New SATA drive going to sleep?

[Gary Smith]

I've a NAS Buffalo LinkStation Live HS-DHGL

I've installed a Western Digital WD5000AAKS drive in the unit and rebuilt
the firmware etc etc.

I've setup shares and can copy data to them. But after about ten minutes I
can no longer access the shares. I can still see th4e NAS in the Navigator,
and can access the printer, and Info Share, and the Web Client.

If I reboot the NAS then I can see the shares again, but even when I'm
writing data I loose access.

I think the Western Digital WD5000AAKS is going to sleep and then can't be
seen by the NAS itself.

Do you know if there is a setting the the Web Interface to stop the drive
sleeping?

Can I prevent the WD500AAKS going to sleep?

Thanks