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).