Unable to mount USB Flash memory created on CentOS

[James B. Byrne]

I put one of the subject usb flash drives into a CentOS-6 box and ran
mke2fs -n on the partition.  This gave me the backup superblock
addresses.

# mke2fs -n /dev/sdb
mke2fs 1.41.12 (17-May-2010)
/dev/sdb is entire device, not just one partition!
Proceed anyway? (y,n) y
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
122400 inodes, 489216 blocks
24460 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=503316480
15 block groups
32768 blocks per group, 32768 fragments per group
8160 inodes per group
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912

Which information I used to run fsck:

# e2fsck -b 32768 /dev/sdb1
e2fsck 1.41.12 (17-May-2010)
CA_HLL_2016_BKUP was not cleanly unmounted, check forced.
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
Block bitmap differences:  -(73728--81919) . . .
. . .
97895--97897) -97900 -97904 -97907 -(97911--97912) -97914
-(97916--97917) -(97919--97920)
Fix<y>? yes

Free inodes count wrong for group #0 (8149, counted=5908).
Fix<y>? yes

Directories count wrong for group #0 (2, counted=219).
Fix<y>? yes

Free inodes count wrong for group #1 (8160, counted=8148).
Fix<y>? yes

Directories count wrong for group #1 (0, counted=12).
Fix<y>? yes

Free inodes count wrong (122389, counted=120136).
Fix<y>? yes


CA_HLL_2016_BKUP: ***** FILE SYSTEM WAS MODIFIED *****
CA_HLL_2016_BKUP: 2264/122400 files (0.0% non-contiguous),
20686/489141 blocks

This has not repaired whatever is keeping the Mate desktop from
mounting the device.  But as that is a matter of convenience rather
than necessity I will simply deal with unit through the command line.

Thank you for all tghehelp.

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James B. Byrne                mailto:ByrneJB at Harte-Lyne.ca
Harte & Lyne Limited          http://www.harte-lyne.ca
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