mkexfatfs doesn't work?

[Richard Shaw]

I just installed exfat-utils and I'm trying to format a 16GB microSD card:

$ sudo mkfs.exfat /dev/sdb1
mkexfatfs 1.3.0
Creating... done.
Flushing... done.
File system created successfully.

But it actually doesn't do anything. All the old files are still on the SD
card.

Thanks,
Richard

[sixpack13]

/dev/sdb1 still mounted ?

[Richard Shaw]

On Sat, Sep 21, 2019 at 12:19 PM sixpack13  wrote:
> /dev/sdb1 still mounted ?

Tried with and without with the same result. You'd expect it to error out
if it was.

Thanks,
Richard

[Tim]

On Sat, 2019-09-21 at 12:03 -0500, Richard Shaw wrote:
> But it actually doesn't do anything. All the old files are still on
> the SD card.

Are you absolutely sure the SD card was /dev/sdb1?

[Richard Shaw]

On Sat, Sep 21, 2019 at 11:30 PM Tim via users <
[e-mail]> wrote:
> On Sat, 2019-09-21 at 12:03 -0500, Richard Shaw wrote:
> > But it actually doesn't do anything. All the old files are still on
> > the SD card.
>
> Are you absolutely sure the SD card was /dev/sdb1?

I figured someone would ask that :)

Yes, I only have a NVME SSD (completely different naming scheme), and one
rotational HD (/dev/sda), plus I checked dmesg to be sure.

Thanks,
Richard

[Richard Shaw]

Well, it may not be mkexfatfs's problem...

I tried using gparted to re-format it FAT32 - Everything "completed
successfully" but same result on replug, all the files are there.

I tried deleting a directory on it, and "emptied the trash", unplug,
replug, directory is back.

[86799.359224] scsi 10:0:0:0: Direct-Access     Generic  STORAGE DEVICE
1404 PQ: 0 ANSI: 6
[86799.359637] sd 10:0:0:0: Attached scsi generic sg2 type 0
[86799.571164] sd 10:0:0:0: [sdb] 31116288 512-byte logical blocks: (15.9
GB/14.8 GiB)
[86799.573477] sd 10:0:0:0: [sdb] Write Protect is off
[86799.573481] sd 10:0:0:0: [sdb] Mode Sense: 21 00 00 00
[86799.575487] sd 10:0:0:0: [sdb] Write cache: disabled, read cache:
enabled, doesn't support DPO or FUA
[86799.588396]  sdb: sdb1
[86799.593493] sd 10:0:0:0: [sdb] Attached SCSI removable disk
[86799.809090] FAT-fs (sdb1): Volume was not properly unmounted. Some data
may be corrupt. Please run fsck.

Also, I've tried clearing the dirty bit and I can keep running fsck and it
keeps saying it's dirty but per the dmesg output write protect is off.

I'm at a loss...

Richard
>