how can i get back my xfs partrition?

[吉佳盛 <jasper@xxxxxxxxxxxxxx>]

dear all,
when i mount my xfs partition, i got msgs as following:

[root@file2 root]# mount -t xfs /dev/sda1 /home1
mount: /dev/sda1: can't read superblock
[root@file2 root]# xfs_repair /dev/sda1
Phase 1 - find and verify superblock...
superblock read failed, offset 874959994880, size 2048, ag 4294967295, rval
16

fatal error -- Input / Output error

what can i do to get back my xfs partrition?

thank you in advance!!

Jasper Ji