I have bought a new 1TB hard disk and formatted in ext4 file system type and attached to my CPU(Already having a HD with Ubuntu installed). Following the answer given here, I tried mounting the partition inside my Home directory(/home/user) to the path /home/user/1TB, by issuing the command sudo mount -o rw,uid=1001,gid=1001,user /dev/sdb1 1TB/. But each time I am getting the following error.

mount: wrong fs type, bad option, bad superblock on /dev/sdb1,
   missing codepage or helper program, or other error
   In some cases useful info is found in syslog - try
   dmesg | tail  or so

This is dmesg | tail output.

[52645.165434] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[52647.978811] r8169 0000:02:00.0 eth0: link up
[52647.978823] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[52653.411041] systemd-hostnamed[5821]: Warning: nss-myhostname is not installed. Changing the local hostname might make it unresolveable. Please install nss-myhostname!
[52678.211828] usb 1-1.4: USB disconnect, device number 8
[52928.283129] type=1400 audit(1418185818.128:68): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/sbin/mysqld" pid=10379 comm="apparmor_parser"
[53659.877790] EXT4-fs (sdb1): Unrecognized mount option "uid=1001" or missing value
[56166.333706] EXT4-fs (sdb1): Unrecognized mount option "uid=1001" or missing value
[56257.211210] EXT4-fs (sdb1): mounted filesystem with ordered data mode. Opts:  (null)
[56439.684477] EXT4-fs (sdb1): Unrecognized mount option "uid=1001" or missing value

But when mounting by issuing command sudo mount -o rw /dev/sdb1 1TB/, it mouted succefully, but the user don't have the permission to create files or directories inside it.

Ultimately, what I need is, I could mount the extra HD to any folder inside my home directory and also want make it permanent. Please advice on this.

  • try tail -n 3 /etc/passwd and check the uid corresponds to your username.
    – sourav c.
    Dec 10, 2014 at 5:41

1 Answer 1


The uid= and gid= options do not apply to ext4 file systems.

All you need to do is mount the file system as you did (sudo mount -o rw /dev/sdb1 1TB/).

Then sudo chown myusername:mygroupname 1TB

Then you will own the file system you created and will be able to create files there as yourself.

  • How can i make it permanent by editing fstab ? Dec 10, 2014 at 6:55
  • Add this line to /etc/fstab: /dev/sdb1 /home/myusername/1TB ext4 rw 0 1 Dec 10, 2014 at 22:35

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