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Re: USB key and lost space

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Le vendredi 16 février 2018, 12:03:56 CET Thomas Schmitt a écrit :
> Hi,
> 
> Rodary Jacques wrote:
> > I did subscribe  in april 2016,
> 
> The mail header X-Spam-Status in your mail to the list does not contain
> the test "LDOSUBSCRIBER". So currently your address rodaryj@free.fr is
> not subscribed.
> 
> Consider to subscribe again and also to Cc: the debian-user list with
> your replies.
> 
> 
> > Where am I supposed to find firmware.tar.gz. It may be a very stupid
> > question, I was used with .iso  image disks only.
> 
> Other people on debian-user probably have more experience with that.
> I have to google.
> For the current Debian release 9 "stretch" it is probably on
>   https://cdimage.debian.org/cdimage/unofficial/non-free/firmware/stretch/current/
> 
> 
> I wrote:
> > > So use /sbin/fdisk to create partition 3.
> 
> > I used fdisk, cfdisk and partitionprobe and it seems my Key is  quite
> > useless now
> 
> Which ISO image did you put onto the USB stick ?
> 
> Let's give current netinst a try:
> 
>   $ dd if=debian-9.3.0-amd64-netinst.iso of=/dev/sdc bs=1M
>   ...
>   $ /sbin/fdisk /dev/sdc
>   ...
>   Command (m for help): p
>   ...
>   Device     Boot Start    End Sectors  Size Id Type
>   /dev/sdc1  *        0 593919  593920  290M  0 Empty
>   /dev/sdc2        3760   4591     832  416K ef EFI (FAT-12/16/32)
> 
>   Command (m for help): n
>   Partition type
>      p   primary (2 primary, 0 extended, 2 free)
>      e   extended (container for logical partitions)
>   Select (default p): p
>   Partition number (3,4, default 3): 3
>   First sector (593920-7864318, default 593920): 
>   Last sector, +sectors or +size{K,M,G,T,P} (593920-7864318, default 7864318): 
> 
>   Created a new partition 3 of type 'Linux' and of size 3.5 GiB.
> 
>   Command (m for help): p
>   Disk /dev/sdc: 3.8 GiB, 4026531328 bytes, 7864319 sectors
>   Units: sectors of 1 * 512 = 512 bytes
>   Sector size (logical/physical): 512 bytes / 512 bytes
>   I/O size (minimum/optimal): 512 bytes / 512 bytes
>   Disklabel type: dos
>   Disk identifier: 0x0347fd41
> 
>   Device     Boot  Start     End Sectors  Size Id Type
>   /dev/sdc1  *         0  593919  593920  290M  0 Empty
>   /dev/sdc2         3760    4591     832  416K ef EFI (FAT-12/16/32)
>   /dev/sdc3       593920 7864318 7270399  3.5G 83 Linux
> 
> 
>   Command (m for help): w
>   The partition table has been altered.
>   Calling ioctl() to re-read partition table.
>   Re-reading the partition table failed.: Permission denied
> 
> The final error message comes because i did this as normal user, just
> having rw-permission to /dev/sdc.
> I unplug and replug the USB stick to let the kernel assess the new
> partitioning:
> 
>   $ ls /dev/sdc*
>   /dev/sdc  /dev/sdc1  /dev/sdc2  /dev/sdc3
> 
> 
> > I will try dd, very carefully. to erase this new partition I finally
> > created, and perhaps come back to you afterwards.
> 
> I would just copy the ISO again onto the USB stick base device 
> and then run fdisk.
> 
> 
> Have a nice day :)
> 
> Thomas
Saturday:
	I don't quite know how, but with fdisk, cfdisk, parted,  partx and partprobe I now have a brand new key with 16 GB (or GiB),  the original size, without the iso file, type vfat (rw, nosuid, nodev, relatime, uid=1000, gid=1000, fmask=0022, dmask=0022, codepage=437, iocharset=ascii, shortname=mixed, showexec, utf8, flush,errors=remount-ro, uhelper=udisks2. I have three oher microSDHC to save!
Sunday:	 That was yesterday! Two of the microSDHC cards didn't resist to my assaults. But the one with netinst iso (with the two partitions)  seem to be much harder. 
	Tired of trying (fdisk cfdisk sfdisk parted failed with "read only disk"), I put the card in my camera to format it, successfully. 
	On a Mac, it is now known as "NIKON D7100" and is read-write, as on the camera. But on my Debian and Fedora boxes, if it recognized as such also, it stays read only: 'wipefs /dev/sde' continue to read:
offset               type 

which was the old  situation, mount says "/dev/sde1 on /media/jr/NIKON D7100 type vfat (ro, etc..." which is correct except for the ro! Same with the other tools.
	How can I force the kernel to forget this 'read only' on the disk? Could it be because of the external card reader I use?
	It is not really important, since I can use this card with my mac and to scan documents, but I like to understand.
	Jacques

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Re: USB key and lost space "Thomas Schmitt" <scdbackup@gmx.net> - 2018-02-16 12:10 +0100
  Re: USB key and lost space Rodary Jacques <rodaryj@free.fr> - 2018-02-18 20:50 +0100
    Re: USB key and lost space "Thomas Schmitt" <scdbackup@gmx.net> - 2018-02-19 08:40 +0100

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