I can see the my harddisk in /dev as hd1t77
when I mount it to /fs/temp
mount -t qnx4 /dev/hd1t77 /fs/temp
it said:
mount:can’t mount /type qnx4
mount:possible reason:no such device or address

Is the harddisk wrong? before I can mount it,now I can find it in BIOS.

Just try without -t qnx4, at least we do not use this type definition to mount :stuck_out_tongue_winking_eye:

Btw. is there already a filesystem initialized?