accessing samsung galaxy s2 storage from f15 minimal install

[Carrot Cruncher]

hi. i have a server built out using a minimal f15 installation. when i connect my samsung galaxy s2 via usb i see the following in the syslog :

Aug 10 09:31:43 server kernel: [593577.329268] usb 2-1.2: new high speed USB device number 17 using ehci_hcd
Aug 10 09:31:43 server kernel: [593577.405527] usb 2-1.2: New USB device found, idVendor=04e8, idProduct=685e
Aug 10 09:31:43 server kernel: [593577.406045] usb 2-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Aug 10 09:31:43 server kernel: [593577.406506] usb 2-1.2: Product: SAMSUNG_Android
Aug 10 09:31:43 server kernel: [593577.406972] usb 2-1.2: Manufacturer: SAMSUNG
Aug 10 09:31:43 server kernel: [593577.407433] usb 2-1.2: SerialNumber: 304D195C9F01B46E
Aug 10 09:31:43 server kernel: [593577.410345] scsi20 : usb-storage 2-1.2:1.0
Aug 10 09:31:43 server kernel: [593577.411278] cdc_acm 2-1.2:1.1: This device cannot do calls on its own. It is not a modem.
Aug 10 09:31:43 server kernel: [593577.411836] cdc_acm 2-1.2:1.1: ttyACM0: USB ACM device
Aug 10 09:31:44 server kernel: [593578.412201] scsi 20:0:0:0: Direct-Access Android UMS Composite 00 PQ: 0 ANSI: 2
Aug 10 09:31:44 server kernel: [593578.413144] scsi 20:0:0:1: Direct-Access Android UMS Composite 00 PQ: 0 ANSI: 2
Aug 10 09:31:44 server kernel: [593578.419382] sd 20:0:0:0: Attached scsi generic sg4 type 0
Aug 10 09:31:44 server kernel: [593578.421152] sd 20:0:0:1: Attached scsi generic sg5 type 0
Aug 10 09:31:44 server kernel: [593578.427642] sd 20:0:0:1: [sdd] Attached SCSI removable disk
Aug 10 09:31:44 server kernel: [593578.428766] sd 20:0:0:0: [sdc] Attached SCSI removable disk

but when i enable the usb storage on the samsung nothing happens and i can't access the storage.

if i boot the same server using a f15 live usb stick and connect the phone i see :

Aug 10 09:52:33 localhost kernel: [ 244.862183] usb 1-4: new high speed USB device using ehci_hcd and address 5
Aug 10 09:52:33 localhost kernel: [ 244.977503] usb 1-4: New USB device found, idVendor=04e8, idProduct=685b
Aug 10 09:52:33 localhost kernel: [ 244.977518] usb 1-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Aug 10 09:52:33 localhost kernel: [ 244.977530] usb 1-4: Product: SAMSUNG_Android
Aug 10 09:52:33 localhost kernel: [ 244.977538] usb 1-4: Manufacturer: SAMSUNG
Aug 10 09:52:33 localhost kernel: [ 244.977546] usb 1-4: SerialNumber: 304D195C9F01B46E
Aug 10 09:52:33 localhost kernel: [ 245.019368] scsi3 : usb-storage 1-4:1.0
Aug 10 09:52:33 localhost mtp-probe: checking bus 1, device 5: "/sys/devices/pci0000:00/0000:00:1d.7/usb1/1-4"
Aug 10 09:52:33 localhost mtp-probe: bus: 1, device: 5 was not an MTP device
Aug 10 09:52:34 localhost kernel: [ 246.023216] scsi 3:0:0:0: Direct-Access Android UMS Composite 00 PQ: 0 ANSI: 2
Aug 10 09:52:34 localhost kernel: [ 246.023819] scsi 3:0:0:1: Direct-Access Android UMS Composite 00 PQ: 0 ANSI: 2
Aug 10 09:52:34 localhost kernel: [ 246.028366] sd 3:0:0:0: Attached scsi generic sg2 type 0
Aug 10 09:52:34 localhost kernel: [ 246.035420] sd 3:0:0:1: Attached scsi generic sg3 type 0
Aug 10 09:52:34 localhost kernel: [ 246.054099] sd 3:0:0:0: [sdc] Attached SCSI removable disk
Aug 10 09:52:34 localhost kernel: [ 246.064925] sd 3:0:0:1: [sdd] Attached SCSI removable disk

but this time when i enable the usb storage on the phone i see :

Aug 10 09:52:40 localhost kernel: [ 252.006821] sd 3:0:0:1: [sdd] 62325760 512-byte logical blocks: (31.9 GB/29.7 GiB)
Aug 10 09:52:40 localhost kernel: [ 252.015142] sd 3:0:0:1: [sdd] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Aug 10 09:52:40 localhost kernel: [ 252.034617] sdd:
Aug 10 09:52:42 localhost kernel: [ 254.009149] sd 3:0:0:0: [sdc] 24133632 512-byte logical blocks: (12.3 GB/11.5 GiB)
Aug 10 09:52:42 localhost kernel: [ 254.010525] sd 3:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Aug 10 09:52:42 localhost kernel: [ 254.016129] sdc:

and can access the storage.

when booted into the minimal installation, other usb devices such as usb sticks can be accessed and mounted successfully.

can anyone tell me what i'm missing from my minimal installation that is preventing the samsung storage from being accessible ? cheers.