I just inherited a HP StorageWorks MSA60 (this is a direct-attach SAS enclosure).
I had to move it to another shelf so I turned off the computer which was using it. I also pulled the 2 power cords off the MSA60 (no power button, so the only option was to disconnect from main power).
Once the device was in its new rack, I plugged the 2 power cords in and... nothing.
The fans are okay (I hear them). If I push the UID button, the corresponding light is okay. But the disks's LEDs stay off, and the disks stay off.
No power button on this device. So how to turn it on ?
The Storageworks MSA60 enclosure has a "soft" power button. It does not power on automatically. When the power cables are connected, the unit defaults to a standby state.
Here's the rear of the HP StorageWorks MSA60 enclosure...
On the right side of the rear of the unit, there's a module next to the right power supply which has a soft power button in the upper-right of the module, using the universal standby signal.
My experience with a power outage, is that the MSA60 will power back up just fine.