On Tue, May 6, 2008 at 3:11 PM, Ed Morrison <<a href="mailto:edward.morrison@gmail.com">edward.morrison@gmail.com</a>> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Situation:<br>
My current storage needs are approximately 1.5 TB annually. This will increase to about 3.5 TB annually over the next 5 years (rough est.). This box will just be a data archive and once it is full it will only be used very infrequently if not used at all. Files are small up to 10 MB but numerous.<br>
</blockquote></div><br>The solution I found best was to buy a 2U server that has 8*750GB disks, though they'd probably be 1TB today. Put the disks into a RAID 5 or 6. Using hardware RAID, divvy them up into one 50GB drive, and one really large drive. Put the OS on the 50GB drive, mount the really big drive. <br>
<br>Now you have a 50GB drive and a 7*750-50 drive. When you fill that up, just buy another 2U server. When you do fill it up, the next one will be cheaper and or bigger.<br><br>The keys to this type of setup are:<br>1) Don't buy storage you'll need next year today. The best time to buy this kind of hardware is right before you need it.<br>
2) Look at the overall cost per gigabyte. That's the metric that drives things.<br>3) Understand your tolerance for downtime and data protection. If you have another copy, or a backup, and its not mission critical data, its much cheaper not to waste disks on redundancy.<br>
<br>We have tape backups of our systems, and factoring in the cost of tape and other costs, its still possible to get storage with a marginal cost below $1 / GB. That includes a 3 year warranty, quad core processor, 4GB of RAM which you can probably put to use elsewhere.<br>
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