Missing hard drive space

jdow jdow at earthlink.net
Mon Apr 20 20:21:06 UTC 2009 

Oh - that may be a problem. So let's simply try pulling the USB drives,
rebooting to get a clean place to work, and then manually mount the
VFAT drive, the 400G drive. If you can manually mount it successfully
then you can follow the steps below for creating your fstab entries.

Check to make sure the drive loaded as sdb by using fdisk or something
similar, "sudo fdisk -l /dev/sdb". If that works the drive is sdb. Try
also for sdc in case something remembers it was at one time sdc.

sudo mkdir /media/External/400GB
sudo mount /dev/sdb /media/External/400GB
(or if that fails "sudo mount -t vfat /dev/sdb /media/External/400GB")

If you can get that far the first trial fstab entry should work - after
you "sudo umount /media/External/400GB".

Note I am using the drive sizes to disambiguate the naming. Once you
get them mounting the way you want you can go on to create the real
mount points you want to use and make the necessary change in fstab.

{^_^}
----- Original Message ----- 
From: "MG" <m.s0128532 at gmail.com>
Sent: Monday, 2009/April/20 12:52


> how do I get Windows back?
>
> On 20/04/2009, jdow <jdow at earthlink.net> wrote:
>>
>> First step I'd make sure the device still mounts on Windows. I believe
>> you've said they are USB based devices. So make sure you "safely
>> remove hardware" to dismount the drives before going back to Linux.
>>
>> If it mounts for Windows and you dismount it properly it should mount
>> on Linux. That's appararently your FAT based disk. So you should not
>> try mounting it NTFS. And you are not.
>>
>> If they are USB devices they may change device numbers depending on
>> the order in which they are detected or inserted. So labels or UUIDs
>> are a better approach.
>>
>> Presuming you are in Linux comment out the lines for the three USB
>> drives.
>>
>> Then make sure the disks are "clean" on Windows and dismounted cleanly.
>>
>> Leave them disconnected and boot Linux.
>>
>> Now plug in the drive designated as /dev/sdc originally. It's the
>> 400.0 GB drive.
>>
>> Check that the drive was found using fdisk on /dev/sdb or /dev/sdc
>> (etc). Once you find it we can start rebuilding fstab, slowly and
>> methodically.
>>
>> Presuming that it's /dev/sdb, since it is the only other drive
>> attached, create a line in /etc/fstab that looks like this:
>>
>> sudo /dev/sdb1  /media/External/400GB vfat rw,hard,intr    0  0
>>
>> Create the /media/External/400GB mountpoint directory.
>> (sudo mkdir /media/External/400GB)
>>
>> Now we're ready to "sudo mount /dev/sdb1". If that worked we're part
>> way there. Now unmount it and let's edit the fstab again.
>> sudo umount /dev/sdb1
>>
>> You ran vol-id while this drive was drive C - I think. (If you have
>> been plugging and uplugging the drives the data may be wrong. So
>> check it again running vol-id against /dev/sdb in this case.)
>>
>> Edit the line in fstab starting with /dev/sdc1 to change "/dev/sdc1"
>> to "UUID=17E8-082F".
>>
>> Now try "sudo mount /media/External/400GB". If that worked you are
>> nearly home free.
>>
>> Repeat for mountpoints /media/External/320GB and /media/External/160GB.
>> Make sure you have the drive UUID's correct and working. Then it will
>> not matter in which order the drives are discovered on boot up or as
>> you plug and unplug them. If you plug and unplug with Linux running you
>> must use "umount" to dismount the drive before unplugging it. And you
>> may need to use "mount" to mount the drive after plugging it in. If you
>> plan to have them always present you can change the final zeros on the
>> fstab lines to 2 and have them mount at boot time.
>>
>> {^_^}
>>
>>
>> ----- Original Message -----
>> From: "MG" <m.s0128532 at gmail.com>
>>
>> To: "Ubuntu user technical support,not for general discussions"
>> <ubuntu-users at lists.ubuntu.com>
>>
>> Sent: Monday, 2009/April/20 11:44
>> Subject: Re: Missing hard drive space
>>
>>
>> > Some progress, any ideas now?
>> > Thx!
>> >
>> > root at THUNDERCAT1:/home/max# sudo mount -a
>> > mount: wrong fs type, bad option, bad superblock on /dev/sdc1,
>> >       missing codepage or helper program, or other error
>> >       In some cases useful info is found in syslog - try
>> >       dmesg | tail  or so
>> >
>> > $MFTMirr does not match $MFT (record 1).
>> > Failed to mount '/dev/sdb1': Input/output error
>> > NTFS is either inconsistent, or you have hardware faults, or you have a
>> > SoftRAID/FakeRAID hardware. In the first case run chkdsk /f on Windows
>> > then reboot into Windows TWICE. The usage of the /f parameter is very
>> > important! If you have SoftRAID/FakeRAID then first you must activate
>> > it and mount a different device under the /dev/mapper/ directory, (e.g.
>> > /dev/mapper/nvidia_eahaabcc1). Please see the 'dmraid' documentation
>> > for the details.
>> > NTFS signature is missing.
>> > Failed to mount '/dev/sdd1': Invalid argument
>> > The device '/dev/sdd1' doesn't have a valid NTFS.
>> > Maybe you selected the wrong device? Or the whole disk instead of a
>> > partition (e.g. /dev/hda, not /dev/hda1)? Or the other way around?
>> > root at THUNDERCAT1:/home/max#
>> >
>> > # /etc/fstab: static file system information.
>> > #
>> > #  -- This file has been automaticly generated by ntfs-config --
>> > #
>> > # <file system> <mount point>   <type>  <options>       <dump>  <pass>
>> >
>> > proc /proc proc defaults 0 0
>> > # Entry for /dev/sda1 :
>> > UUID=d053ecd0-1482-4cfc-8b34-1d821a41f843 / ext3
>> > relatime,errors=remount-ro
>> > 0 1
>> > # Entry for /dev/sda5 :
>> > UUID=8c6a2356-9c6b-4ef1-9b65-8e6edbf76120 none swap sw 0 0
>> > /dev/scd0 /media/cdrom0 udf,iso9660 user,noauto,exec,utf8 0 0
>> > none       /mnt/ramfs      tmpfs      defaults  0 0
>> > # Entry for /dev/sdc1 :
>> > /dev/sdc1       /media/External/usb1      vfat      rw,hard,intr  2 2
>> > # Entry for /dev/sdb1 :
>> > /dev/sdb1       /media/External/usb2      ntfs-3g      rw,hard,intr  2 
>> > 2
>> > # Entry for /dev/sdd1 :
>> > /dev/sdd1       /media/External/usb3      ntfs-3g      rw,hard,intr  2 
>> > 2
>> >
>>
>>
>>
>>
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>>
>>
>>
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