how to delay usb disks on AC87U

Hi all,

I have two hdds, with 4 partiton.

UUID=ff566fb4-d01d-49ca-b01d-c68b1afcc190 swap swap defaults 0 0
UUID=bfd1a872-4008-4ace-9468-1b9fe3fcb9cc /tmp/mnt/optware-ng ext4 rw,nodev,relatime,barrier=1,data=ordered 0 0
UUID=e97a6f5d-dade-4ad5-9ba1-48505444fa21 /tmp/mnt/data1 ext4 rw,nodev,relatime,barrier=1,data=ordered 0 0
UUID=d3d00527-fc54-48ce-825f-25014446d722 /tmp/mnt/data2 ext4 rw,nodev,relatime,barrier=1,data=ordered 0 0


the services...

how to delay usb disks on AC87U