USB stick shows totally different size in lsblk and fdisk output

ramwoolf · 2023-02-07 21:49:50

I have USB stick 16Gb.
lsblk shows that:

NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
...
sdb       8:16          1      14.6G  0 disk

But fdisk shows, that only 3.8 Gb are available for partition creation
There are any partitions now.
Before there were two ones - EFI and Ubuntu. I tried to erase them by dd from /dev/zero - but it have written 3.8Gb as well (of=/dev/sdb, no mounted partition was)

I suspect - the previous partitions erased bad and new table created not in the begin of disk space
So, how can I retrieve all disk space for usage?

seth · 2023-02-07 22:59:12

But fdisk shows

Please don't paraphrase, https://bbs.archlinux.org/viewtopic.php?id=57855

I suspect - the previous partitions erased bad and new table created not in the begin of disk space

does not fit

erase them by dd from /dev/zero - but it have written 3.8Gb as well (of=/dev/sdb, no mounted partition was)

Unplug the usb key, run "dmesg -w", re-plug it and post the dmesg tail.
Also the entire fdisk output on it.

Brace yourself for the key to have died.

ramwoolf · 2023-02-07 23:29:42

dmesg output:

[108022.255406] usb 1-2: new high-speed USB device number 38 using xhci_hcd
[108022.403477] usb 1-2: New USB device found, idVendor=8564, idProduct=1000, bcdDevice= 1.00
[108022.403495] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[108022.403503] usb 1-2: Product: Mass Storage Device
[108022.403509] usb 1-2: Manufacturer: JetFlash
[108022.403515] usb 1-2: SerialNumber: HBF0V2LH
[108022.406248] usb-storage 1-2:1.0: USB Mass Storage device detected
[108022.407115] scsi host2: usb-storage 1-2:1.0
[108023.427822] scsi 2:0:0:0: Direct-Access     JetFlash Transcend 16GB   8.07 PQ: 0 ANSI: 4
[108023.430106] sd 2:0:0:0: [sdb] 30523392 512-byte logical blocks: (15.6 GB/14.6 GiB)
[108023.430926] sd 2:0:0:0: [sdb] Write Protect is off
[108023.430947] sd 2:0:0:0: [sdb] Mode Sense: 23 00 00 00
[108023.431997] sd 2:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[108023.436969]  sdb:
[108023.437077] sd 2:0:0:0: [sdb] Attached SCSI removable disk

fdisk output. I have created one partition, but total size still wrong

# fdisk -l /dev/sdb
Disk /dev/sdb: 3.81 GiB, 4087939072 bytes, 7984256 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: gpt
Disk identifier: 048F0033-6262-4F8A-A016-933E0925939B

Device     Start     End Sectors  Size Type
/dev/sdb1   2048 2097151 2095104 1023M Microsoft basic data

seth · 2023-02-08 07:26:21

[108023.430106] sd 2:0:0:0: [sdb] 30523392 512-byte logical blocks: (15.6 GB/14.6 GiB)

There isn't any more output, esp. not when trying to run fdisk or dd onto it?

ramwoolf · 2023-02-08 09:15:54

No, for fdisk that's it.

There is that output when I try to record zeroes

$ sudo dd if=/dev/zero of=/dev/sdb status=progress conv=fdatasync
3897565184 bytes (3.9 GB, 3.6 GiB) copied, 14 s, 278 MB/s
dd: writing to '/dev/sdb': No space left on device
7984257+0 records in
7984256+0 records out
4087939072 bytes (4.1 GB, 3.8 GiB) copied, 14.7088 s, 278 MB/s

seth · 2023-02-08 15:47:37

No, for fdisk that's it.

No, whether running fdisk or dd triggers more dmesg output.

However:

seth wrote:

Brace yourself for the key to have died.

There probably 4 4GB chips inside, the 2nd (or indeed 3 of them) no longer responds.
This is now a 4GB usb key and I'd not trust it beyond carrying movies that you illegally downloaded from the internet onto your computer to your Tv.

ramwoolf · 2023-02-12 12:43:13

So, finally the problem is resolved just by reboot of laptop. After that fdisk had shown correct info
Anyway, thanks for helping

seth · 2023-02-12 14:53:25

Did you update the kernel and not reboot before this happened?
Is there a parallel windows installation?

Unless you can explain this behavior, I'd be weary to trust the device.

Please always remember to mark resolved threads by editing your initial posts subject - so others will know that there's no task left, but maybe a solution to find.
Thanks.

Arch Linux

#1 2023-02-07 21:49:50

USB stick shows totally different size in lsblk and fdisk output

#2 2023-02-07 22:59:12

Re: USB stick shows totally different size in lsblk and fdisk output

#3 2023-02-07 23:29:42

Re: USB stick shows totally different size in lsblk and fdisk output

#4 2023-02-08 07:26:21

Re: USB stick shows totally different size in lsblk and fdisk output

#5 2023-02-08 09:15:54

Re: USB stick shows totally different size in lsblk and fdisk output

#6 2023-02-08 15:47:37

Re: USB stick shows totally different size in lsblk and fdisk output

#7 2023-02-12 12:43:13

Re: USB stick shows totally different size in lsblk and fdisk output

#8 2023-02-12 14:53:25

Re: USB stick shows totally different size in lsblk and fdisk output

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