Hello, this is the first time i come here.
i just want to mount portable USB hardisk in RedHat Linux 9.0,
but i don't know how to accomplish this, i know how to mount a flashdisk
using "mount -t vfat -o iocharset=gb2312 /dev/sda1 /mnt/usb", but when i
apply that command on a USB hardisk, it doesn't work.
Could someone give me some advice? Linux is a whole new world to me...
Forgive me if i thank you some hours or some days later because my access to the internet is limited by time.
Thanks!!

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Leave out the "-o iocharset=gb2312" bit and see if that helps.

If not - well, has it been partitioned? If so, is it FAT? If you're not sure, try running "fdisk -l" or "cfdisk /dev/sda" and see what it tells you. . .

Does it give you an error message?

Thanks,oneandoneis2 and depdiver
when i use "mount -t vfat /dev/sda /mnt/usb", the error message is
"/dev/sda is not a valid block device"
so i tried "mount -t auto /dev/sda1 /mnt/usb", but the same error message
appeared.
so, oneandoneis2 and depdiver, what is the device name for a external USB
hdd?
my USB hdd was partitioned with several partitions, and all the partitions were formated with fat32.
Best reguards!!

you can double check device name for hd, when you connect usb to box, as root do
" tail /var/log/messages " and you will see something like
Kernel: Attached scsi disk sda at scsi1, channel 0, id 0, lun 0 ( where sda is device name )

and as you have partitions on disk, i suggest samething as oneandoneis2 did, try running as root "fdisk -l"

i solved the problem!!
in redhat 9 with the kernel 2.4.20-8, you have to compile the kernel if you want to use the usb-storage
the following is how i did:


First, edit the file /usr/src/linux-2.4.20-8/Makefie, from the beginning, you will see the value like this "EXTRAVERSION =XXXX", replace it with "EXTRAVERSION =-8", this step is very important!!
you may have the question, "why should the value be -8?", sorry, i don't konw why, but remember, it depends on the kernel you are using. For example, if you are use the kernel 2.4.20-8, you must replace "EXTRAVERSION =XXXX" with "EXTRAVERSION =-8"

Second, modify the header file /usr/src/linux-2.4.20-8/drivers/usb/storage/unusual_devs.h
in the file, find the sections like the following:
UNUSUAL_DEV( 0x05e3, 0x0702, 0x0000, 0x0001,
"EagleTec",
"External Hard Disk",
US_SC_SCSI, US_PR_BULK, NULL,
US_FL_FIX_INQUIRY ),

if you find that, modify it with following:
UNUSUAL_DEV( 0x05e3, 0x0702, 0x0000, 0x9999,
"EagleTec",
"External Hard Disk",
US_SC_SCSI, US_PR_BULK, NULL,
US_FL_FIX_INQUIRY | US_FL_MODE_XLATE | US_FL_START_STOP ),

Ok, after that do the following:
#cp /boot/config-2.4.20-8 /usr/src/linux-2.4.20-8/.config
then, change your directory to /usr/src/linux-2.4.20-8/
and go on:
#make mrproper(if you have compiled the kernel, add this command)
#make oldconfig
#make dep
#make modules (this step will expend considerable time)

All right!! everything is almost ready!!
just a few steps:
#cp /usr/src/linux-2.4.20-8/drivers/usb/storage/usb-storage.o /lib/modules/2.4.20-8/kernel/drivers/usb/storage/
after that step, you can plug your USB hdd.

then:
#modprobe -r usb-storage
#modprobe usb-storage(if you compile the kernel correctly, no error message will appear)

after that, try this command:
fdisk -l
did you see the info about you USB hdd?

everything is ready, just mount!!
#mount -t vfat /dev/sda1(the number may be different) /mnt/your directory

Maybe it's helpful, thanks all the friends above!!