Ubuntu: dual boot windows 7 and ubuntu 17.04--sda5 superblock corruptedb



Question:

Boot Info Script cfd9efe + Boot-Repair extra info [Boot-Info 26Apr2016]

============================= Boot Info Summary: ===============================

=> Grub2 (v2.00) is installed in the MBR of /dev/sda and looks at sector 1 of the same hard drive for core.img. core.img is at this location and looks for (,msdos5)/boot/grub. It also embeds following components:

modules  ---------------------------------------------------------------------------  fshelp ext2 part_msdos biosdisk  ---------------------------------------------------------------------------  

=> No known boot loader is installed in the MBR of /dev/sdb.

sda1: __________________________________________________________________________

File system:       ntfs  Boot sector type:  Windows 8/2012: NTFS  Boot sector info:  No errors found in the Boot Parameter Block.  Operating System:    Boot files:        /bootmgr /Boot/BCD  

sda2: __________________________________________________________________________

File system:       ntfs  Boot sector type:  Windows 8/2012: NTFS  Boot sector info:  No errors found in the Boot Parameter Block.  Operating System:    Boot files:        /bootmgr /Boot/BCD /Windows/System32/winload.exe  

sda3: __________________________________________________________________________

File system:       Extended Partition  Boot sector type:  -  Boot sector info:   

sda5: __________________________________________________________________________

File system:       ext4  Boot sector type:  -  Boot sector info:   Mounting failed:   mount: mount /dev/sda5 on /mnt/BootInfo/sda5 failed: Bad message  

sda6: __________________________________________________________________________

File system:       ext4  Boot sector type:  -  Boot sector info:   Mounting failed:   mount: mount /dev/sda5 on /mnt/BootInfo/sda5 failed: Bad message  

mount: mount /dev/sda6 on /mnt/BootInfo/sda6 failed: Bad message

sda7: __________________________________________________________________________

File system:       swap  Boot sector type:  -  Boot sector info:   

after fresh install ubuntu 17.04 to lenovo e555 beside windows 7 with dual boot; it boots to ubuntu with no problem; then boot to windows with not problem; then boot to ubuntu and there is complaint of corrupted superblock on sda5(which should be /home). I ran boot-repair with same results: I can boot to ubuntu no problem until after I boot to windows--then will not boot to ubuntu...


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