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Mostly when we design any Any Exchange infrastructure we need to calculate the correct IOPS.

If we fail to calculate the correct IOPS then we may end up performance issues like delay in the mail delivery, Log committing to the database, database mounting, Log copy or replay queue.

So today I am highlighting the standard possible IOPS we can get from the Disk.

The below Table will explain the Disk IOPS.

So you have to multiple the IOPS number to the number of disks you will use in your exchange storage to get the maximum possible IOPS of your storage.

 

 

Disk Drive	Random Disk I/O	Sequential Disk I/O
5.2K RPM SATA 2.5″	55	300
5.4K RPM SATA 2.5″	55	300
5.9K RPM SATA 2.5″	55	300
5.2K RPM SATA 3.5″	50	300
5.4K RPM SATA 3.5″	50	300
5.9K RPM SATA 3.5″	50	300
5.2K RPM SAS 3.5″	52.5	300
5.4K RPM SAS 3.5″	52.5	300
5.9K RPM SAS 3.5″	52.5	300
7.2K RPM SATA 2.5″	60	300
7.2K RPM SATA 3.5″	55	300
7.2K RPM SAS 2.5″	62.5	300
7.2K RPM SAS 3.5″	57.5	300
10K RPM SAS 2.5″	165	300
15K RPM SAS 2.5″	230	300
10K RPM FC/SCSI/SAS 3.5″	130	300
15K RPM FC/SCSI/SAS 3.5″	180	300

 

Feel free to review the wiki here

Once you have the possible IOPS then compare the required IOPS with the Exchange server role calculator.

Exchange Server Role Calculator can be downloaded from here.

Look for the following table on the Role Requirements worksheet

 

 

Host IO and Throughput Requirements	/ Database	/ Server	/ DAG	/ Environment
Total Database Required IOPS	0	0	0	0
Total Log Required IOPS	0	0	0	0
Database Read I/O Percentage	0%	—	—	—
Background Database Maintenance Throughput Requirements	1.0 MB/s	MB/s	MB/s	MB/s

 

 

If you find Exchange server role calculator IOPS is lower than the disk IOPS then you are good to go ahead for the Exchange storage usage.

 

Prabhat Nigam

Microsoft MVP | Exchange Server

Team@MSExchangeGuru

Posted March 21st, 2014 under Exchange 2013. RSS 2.0 feed. Leave a response, or trackback.