<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>dsr_</author><text>Important information that will drastically affect actual usage not provided:
- expected and guaranteed lifetime of discs
- minimum undamaged read&amp;#x2F;write speeds
- recoverable-error read speeds
- bit error rate for writing and reading&lt;p&gt;Let&amp;#x27;s take a typical small business system&amp;#x27;s requirements. We have a 2U database with 12 3.5&amp;quot; hot-swap disks, 2 200GB SSDs for caching and 10 3TB disks in a RAID10. We have up to 15TB that we want to archive.&lt;p&gt;Optimism: we get 100MB&amp;#x2F;s write speed and a write BER of 10^-15. We swap 30 500GB disks, each taking about an hour and a half to write, and about one in a thousand disks has an unrecoverable error.&lt;p&gt;More likely: we get 75MB&amp;#x2F;s sustained write speed and a write BER of 10^-14. We swap 30 500GB disks, each taking close to two hours, and we can expect one in three complete sets to have an unrecoverable error.&lt;p&gt;Press releases: not quite useful.</text><parent_chain></parent_chain></comment><story><title>Sony and Panasonic announce the Archival Disc format</title><url>http://www.sony.net/SonyInfo/News/Press/201403/14-0310E/index.html</url></story>
<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>Pitarou</author><text>This makes perfect sense.&lt;p&gt;Sony and Panasonic need to do &lt;i&gt;something&lt;/i&gt; with their lead in optical disk technology, but there&amp;#x27;s no demand for a Blu-ray successor.  Heck, there isn&amp;#x27;t even much demand for Blu-ray. So archiving is the way to go.&lt;p&gt;I just hope they make those things to last.</text><parent_chain></parent_chain></comment><story><title>Sony and Panasonic announce the Archival Disc format</title><url>http://www.sony.net/SonyInfo/News/Press/201403/14-0310E/index.html</url></story>