[ONE General] giaur:
For me does not work, logcat:

D/Vold ( 218): Found vfat filesystem on /dev/block/vold/8:1
I/fsck_msdos( 218): ** /dev/block/vold/8:1
W/VideoCapabilities( 4144): Unsupported mime video/x-ms-wmv
D/fsck_msdos( 4215): sectors Per cluster :64
D/fsck_msdos( 4215): boot->ClusterOffset :3776
I/fsck_msdos( 4215): FAT32 Filesystem
D/fsck_msdos( 4215): Using cluster_chain_descriptor
I/fsck_msdos( 4215): Total clusters 246308
I/fsck_msdos( 218): ** Phase 1 - Read and Compare FATs
I/fsck_msdos( 218): Attempting to allocate 962 KB for FAT
W/VideoCapabilities( 4144): Unsupported mime video/divx
W/VideoCapabilities( 4144): Unsupported mime video/divx311
W/VideoCapabilities( 4144): Unsupported mime video/divx4
W/VideoCapabilities( 4144): Unsupported mime video/mp4v-esdp
I/VideoCapabilities( 4144): Unsupported profile 4 for video/mp4v-es
W/AudioCapabilities( 4144): Unsupported mime audio/x-ms-wma
W/AudioCapabilities( 4144): Unsupported mime audio/vnd.rn-realaudio
W/AudioCapabilities( 4144): Unsupported mime audio/mpeg-L2
W/AudioCapabilities( 4144): Unsupported mime audio/ac3
W/AudioCapabilities( 4144): Unsupported mime audio/x-ape
W/AudioCapabilities( 4144): Unsupported mime audio/vnd.dts
W/AudioCapabilities( 4144): Unsupported mime audio/ffmpeg
W/VideoCapabilities( 4144): Unsupported mime video/mpeg2
W/VideoCapabilities( 4144): Unsupported mime video/x-ms-wmv
W/VideoCapabilities( 4144): Unsupported mime video/vnd.rn-realvideo
W/VideoCapabilities( 4144): Unsupported mime video/x-flv
W/VideoCapabilities( 4144): Unsupported mime video/ffmpeg
I/fsck_msdos( 218): Attempting to allocate 962 KB for FAT
I/ActivityManager( 779): Killing 3702:com.cyanogenmod.settings.device/1000 (adj 15): empty #17
W/libprocessgroup( 779): failed to open /acct/uid_1000/pid_3702/cgroup.procs: No such file or directory
I/ActivityManager( 779): Waited long enough for: ServiceRecord{3130115d u0 com.imo.android.imoim/.DummyService}
I/fsck_msdos( 4215): Begin to compare FAT
I/fsck_msdos( 4215): ** Phase 2 - Check Cluster Chains
I/fsck_msdos( 4215): Begin to handle the cluster chain
I/fsck_msdos( 218): ** Phase 3 - Checking Directories
D/fsck_msdos( 4215): rootDir->head :2
I/ActivityManager( 779): Start proc com.yanyan.cputemp for broadcast com.yanyan.cputemp/com.yanyan.receiver.MyBootReceiver: pid=4218 uid=10138 gids={50138, 9997, 3003, 1028, 1015} abi=armeabi-v7a
I/ActivityManager( 779): Killing 3753:com.android.gallery3d/u0a43 (adj 15): empty #17
I/art ( 252): Explicit concurrent mark sweep GC freed 706(30KB) AllocSpace objects, 0(0B) LOS objects, 39% free, 9MB/16MB, paused 145us total 8.772ms
I/art ( 252): Explicit concurrent mark sweep GC freed 5(160B) AllocSpace objects, 0(0B) LOS objects, 39% free, 9MB/16MB, paused 135us total 7.065ms
I/art ( 252): Explicit concurrent mark sweep GC freed 5(160B) AllocSpace objects, 0(0B) LOS objects, 39% free, 9MB/16MB, paused 134us total 7.177ms
W/libprocessgroup( 779): failed to open /acct/uid_10043/pid_3753/cgroup.procs: No such file or directory
D/fsck_msdos( 4215): Verify Filesystem information
W/fsck_msdos( 4215): 33 files, 3686464 free (246274 clusters)
I/fsck_msdos( 4215): free_rb_tree
I/fsck_msdos( 4215): free_fragment_tree
I/fsck_msdos( 4215): free_fragment_tree
I/fsck_msdos( 4215): free_fragment_tree: rb_tree is empty
I/fsck_msdos( 218): ** Phase 4 - Checking for Lost Files
I/Vold ( 218): Filesystem check completed OK
I/ActivityManager( 779): Start proc de.sec.mobile for broadcast de.sec.mobile/.BootCompleteReceiver: pid=4238 uid=10135 gids={50135, 9997, 3003, 1028, 1015} abi=armeabi-v7a
I/ActivityManager( 779): Killing 3772:com.android.exchange/u0a41 (adj 15): empty #17
W/libprocessgroup( 779): failed to open /acct/uid_10041/pid_3772/cgroup.procs: No such file or directory
D/ACRA ( 4238): ACRA is enabled for de.sec.mobile, intializing...
D/ACRA ( 4238): Using default Report Fields
D/ACRA ( 4238): Looking for error files in /data/data/de.sec.mobile/files
D/PhoneApp( 1592): getPhone phoneId:0
D/PhoneApp( 1592): getPhone phoneId:0
I/Process ( 3618): Sending signal. PID: 3618 SIG: 9
E/lowmemorykiller( 216): Error writing /proc/3618/oom_score_adj; errno=22
I/ActivityManager( 779): Process com.google.android.gms:car (pid 3618) has died
D/Vold ( 218): blkid identified as /dev/block/vold/8:1: UUID="47D7-15E0" TYPE="vfat"
D/Vold ( 218): Volume usbdisk state changing 3 (Checking) -> 4 (Mounted)
E/cutils ( 218): Failed to mkdirat(/storage/usbdisk/Android): Read-only file system
W/Vold ( 218): Returning OperationFailed - no handler for errno 30
E/cutils ( 218): Failed to mkdirat(/storage/usbdisk/Android): Read-only file system
W/Vold ( 218): Returning OperationFailed - no handler for errno 30
D/MountService( 779): volume state changed for /storage/usbdisk (checking -> mounted)
I/PackageManager( 779): Updating external media status from unmounted to mounted
E/VoldConnector( 779): NDC Command {8 volume mkdirs /storage/usbdisk/Android/data/com.rhmsoft.fm.hd/cache/} took too long (2329ms)
E/VoldConnector( 779): NDC Command {7 volume mount /storage/usbdisk} took too long (2947ms)
E/VoldConnector( 779): NDC Command {9 volume mkdirs /storage/usbdisk/Android/data/de.sec.mobile/cache/} took too long (908ms)
D/MountService( 779): sendStorageIntent Intent { act=android.intent.action.MEDIA_MOUNTED dat=file:///storage/usbdisk flg=0x4000000 (has extras) } to UserHandle{-1}
W/ContextImpl( 4074): Failed to ensure directory: /storage/usbdisk/Android/data/com.rhmsoft.fm.hd/cache
W/ContextImpl( 4238): Failed to ensure directory: /storage/usbdisk/Android/data/de.sec.mobile/cache

As shown above, mount fails:

E/VoldConnector( 779): NDC Command {7 volume mount /storage/usbdisk} took too long (2947ms)

Need to restart and it mounts ok, but only one time. My bug report seems to be ignored so far.