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Old 12-16-2010, 01:16 PM   #1
huntkey
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Registered: Dec 2008
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RHEL5 not assign a partition for usb key


Hi experts,

I'm trying to mount a USB key in a RHEL5 box to upload some file. I found doc online and followed it and mounted it fine the first time. Then I unplugged it and found that I have another file to upload so I plugged it back in. However this time it's not assigned a partition (last time was sdb1) and I can't mount it anymore.

I think the USB key is recognized and the driver is installed properly:

# lsusb
Bus 002 Device 002: ID 8087:0020
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 006: ID 054c:0243 Sony Corp. MicroVault Flash Drive
Bus 001 Device 003: ID 0424:2514 Standard Microsystems Corp.
Bus 001 Device 002: ID 8087:0020
Bus 001 Device 001: ID 0000:0000

It also seems that it's recognized as a storage device and assigned a drive letter:

# dmesg | grep -i scsi
...
scsi7 : SCSI emulation for USB Mass Storage devices
Type: Direct-Access ANSI SCSI revision: 02
SCSI device sdb: 7864320 512-byte hdwr sectors (4027 MB)
SCSI device sdb: 7864320 512-byte hdwr sectors (4027 MB)
Attached scsi removable disk sdb at scsi7, channel 0, id 0, lun 0
Attached scsi generic sg3 at scsi7, channel 0, id 0, lun 0, type 0

However no partition is assigned to it...

fdisk -l

Disk /dev/sda: 146.1 GB, 146163105792 bytes
255 heads, 63 sectors/track, 17769 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 33 265041 83 Linux
/dev/sda2 34 17769 142464420 8e Linux LVM

help, please!!!
Thanks,
 
Old 12-16-2010, 03:35 PM   #2
lazlow
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Did you umount the stick before you pulled it out of the machine?
 
Old 12-16-2010, 03:35 PM   #3
ilvista
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what does this give you?
Code:
mount /dev/sdb1 /mnt/usb
 
Old 12-17-2010, 12:46 PM   #4
huntkey
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Quote:
Originally Posted by lazlow View Post
Did you umount the stick before you pulled it out of the machine?
Yup I did!! I mounted it as root to the folder /root/usb/ and I unmounted after I finished with it. Is it because I didn't mount it to the /mnt directory? What else do I have to do except unmounting it? I know in Windows you need to right click and select remove the device or somthing lol
 
Old 12-17-2010, 12:48 PM   #5
huntkey
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Registered: Dec 2008
Posts: 19

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Quote:
Originally Posted by ilvista View Post
what does this give you?
Code:
mount /dev/sdb1 /mnt/usb
It gave me an error something like the sdb1 not existed... I have rebooted the machine and it's fine now. This is at customer site so I don't have physical access to it. When this happens again I will for sure copy the error message.

Thanks,
 
Old 12-17-2010, 03:04 PM   #6
lazlow
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Gernerally you mount (temp) stuff in the media directory.

Other than waiting a couple of seconds after you gave the umount(not a typo)command, nothing comes to mind. Sometimes things are setup with lazy writes, so it can take a couple of seconds for stuff to be written to the drive.
 
Old 12-17-2010, 07:00 PM   #7
syg00
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Plug it in and issue these (root/sudo for the fdisk)
Code:
dmesg | tail -n 15
fdisk -l
 
  


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