<div>My recommendations are as follows. Use recovery software +i.e. parted magic) to retrieve all important data. Throughly vacum and dust the interior of said machine. Purchase a new hdd and perform. A fresh install of os. Restore salvaged data from step 1. Sent from my android device. -----Original Message----- From: Colin Law <clanlaw@googlemail.com> To: "Ubuntu user technical support, not for general discussions" <ubuntu-users@lists.ubuntu.com> Sent: Wed, 21 Aug 2013 3:25 AM Subject: Re: "reboot and select proper boot device or insert boot media in selected boot device and press a key" </div>On 20 August <a href="tel:201323">2013 23</a>:46, Qiubo Su (David Su) <<a href="mailto:qiubosu@gmail.com">qiubosu@gmail.com</a>> wrote: > ... > it is a seagate 500GB HD made in china manufactured in 2008. i used it as a > linux 24x7 server for the past nearly 1.5 years. the server is in the office > room and its temperature is from 10 C to 25 C, ventilation is good, not > dusty. the server was stably sitting on the desk without physical collision. > > what could make it got such problem in 1.5 years time in such a OK > environment? Things break for no obvious reasons. That is true of all electronic and electro-magnetic components. Possibly a poorly soldered connection, possibly a faulty bearing on the disc, a faulty capacitor, a cosmic ray through one of the chips, many possible causes. By the way it is preferred not to top post on this list. Please insert your replies inline in the previous post as others have been doing. Thanks. Colin -- ubuntu-users mailing list <a href="mailto:ubuntu-users@lists.ubuntu.com">ubuntu-users@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-users">https://lists.ubuntu.com/mailman/listinfo/ubuntu-users</a>