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Re: What's the device name of my microSD card?




On 4/21/19 8:05 PM, David Wright wrote:
On Sun 21 Apr 2019 at 18:30:28 (+0000), Erik Josefsson wrote:
On 4/21/19 6:14 PM, Patrick Wiseman wrote:
 From the command line, 'df' returns free disk space and lists all
mounted devices by device name. (One of probably many ways to do
it!)
On 4/21/19 6:17 PM, Paul Sutton wrote:
if you run lsblk it will list devices connected to the system
Here's the output of both commands, not sure I can figure out which
one(s) is(are) my usb-Generic_STORAGE_DEVICE (i.e. a microSD put into
a USB-thingie):

debian@hamlet:~$ df
Filesystem     1K-blocks     Used Available Use% Mounted on
udev              961108        0    961108   0% /dev
tmpfs             201708     3260    198448   2% /run
/dev/mmcblk0p2  61214500 11372112  47335168  20% /
tmpfs            1008520    50808    957712   6% /dev/shm
tmpfs               5120        0      5120   0% /run/lock
tmpfs            1008520        0   1008520   0% /sys/fs/cgroup
tmpfs            1008520        8   1008512   1% /tmp
tmpfs            1008520        0   1008520   0% /var/tmp
/dev/mmcblk0p1    202277    48430    143403  26% /boot
tmpfs             201704       24    201680   1% /run/user/1000

debian@hamlet:~$ lsblk
NAME         MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda            8:0    1 29.7G  0 disk
└─sda1         8:1    1 29.7G  0 part
mmcblk0      179:0    0 59.5G  0 disk
├─mmcblk0p1  179:1    0  204M  0 part /boot
└─mmcblk0p2  179:2    0 59.3G  0 part /
mmcblk2      179:256  0 13.8G  0 disk
├─mmcblk2p1  179:257  0   50M  0 part
└─mmcblk2p2  179:258  0 13.7G  0 part
mmcblk2boot0 179:512  0   16M  1 disk
mmcblk2boot1 179:768  0   16M  1 disk


When I'm at it, here's the full ls completion from ls -al /dev/disk/by-id

debian@hamlet:~$ ls -al /dev/disk/by-id/
mmc-R1J56L_0x7da477d7
mmc-R1J56L_0x7da477d7-part1
mmc-R1J56L_0x7da477d7-part2
mmc-SN64G_0x3376cd3a
mmc-SN64G_0x3376cd3a-part1
mmc-SN64G_0x3376cd3a-part2
usb-Generic_STORAGE_DEVICE_000000001532-0:0
usb-Generic_STORAGE_DEVICE_000000001532-0:0-part1
I don't understand this output from   ls -al   as the -l switch should
show a lot more information, viz:

Indeed, I only pasted completion, not the output. Apologies.

Here's the output:

debdebian@hamlet:/dev/disk/by-id$ ls -al
total 0
drwxr-xr-x 2 root root 200 Apr 21 17:22 .
drwxr-xr-x 7 root root 140 Apr 21 17:22 ..
lrwxrwxrwx 1 root root  13 Apr 21 17:22 mmc-R1J56L_0x7da477d7 -> ../../mmcblk2 lrwxrwxrwx 1 root root  15 Apr 21 17:22 mmc-R1J56L_0x7da477d7-part1 -> ../../mmcblk2p1 lrwxrwxrwx 1 root root  15 Apr 21 17:22 mmc-R1J56L_0x7da477d7-part2 -> ../../mmcblk2p2 lrwxrwxrwx 1 root root  13 Apr 21 17:22 mmc-SN64G_0x3376cd3a -> ../../mmcblk0 lrwxrwxrwx 1 root root  15 Apr 21 17:22 mmc-SN64G_0x3376cd3a-part1 -> ../../mmcblk0p1 lrwxrwxrwx 1 root root  15 Apr 21 17:22 mmc-SN64G_0x3376cd3a-part2 -> ../../mmcblk0p2 lrwxrwxrwx 1 root root   9 Apr 21 17:22 usb-Generic_STORAGE_DEVICE_000000001532-0:0 -> ../../sda lrwxrwxrwx 1 root root  10 Apr 21 17:22 usb-Generic_STORAGE_DEVICE_000000001532-0:0-part1 -> ../../sda1


lrwxrwxrwx 1 root root 13 Apr 21 14:52 mmc-SD01G_0x00c2ed5b -> ../../mmcblk0
lrwxrwxrwx 1 root root 15 Apr 21 14:52 mmc-SD01G_0x00c2ed5b-part1 -> ../../mmcblk0p1

which is showing my SD card out of a digital camera.

Yes, looks the same.



The first line is the card itself, the second is a single partition
containing a FAT16 filesystem.

Thanks for your explanation, it's getting clearer that "disk" (from lsblk) is the same as "device name" (as asked for in the instructions) and what you call "the card itself".


The names you're quoting should be symbolic links created by udev, and
they should point to the /dev names assigned by the kernel.

It's the usb-Generic storage I want to copy the gz image to.
Your instructions would appear to write to the whole device, which is
quite normal. The image itself will contain any partitioning required.
In my case, that would be to /dev/mmcblk0. It looks like you have more
choice, so take care.


I now think I should copy to /dev/disk/by-id/sda, but I will sleep on it!



Cheers,
David.

Thank you David.

And thanks to everybody.

//Erik