LinuxQuestions.org - USB not detected?

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USB not detected?

Hello,

My USB stick is not being detected. I don't know if it is partitioned or not, and do not know what kind of file system it has.

The USB is a Cruzer Edge 16GB.
With it connected, the output for various commands are as follows:

lsblk

Code:

NAME  MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT

sda      8:0    0 298.1G  0 disk 

└─sda1  8:1    0 298.1G  0 part /

sr0    11:0    1  1024M  0 rom

lsusb

Code:

Bus 002 Device 003: ID 17ef:1003 Lenovo Integrated Smart Card Reader

Bus 002 Device 008: ID 0781:556b SanDisk Corp. Cruzer Edge

Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub

Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 001 Device 004: ID 0a5c:217f Broadcom Corp. BCM2045B (BDC-2.1)

Bus 001 Device 003: ID 147e:2016 Upek Biometric Touchchip/Touchstrip Fingerprint Sensor

Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

fdisk -l

Code:

Disk /dev/sda: 298.1 GiB, 320072933376 bytes, 625142448 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: 0xb707527d



Device    Boot Start      End  Sectors  Size Id Type

/dev/sda1  *    2048 625141759 625139712 298.1G 83 Linux

Does anybody know how I can resolve this problem without using any GTK+ utilities such as GNOME Disks, as I currently have an issue with the "canberra-gtk-module" [https://www.linuxquestions.org/quest...le-4175624805/].

Thanks in advance!
Bill

Start from beginning, is USB storage kernel module loaded?

Thanks for the reply Emerson,

lsmod

Code:

Module                  Size  Used by

nls_iso8859_1          16384  0

nls_cp437              20480  0

vfat                  20480  0

fat                    77824  1 vfat

ccm                    20480  3

fuse                  118784  3

snd_hda_codec_hdmi    57344  1

snd_hda_codec_conexant    24576  1

btusb                  53248  0

intel_powerclamp      16384  0

coretemp              16384  0

btrtl                  16384  1 btusb

kvm_intel            229376  0

snd_hda_codec_generic    86016  1 snd_hda_codec_conexant

kvm                  704512  1 kvm_intel

btbcm                  16384  1 btusb

mei_wdt                16384  0

joydev                24576  0

btintel                16384  1 btusb

bluetooth            634880  5 btrtl,btintel,btbcm,btusb

wmi_bmof              16384  0

mousedev              24576  0

irqbypass              16384  1 kvm

snd_hda_intel          45056  0

snd_hda_codec        151552  4 snd_hda_intel,snd_hda_codec_conexant,snd_hda_codec_hdmi,snd_hda_codec_generic

snd_hda_core          94208  5 snd_hda_intel,snd_hda_codec_conexant,snd_hda_codec,snd_hda_codec_hdmi,snd_hda_codec_generic

snd_hwdep              20480  1 snd_hda_codec

ecdh_generic          24576  1 bluetooth

crct10dif_pclmul      16384  0

arc4                  16384  2

crc32_pclmul          16384  0

snd_pcm              135168  4 snd_hda_intel,snd_hda_codec,snd_hda_core,snd_hda_codec_hdmi

ghash_clmulni_intel    16384  0

snd_timer              36864  1 snd_pcm

iwldvm                270336  0

mac80211              909312  1 iwldvm

pcbc                  16384  0

mxm_wmi                16384  0

iwlwifi              315392  1 iwldvm

cfg80211              741376  3 iwlwifi,mac80211,iwldvm

iTCO_wdt              16384  0

iTCO_vendor_support    16384  1 iTCO_wdt

aesni_intel          188416  2

psmouse              167936  0

aes_x86_64            20480  1 aesni_intel

crypto_simd            16384  1 aesni_intel

glue_helper            16384  1 aesni_intel

pcspkr                16384  0

mei_me                45056  1

i915                1921024  18

cryptd                28672  3 crypto_simd,ghash_clmulni_intel,aesni_intel

thinkpad_acpi          98304  1

intel_cstate          16384  0

intel_uncore          131072  0

nvram                  16384  1 thinkpad_acpi

input_leds            16384  0

rfkill                28672  5 bluetooth,thinkpad_acpi,cfg80211

mei                  106496  3 mei_me,mei_wdt

ac                    16384  0

snd                    98304  9 snd_hda_intel,snd_hwdep,snd_hda_codec_conexant,snd_hda_codec,snd_timer,thinkpad_acpi,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_pcm

soundcore              16384  1 snd

intel_ips              24576  0

drm_kms_helper        200704  1 i915

i2c_i801              32768  0

drm                  466944  8 i915,drm_kms_helper

e1000e                282624  0

syscopyarea            16384  1 drm_kms_helper

sysfillrect            16384  1 drm_kms_helper

sysimgblt              16384  1 drm_kms_helper

fb_sys_fops            16384  1 drm_kms_helper

i2c_algo_bit          16384  1 i915

ptp                    20480  1 e1000e

wmi                    28672  2 wmi_bmof,mxm_wmi

shpchp                40960  0

tpm_tis                16384  0

tpm_tis_core          20480  1 tpm_tis

evdev                  20480  13

tpm                    65536  2 tpm_tis,tpm_tis_core

battery                20480  0

pps_core              20480  1 ptp

lpc_ich                28672  0

mac_hid                16384  0

intel_agp              24576  0

intel_gtt              24576  2 intel_agp,i915

agpgart                49152  3 intel_agp,intel_gtt,drm

rtc_cmos              24576  1

acpi_cpufreq          24576  1

sg                    40960  0

ip_tables              28672  0

x_tables              45056  1 ip_tables

ext4                  712704  1

crc16                  16384  2 bluetooth,ext4

mbcache                16384  1 ext4

jbd2                  122880  1 ext4

fscrypto              32768  1 ext4

sr_mod                28672  0

cdrom                  69632  1 sr_mod

sd_mod                61440  2

mmc_block              40960  0

serio_raw              16384  0

atkbd                  32768  0

libps2                16384  2 atkbd,psmouse

ahci                  40960  1

libahci                40960  1 ahci

libata                278528  2 ahci,libahci

sdhci_pci              32768  0

crc32c_intel          24576  0

sdhci                  53248  1 sdhci_pci

ehci_pci              16384  0

led_class              16384  4 sdhci,input_leds,thinkpad_acpi,iwldvm

ehci_hcd              94208  1 ehci_pci

scsi_mod              258048  4 sd_mod,libata,sr_mod,sg

mmc_core              172032  3 sdhci,sdhci_pci,mmc_block

usbcore              286720  3 ehci_hcd,btusb,ehci_pci

usb_common            16384  1 usbcore

i8042                  32768  0

serio                  28672  7 serio_raw,atkbd,psmouse,i8042

I am not too sure what you mean by "USB storage kernal module" (hence why I am posting in Newbie section), but these are the modules.

From the lsusb command, the USB is detected, however, in Xfce File Manager, it does not appear. Nor does it appear under the lsblk command.

Thanks for the help!

The kernel module to access USB block devices is called usb_storage, I do not see it loaded. I'd try and load it by hand and check if fdisk shows your drive afterwards.

Thanks for the reply Emerson,

How do I do this from the terminal?
I've been through Arch Linux boot camp (i.e. the installation), however I don't know too many other unrelated commands.

Cheers!

modprobe usb_storage

Code:

modprobe: FATAL: Module usb_storage not found in directory /lib/modules/4.15.3-2-ARCH

Have you looked at the output of the dmesg command to see if the drive is being recognized?

Assuming you are running a stock kernel SCSI-Support, SCSI-Disk-Support and usb_storage are compiled in so it isn't a loadable module.

Thanks, michaelk. The only non-Gentoo Linux I have here is Mint and it has usb_storage as module.

I don't have that module in CentOS.

Firstly, have you tried using more than one USB port? Can you try the stick on another computer?

The fact that it's not being mounted doesn't necessarily mean it's not being found. Plug it in, start gparted, and see if that program can find /dev/sdb.

It does appear something is amiss. Try ls /dev/sd*. As also mentioned, try different usb ports. Try different computers. Seriously, if it won't show up in /dev, that's a bad sign. If you're using a laptop, make sure it's plugged into the AC outlet. Most laptops supply less power to the USB ports when running on battery power. The Sandisk Cruz might require more power than that.