Many of you have heard about the changes we've made in Exchange 2010 that combine to give you the ability to use less expensive storage and deploy large mailboxes. There have been many discussion...
Updated Jul 01, 2019
Version 2.0
Blog Post
CY- Yes, MSIT utilizes 7.2K nearline SAS. There are a few reasons for this.
1. MSIT designed and implemented its storage infrastructure for the Exchange 2010 rollout 1.5 years ago - before the product development cycle had completed (i.e., before all of the IO reduction work was completed and checked into the product). Therefore, they chose a disk that could produce more IOPS compared to 7.2K SATA equivalent. It should be noted that the 7.2K SAS shares low cost mechanics with 1TB 7.2K SATA counterpart, however, so there isn't a great cost differential here.
2. SAS does provide a more robust transport which allows for resetting individual disks, as opposed to, resetting the bus.
Our Outlook Live service (22 million mailboxes) runs on 7.2K SATA.
So in summary, both 7.2K SAS and 7.2K SATA are viable choices. You need to consider the mechanics, the storage chassis, the capacity, IO perforimance, and the annualized failure rates when deciding on which disk you should utilize in your infrastructure.
Ross
1. MSIT designed and implemented its storage infrastructure for the Exchange 2010 rollout 1.5 years ago - before the product development cycle had completed (i.e., before all of the IO reduction work was completed and checked into the product). Therefore, they chose a disk that could produce more IOPS compared to 7.2K SATA equivalent. It should be noted that the 7.2K SAS shares low cost mechanics with 1TB 7.2K SATA counterpart, however, so there isn't a great cost differential here.
2. SAS does provide a more robust transport which allows for resetting individual disks, as opposed to, resetting the bus.
Our Outlook Live service (22 million mailboxes) runs on 7.2K SATA.
So in summary, both 7.2K SAS and 7.2K SATA are viable choices. You need to consider the mechanics, the storage chassis, the capacity, IO perforimance, and the annualized failure rates when deciding on which disk you should utilize in your infrastructure.
Ross