Hell:20Ps Agenda._B0BM1XM884.sdr
  Has a large number of bad entries. (74/142)
Drop directory ? (y/n) y
Reclaimed 63 unused clusters (516096 bytes).
Free cluster summary wrong (598754 vs. really 598817)
1) Correct
2) Don't correct
? 1
Leaving file system unchanged.
/dev/loop/0: 20210 files, 218266/817083 clusters
[root@kindle root]# exitConnection to pw4 closed.
dhdurgee@z560:~/Downloads$

What I find puzzling is I tell it to make corrections, yet it does NOT do so. I have also tried some work from my laptop while plugged in, specifically trying to delete the /documents/Downloads/Items01 sub-directory, without success. I don't even see the above referenced sub-directory, so I can't delete it only from there.

Further suggestions appreciated.

Dave

[j.p.s]

It seems to me that your kindle's internal flash memory is worn out.

[dhdurgee]

Originally Posted by j.p.s

It seems to me that your kindle's internal flash memory is worn out.

I would find that a more believable possibility if I were not able to mount the PW4 using sftp and then manually copy new books onto it which are completely accessible.

I am also able to keep current with magazine subscriptions via Kindle Unlimited.

Given I am able to add books in this manner the flash memory is obviously functioning. The puzzle is why does a USB mount result in problems and why can't fsck.vfat correct the problems.

Dave

[j.p.s]

Did you run fsck on the kindle or your PC? Running it on a mounted partition is a bad idea anytime, and it is my understanding that, at least in the case of a kindle, what shows up over usbfs is not the real partition.

[root@kindle root]# grep mmc /etc/fstab
/dev/mmcblk0p1    /             ext3   suid,exec,auto,nouser,async,rw,noatime,nodiratime 0      1
/dev/mmcblk1p1    /mnt/base-mmc vfat   defaults,noatime,nodiratime,utf8,noexec,shortname=mixed              0      0
fsp#/mnt/base-mmc /mnt/mmc      fuse   rw,max_write=65536,max_readahead=65536,noatime,exec,nosuid,nodev,nonempty     0      0
[root@kindle root]# grep mnt/us /etc/fstab
fsp#/mnt/base-us  /mnt/us       fuse   allow_other,umask=0,uid=0,gid=0,rw,max_write=65536,max_readahead=65536,noatime,noexec,nosuid,nodev,nonempty     0      0

/dev/mmcblk1p1 is the OS partition
/dev/mmcblk1p1 is the user store partition

Note the presence of the 2 fuse file systems.

If /dev/mmcblk1p1 is corrupted I guess you could disable usbfs by enabling usbnetworking and ssh in and unmount /mnt/us and /mnt/mmc and /mnt/base-mmc
then run fsck on /dev/mmcblk1p1

I have no idea how to run fsck on a fuse system.

[dhdurgee]

Originally Posted by j.p.s

Did you run fsck on the kindle or your PC? Running it on a mounted partition is a bad idea anytime, and it is my understanding that, at least in the case of a kindle, what shows up over usbfs is not the real partition.

[root@kindle root]# grep mmc /etc/fstab
/dev/mmcblk0p1    /             ext3   suid,exec,auto,nouser,async,rw,noatime,nodiratime 0      1
/dev/mmcblk1p1    /mnt/base-mmc vfat   defaults,noatime,nodiratime,utf8,noexec,shortname=mixed              0      0
fsp#/mnt/base-mmc /mnt/mmc      fuse   rw,max_write=65536,max_readahead=65536,noatime,exec,nosuid,nodev,nonempty     0      0
[root@kindle root]# grep mnt/us /etc/fstab
fsp#/mnt/base-us  /mnt/us       fuse   allow_other,umask=0,uid=0,gid=0,rw,max_write=65536,max_readahead=65536,noatime,noexec,nosuid,nodev,nonempty     0      0

/dev/mmcblk1p1 is the OS partition
/dev/mmcblk1p1 is the user store partition

Note the presence of the 2 fuse file systems.

If /dev/mmcblk1p1 is corrupted I guess you could disable usbfs by enabling usbnetworking and ssh in and unmount /mnt/us and /mnt/mmc and /mnt/base-mmc
then run fsck on /dev/mmcblk1p1

I have no idea how to run fsck on a fuse system.

I had looked through the mounts on the PW4 and found:

[root@kindle root]# mount | grep vfat
/dev/loop/0 on /mnt/base-us type vfat (rw,noexec,noatime,nodiratime,fmask=0000,dmask=0000,allow_utime=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro)
[root@kindle root]#

Given this I had been running my fsck.vfat on /dev/loop/o with the results you see above.

I get the following with the commands you used:

[root@kindle root]# grep mmc /etc/fstab
/dev/mmcblk0p1    /             ext3   suid,exec,auto,nouser,async,rw,noatime,nodiratime 0      1
/dev/mmcblk1p1    /mnt/base-mmc vfat   defaults,noatime,nodiratime,utf8,noexec,shortname=mixed              0      0
fsp#/mnt/base-mmc /mnt/mmc      fuse   rw,max_write=65536,max_readahead=65536,noatime,exec,nosuid,nodev,nonempty     0      0
[root@kindle root]# grep mnt/us /etc/fstab
fsp#/mnt/base-us  /mnt/us       fuse   allow_other,umask=0,uid=0,gid=0,rw,max_write=65536,max_readahead=65536,noatime,noexec,nosuid,nodev,nonempty,hard_remove     0      0

This appears to be identical, unless I am missing something.

I am using ssh via WiFi, so would it be sufficient to umount the three and then run the fsck.vfat?

Thank you for any further pointers you may have.

Dave

[j.p.s]

I don't know. I have no experience with running fsck on loop devices or fuse file systems, and have no idea what complicated scheme is used to map the /dev/mmcblk1p1 device eventually to /mnt/us