after replacing a disk, /u01 cannot be mounted

[Olga_1]

HP-UX 11.31

Disk was replaced. Only one FS on vg01 has problem mounting:

mount /u01
UX:vxfs mount: ERROR: V-3-21268: /dev/vg01/u01 is corrupted. needs checking

fsck -F vxfs -o full -y /dev/vg01/ru01
fileset 999, invalid magic number in primary IAU 298
log replay in progress
fileset 999, invalid magic number in primary IAU 298
no valid ILISTs for fileset 999
UX:vxfs fsck: ERROR: V-3-25758: cannot re-initialize aggregate after replay
file system check failure, aborting ...

[singh sanjeev]

Is File system is on mirror copies, ? or you need to restore the data from the backup

[Patrick Wallek]

What steps did you take after replacing the disk? As asked above -- Was this disk part of a mirror?

What type of server is this in?  Is it a disk in the server itself or is the disk in some kind of disk array or enclosure?