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




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:

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.

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

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.

Cheers,
David.