uncleflo
Registered since September 28th, 2017
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11 Tips for Welding Aluminum in the Shipbuilding Industry
Saved by uncleflo on December 20th, 2019.
Aluminum alloys are lightweight and corrosion-resistant in marine environments, making the superior material for use in the shipbuilding industry. There are two aspects that make general aluminum welding different from welding steel in the shipbuilding industry, and both are related to the fact that much of the welding is performed outdoors: Both aspects will be discussed in more detail on the next few pages. Know Which Aluminum Alloy You Are WeldingIt isn’t enough to know that you are welding aluminum. Welding professionals have to know which alloy is about to be welded, and they have to know the correct filler metal to use. The most common alloys used in shipbuilding are the Al-Mg 5XXX sheet alloys and the Al-Mg-Si 6XXX extrusion alloys, primarily because of their excellent resistance to corrosion.
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dd - writing zeros - general question
Saved by uncleflo on August 23rd, 2013.
Can't figure out why using dd to write zeros to a hard drive is so slow. Yesterday, I prepped a hard drive for a friend and did the standard command: dd if=/dev/zero of=/dev/sda The machine I used has a Core 2 Duo 2.4 Ghz cpu, 2 Gigs of DDR2 800 RAM, a new Intel mobo, and a Western Digital 250 gig. SATA drive with 16 meg. cache. The result was 30,482 seconds (approx. 8.5 hrs.) to write zeros to the entire 500 Gig. drive, at an average rate of 16.4 MB/sec.
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How to securely erase the hard disk before selling ones computer | All about Linux
Saved by uncleflo on September 6th, 2011.
There are times when the news sites are abuzz with sensational news items. I am speaking of those news items which tempts one to pitch in and have his/her say come what may. And the news of someone who bought a laptop on ebay only to find it defective and how he took revenge on the seller by posting all the personal data on the hard disk on a website is by now a legend.
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