From: Weiner, Michael [mailto:weinerm@xxxxxxx] From: Gordon Messmer [mailto:gordon.messmer@xxxxxxxxx] On 04/21/2016 10:08 AM, Weiner, Michael wrote: >> mkfs.ext3 -F -b 4096 -n /dev/sdb1 >> >Note that I don't have a CentOS 5 system around for testing, and I don't know what mixing -F and -n does. > Yeah I was a little nervous about that, and as such, I didn’t try it:) because the flags are also counter to one another. Nonetheless, if you created a 15TB ext3 filesystem using the vendor's tools, you would have *had* to use "-F -b 4096". You're not going to locate superblock backups using any other set of arguments. [root@raos_apps01 ~]# mke2fs -F -b 4096 -n /dev/sdb1 mke2fs 1.39 (29-May-2006) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) 1830420480 inodes, 3660840711 blocks 183042035 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=4294967296 111720 block groups 32768 blocks per group, 32768 fragments per group 16384 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, 102400000, 214990848, 512000000, 550731776, 644972544, 1934917632, 2560000000 However I cannot use any of the superblocks it seems: [root@raos_apps01 ~]# fsck -b 98304 /dev/sdb1 fsck 1.39 (29-May-2006) e2fsck 1.39 (29-May-2006) fsck.ext3: Bad magic number in super-block while trying to open /dev/sdb1 The superblock could not be read or does not describe a correct ext2 filesystem. If the device is valid and it really contains an ext2 filesystem (and not swap or ufs or something else), then the superblock is corrupt, and you might try running e2fsck with an alternate superblock: e2fsck -b 8193 <device> =================================== Please consider the environment before printing this e-mail Cleveland Clinic is ranked as one of the top hospitals in America by U.S.News & World Report (2015). Visit us online at http://www.clevelandclinic.org for a complete listing of our services, staff and locations. Confidentiality Note: This message is intended for use only by the individual or entity to which it is addressed and may contain information that is privileged, confidential, and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient or the employee or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and destroy the material in its entirety, whether electronic or hard copy. Thank you. -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: http://lists.fedoraproject.org/admin/lists/users@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
