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here is what i did and what happened:

I reduced my Harddisk (D) size by 200 GB (Windows is running on C (separate SSD) and on D i have installed some programms and a lot of data) Now i installed Ubuntu GNOME (14.04) into this 200 GB. Everything worked fine and i could just start Ubuntu and Windows afterwards. Only thing that happend is that Windows cant display D anymore and the disk-management-tool on windows tells me that it is invalid. But when i start Ubuntu everything is perfectly where it should be my partition hasn't been overwritten or sth. like that.

So i don't think i have to repair sth. but all in all i really dont know what to do.

fdisk -l:

Disk /dev/sda: 750.2 GB, 750156374016 bytes
255 heads, 63 sectors/track, 91201 cylinders, total 1465149168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x9f73ac2b

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1              63        2047         992+  42  SFS
Partition 1 does not start on physical sector boundary.
/dev/sda2            2048    26570751    13284352   27  Hidden NTFS WinRE
/dev/sda3   *    26570752  1045712895   509571072   42  SFS
/dev/sda4      1045714942  1465147391   209716225    5  Extended
Partition 4 does not start on physical sector boundary.
/dev/sda5      1045714944  1053712383     3998720   82  Linux swap / Solaris
/dev/sda6      1053714432  1465147391   205716480   83  Linux

Disk /dev/sdb: 128.0 GB, 128035676160 bytes
255 heads, 63 sectors/track, 15566 cylinders, total 250069680 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x9f73ac3c

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1   *        2048      206847      102400   27  Hidden NTFS WinRE
/dev/sdb2          206848   250066943   124930048    7  HPFS/NTFS/exFAT

parted -l:

Model: ATA WDC WD7500BPKT-2 (scsi)
Disk /dev/sda: 750GB
Sector size (logical/physical): 512B/4096B
Partition Table: msdos

Number  Start   End     Size    Type      File system     Flags
 1      32,3kB  1049kB  1016kB  primary
 2      1049kB  13,6GB  13,6GB  primary   ntfs            diag
 3      13,6GB  535GB   522GB   primary   ntfs            boot
 4      535GB   750GB   215GB   extended
 5      535GB   540GB   4095MB  logical   linux-swap(v1)
 6      540GB   750GB   211GB   logical   ext4


Model: ATA M4-CT128M4SSD3 (scsi)
Disk /dev/sdb: 128GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start   End    Size   Type     File system  Flags
 1      1049kB  106MB  105MB  primary  ntfs         boot, diag
 2      106MB   128GB  128GB  primary  ntfs

Hope you can help me! (Yeah i noticed there are a lot of similar posts but in my case the partition doesn't disappear i just cant get access anymore from win7)

@Edit seems like chkdisk cant access d:\ when i use gParted it shows: Partition: /dev/sda3 (+keysymbol); File System: ntfs; Mount Point: /media/befoerster/Data; Label: Data; Size: 485.96 GiB ...; Flags: boot; (i really dont understand why this partition is mounted under media/bfoerster/Data (is this normal?))

http://i.stack.imgur.com/IjD5M.png gParted (i unmounted D now but it made no difference(D is the 485GiB Partition))

(You can always tell me if i missed some important details i will add them as fast as possible - if it is sth. i could just google plz give me a hint what i have to search for)

I really need your help i'm depending on my notebook and the stuff installed on it and i found no solution for my problem by my self.

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in a german forum sb told me it is a windows problem, would it be senseful to repost this in the super user forum? –  baxbear Jun 15 at 8:34

1 Answer 1

did you try running chkdisk from Windows yet? You would start it from windows, it takes you to reboot and check it's partitions( consistency) before the start/booting( Windows). It helped me in similar cases.

Also I'd look at the flags with gParted.

By the way funny your question be titled "partition disappeared" and your last sentence is it didn't( disappear).

share|improve this answer
    
seems like chkdisk cant access d:\\ when i use gParted it shows: Partition: /dev/sda3 (+keysymbol); File System: ntfs; Mount Point: /media/befoerster/Data; Label: Data; Size: 485.96 GiB ...; Flags: boot; (i really dont understand why this partition is mounted under media/bfoerster/Data (is this normal?)) –  baxbear Jun 15 at 4:28

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