BUSINESS COPY ISSUE :I/O ERROR

Business copy Issue : Client reported for FS missing from the system , Bakcup is not happening for 2-days
On first look it clearly look that Resync has happen without VG got export. and left the disk in unavaialble
state.
As resync overwrite the metadata structure of primarry copy to secondary copy so it understandable that kernal
have marked the PV status unavailable on SVOL server.
And FS are noted with I/O error.
Below is screen output :
[FP9](Mercury)/u01/app/oracle/admin/FP9/diag/rdbms/FP9mop/FP9/trace-> bdf
ftp.htp.com:/var/opt/ignite/clients
                   56426496 16764759 37186635   31% /var/opt/ignite/recovery/client_mnt
bdf: /oracle/admin/FP9: I/O error
bdf: /oracle/oradata02/FP9: I/O error
/dev/vg_FP6_BKP/lv_oracleFP6_sapdata1
                   523239424 97319432 422593120   19% /oracle/FP6/sapdata1
/dev/vg_FP6_BKP/lv_oracleFP6_sapdata2

[FP9](Mercury)/u01/app/oracle/admin/FP9/diag/rdbms/FP9mop/FP9/trace-> df -P | grep FP9
df: cannot determine file system statistics for /dev/vg_FP9_BKP/lv_oracleoradata02_FP9
df: cannot determine file system statistics for /dev/vg_FP9_BKP/lv_oracleadmin_FP9
Solution :
To resolve the issue,
#umount the FS which are showing I/O errror , else in some case reboot may be required.
#export the vg manual
#resync the PVOL and SVOL
#split and again vgimport for creation of FS.