ServeTheHome.com

Most people who build custom home servers will be able to articulate the cost per GB (cost/GB) of their drives. Yet this is a somewhat outdated metric. The major cost consideration that a lot of people overlook is port costs. Simply put, this is the cost to connect a hard drive to the system. For normal computer users this is often in the sub-$5 per port since they have open SATA connectors on their motherboards and open spots in their case making the cost of adding a drive the cost of a SATA cable. Home servers are a different story all together. A quick audit of the Big WHS showed that my port costs were approximately $46/ port. Compared to the $70 going price of a 1TB drive, this can be a huge portion of costs and is certainly appropriate to add to the cost/GB  equation.

Read the full story

Just as an update. I installed the second Adaptec 31605 today, filling all 16 ports with 8x WD Greens, 6x Hitachi 2TB, and 2x Hitachi 1TB drives. There is an additional 1.5TB Seagate 7200.11 being used as an OS drive. That’s 27.5TiB raw capacity.

Here’s a view of all the drives currently in The Big WHS. Note, I may have killed yet another WD Green. A single SMART error so I’m making quadruple sure that something isn’t wrong.

17 Drives, 27.5TiB Raw installed for testing

Read the full story

Introduction

For Small Business Servers and home servers, one thing becomes apparent, the need to use raid with large data sets. Raid 1 and software mirroring technologies like Windows Drive Extender are too cost ineffective for large storage arrays. For example, if one has 1 TB of storage need and uses one of these mirroring redundancy option, they need 1TB extra storage for a complete backup. Likewise, if an administrator uses four 1TB drives for data storage, then another four 1TB drives would be needed for redundancy. Raid 5 offers a user with both more performance than Raid 1 and lower “lost” capacity due to redundancy storage. Instead of effective storage capacity of n/2 for Raid 1, Raid 5 allows for n-1 of storage capacity.

Read the full story

Although more will follow, here’s a quick glimpse of what a cheap, but quality hardware raid solution can do with cheap, and large SATA drives in Raid 5. Keep in mind that the Perc 5/i uses the old IOP333 CPU clocked at 500MHz. Many current 3 series Adaptec products, for example, utilize the IOP333 at 800MHz. Also, one should note that there are reports that the IOP348 has some issues with SATA drives making the below representative of very inexpensive ($1000) raid arrays with huge capacities.

Raid 0 with 8 Seagate 7200.11 1.5TB drives with a Dell Perc 5/i 1MB stripe

Read the full story