usb memory 마운트 하는 방법에 대하여 조언을 구합니다.

안녕하세요 리눅스 완전초짜입니다.
임베디드 시스템에서 USB memory를 마운트하여 사용하려는데,
마운트가 되지 않습니다. 무엇을 확인하여야 할지 모르겠는데,
고수님들의 조언 부탁드립니다.

리눅스 버젼 :
# uname -ar
Linux 2.6.11.7-1.07.0malindi #117 Fri Sep 22 11:28:00 KST 2006 armv4tl unknown

커널 정보 출력시 usb를 인식한 것으로 보입니다 :
#dmesg
hub 1-0:1.0: state 5 ports 2 chg 0000 evt 0002
m828xx-ohci m828xx-ohci: GetStatus roothub.portstatus [0] = 0x00010101 CSC PPS CCS
hub 1-0:1.0: port 1, status 0101, change 0001, 12 Mb/s
hub 1-0:1.0: debounce: port 1: total 100ms stable 100ms status 0x101
m828xx-ohci m828xx-ohci: GetStatus roothub.portstatus [0] = 0x00100103 PRSC PPS PES CCS
usb 1-1: new full speed USB device using m828xx-ohci and address 2
m828xx-ohci m828xx-ohci: GetStatus roothub.portstatus [0] = 0x00100103 PRSC PPS PES CCS
usb 1-1: new device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-1: default language 0x0409
usb 1-1: Product: Flash Disk
usb 1-1: Manufacturer: USB
usb 1-1: SerialNumber: 181C19E53FB846E2
usb 1-1: hotplug
usb 1-1: adding 1-1:1.0 (config #1, interface 0)
usb 1-1:1.0: hotplug
hub 1-0:1.0: state 5 ports 2 chg 0000 evt 0002
hub 1-0:1.0: state 5 ports 2 chg 0000 evt 0002
m828xx-ohci m828xx-ohci: GetStatus roothub.portstatus [0] = 0x00030100 PESC CSC PPS
hub 1-0:1.0: port 1, status 0100, change 0003, 12 Mb/s
usb 1-1: USB disconnect, address 2
usb 1-1: usb_disable_device nuking all URBs
usb 1-1: unregistering interface 1-1:1.0
usb 1-1:1.0: hotplug
usb 1-1: unregistering device
usb 1-1: hotplug
hub 1-0:1.0: debounce: port 1: total 100ms stable 100ms status 0x100

커널 모듈정보시 usb모듈이 구동되지 않았나여(?)
# lsmod
Module Size Used by Tainted: P
devBootEnv 12076 0 - Live 0xbf009000
devgpio 2628 0 - Live 0xbf007000
csmencaps 22192 0 - Live 0xbf000000
#

usb메모리 plugin시 메세지 :
#
usb 1-1: new full speed USB device using m828xx-ohci and address 3
usb 1-1: Product: Flash Disk
usb 1-1: Manufacturer: USB
usb 1-1: SerialNumber: 181C19E53FB846E2

디바이스 정보 :
/proc/bus # ls -l /dev/
-rwxrwxrwx 1 518 519 6076 Feb 8 04:21 ELDK_MAKEDEV
crwxrwxrwx 1 518 519 242, 0 Feb 8 04:21 bootenv
crwxrwxrwx 1 518 519 5, 1 Apr 5 09:00 console
crwxrwxrwx 1 518 519 245, 0 Feb 8 06:21 devgpio
crwxrwxrwx 1 518 519 246, 0 Feb 8 06:21 devled
-> fb0rwx 1 0 0 3 Oct 19 2006 fb
-> flasha3 1 0 0 7 Oct 19 2006 flash_environment
-> flasha2 1 0 0 7 Oct 19 2006 flash_kernel
-> flasha1 1 0 0 7 Oct 19 2006 flash_monitor
-> flasha4 1 0 0 7 Oct 19 2006 flash_reserved
-> nullwx 1 0 0 4 Oct 19 2006 mouse
crwxrwxrwx 1 518 519 90, 0 Jun 9 2006 mtd0
crwxrwxrwx 1 518 519 90, 2 Jun 9 2006 mtd1
crwxrwxrwx 1 518 519 90, 4 Jun 9 2006 mtd2
crwxrwxrwx 1 518 519 90, 6 Jun 9 2006 mtd4
crwxrwxrwx 1 518 519 90, 8 Jun 9 2006 mtd5
brwxrwxrwx 1 518 519 31, 0 Jun 9 2006 mtdblock0
brwxrwxrwx 1 518 519 31, 1 Jun 9 2006 mtdblock1
brwxrwxrwx 1 518 519 31, 2 Feb 8 04:21 mtdblock2
brwxrwxrwx 1 518 519 31, 3 Feb 8 05:35 mtdblock3
brwxrwxrwx 1 518 519 31, 4 Feb 8 05:35 mtdblock4
brwxrwxrwx 1 518 519 31, 5 Feb 11 04:51 mtdblock5
brwxrwxrwx 1 518 519 8, 0 Jul 13 2006 sda
brwxrwxrwx 1 518 519 8, 1 Jul 13 2006 sda1
crw--w--w- 1 0 0 4, 64 Apr 5 09:39 ttyS0

# ls -l /mnt
drwxrwxrwx 1 0 0 512 Sep 22 2006 csp
drwxrwxr-x 1 518 519 512 Oct 19 2006 msp
drwxrwxrwx 1 518 519 512 May 15 2006 nand1
drw-rw-rw- 1 0 0 2048 Jan 1 1970 nand2
drwxrwxrwx 1 518 519 512 May 15 2006 usb

마운트 수행 :
# more /etc/fstab
/dev/mtdblock2 / yaffs default 0 0
/dev/sda /mnt/usb vfat noauto,users,iocharset=utf8,codepage=949,uid=1000,gid=1000 0 2

# mount /dev/sda /mnt/usb
mount: Mounting /dev/sda on /mnt/usb failed: No such device or address

마운트 수행시 에러가 발생합니다.

절차가 잘못되었는지, 아니면 모듈이 구동되지 않았는지 고수님들 도와주세요 ^^