https://community.hpe.com/t5/disk-enclosures/how-to-install-use-acu/m-p/4239351#M27901 Katkota,<BR /><BR />You need to boot from the SmartStart CD and it will get to a point where it gives you the options to install an OS or perform maintenance on the server. You should go to "Perform Maitnenance". One of the options" there is to run the ACU.<BR /><BR />Phil Wed, 23 Jul 2008 19:36:38 GMT Phillip Thayer 2008-07-23T19:36:38Z https://community.hpe.com/t5/disk-enclosures/how-to-install-use-acu/m-p/4239350#M27900 How can i get to/install ACU on my Smart Array P400?<BR />BTW: I do not have OS installed on that server where i have those disks (proliant DL320s) Wed, 23 Jul 2008 19:02:06 GMT https://community.hpe.com/t5/disk-enclosures/how-to-install-use-acu/m-p/4239350#M27900 Katkota 2008-07-23T19:02:06Z https://community.hpe.com/t5/disk-enclosures/how-to-install-use-acu/m-p/4239351#M27901 Katkota,<BR /><BR />You need to boot from the SmartStart CD and it will get to a point where it gives you the options to install an OS or perform maintenance on the server. You should go to "Perform Maitnenance". One of the options" there is to run the ACU.<BR /><BR />Phil Wed, 23 Jul 2008 19:36:38 GMT https://community.hpe.com/t5/disk-enclosures/how-to-install-use-acu/m-p/4239351#M27901 Phillip Thayer 2008-07-23T19:36:38Z