SanDisk Extreme Pro SSD (240GB, 480GB & 960GB) Review: The Fastest Just Got Fasterby Kristian Vättö on June 16, 2014 4:00 PM EST
AnandTech Storage Bench 2013
Our Storage Bench 2013 focuses on worst-case multitasking and IO consistency. Similar to our earlier Storage Benches, the test is still application trace based - we record all IO requests made to a test system and play them back on the drive we are testing and run statistical analysis on the drive's responses. There are 49.8 million IO operations in total with 1583.0GB of reads and 875.6GB of writes. I'm not including the full description of the test for better readability, so make sure to read our Storage Bench 2013 introduction for the full details.
|AnandTech Storage Bench 2013 - The Destroyer|
|Photo Sync/Editing||Import images, edit, export||Adobe Photoshop CS6, Adobe Lightroom 4, Dropbox|
|Gaming||Download/install games, play games||Steam, Deus Ex, Skyrim, Starcraft 2, BioShock Infinite|
|Virtualization||Run/manage VM, use general apps inside VM||VirtualBox|
|General Productivity||Browse the web, manage local email, copy files, encrypt/decrypt files, backup system, download content, virus/malware scan||Chrome, IE10, Outlook, Windows 8, AxCrypt, uTorrent, AdAware|
|Video Playback||Copy and watch movies||Windows 8|
|Application Development||Compile projects, check out code, download code samples||Visual Studio 2012|
We are reporting two primary metrics with the Destroyer: average data rate in MB/s and average service time in microseconds. The former gives you an idea of the throughput of the drive during the time that it was running the test workload. This can be a very good indication of overall performance. What average data rate doesn't do a good job of is taking into account response time of very bursty (read: high queue depth) IO. By reporting average service time we heavily weigh latency for queued IOs. You'll note that this is a metric we have been reporting in our enterprise benchmarks for a while now. With the client tests maturing, the time was right for a little convergence.
Given that the Extreme II was already dominating the Storage Bench 2013, it doesn't come as a surprise that the Extreme Pro is the new crownholder. Even the SSD 730 and Vector 150 can't challenge the Extreme Pro despite the fact that in terms of pure random write performance they are better. I think SanDisk's strength lies in mixed read/write performance because write performance alone does not yield good results in real world workloads, which tend to be a mix of reads and writes.
In fact, client workloads (like our Storage Benches) are usually more read-centric anyway and in the case of the Extreme Pro, the drive spent over three times longer processing read IOs than write IOs, which makes sense because there are nearly four times more read IOs than there are write IOs in the trace (even though in terms of gigabytes the difference is only twofold).