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Toshiba Q Series Pro 256GB Three-Drive SSD RAID Report

By: Jon Coulter | RAID in Storage | Posted: Aug 6, 2014 2:00 pm





Toshiba's Q Series Pro 256GB SATA III SSD is available in three capacity sizes, 128GB, 256GB, and 512GB. Specifications list the 256GB Q Series Pro SSD as capable of 554MB/s sequential reads, and 512MB/s sequential writes. Random read/write speed is not listed. The Toshiba Q Series Pro is available in a 2.5" x 7mm z-height form factor. It also ships with a spacer, should you need to increase the drive's thickness to 9.3mm. Toshiba backs the Q Series Pro with an industry standard three-year warranty.


Because this is a RAID review, we are going to focus on performance rather than features. For a more in-depth look at the Toshiba Q Series Pro feature set, I will refer you to Chris Ramseyer's extensive review of Toshiba's Q Series Pro.



Drive Details - Toshiba Q Series Pro 256GB SSD




Toshiba's Q Series Pro comes packaged in an attractive box colored black, green, and white. There is a picture of the drive on the front of the box. The front of the box also states the drive's capacity, its SATA III interface, and that the drive is a slim 7mm in thickness. Sequential read/write speed is listed here as well.




The rear of the box lists some attributes of solid state drives.




The Q Series Pro ships with a warranty guide, a quick installation guide that tells you how to download the included NTI Echo cloning software, and a plastic spacer that can be used to increase the drive's thickness, should you need to do so.




The top of the drive's enclosure is formed from a single piece of stamped aluminum that is natural in color. There is a blue and white sticker centered on the front of the drive.




The bottom and sides of the enclosure are made from another piece of naturally colored, stamped aluminum. There is a sticker that lists the drive's part number, serial number, capacity, and shipping firmware revision.




Here's what Toshiba's Q Series Pro 256GB SSD looks like completely disassembled. The drive's controller and BGA NAND packages all have thick thermal pads stuck to them. These thermally conductive pads wick heat from the chips, and into the drive's aluminum enclosure. We removed a couple of the thermal pads to get a better look at the NAND packages, and the controller. There are eight Toshiba branded 32GB 19nm MLC Toggle Mode BGA NAND packages on this side of the PCB. The drive's controller is branded Toshiba, and there is no DRAM buffer.



Test System Setup




- Drive Properties




The majority of our testing is performed with our test drive/array as our boot volume. Our boot volume is 75% full for all OS Disk "C" drive testing to mimic a typical consumer OS volume implementation. We are using 64k stripes for our two and three drive arrays, and 32k stripes for our four to six drive arrays. Write caching is enabled, and Windows buffer flushing is disabled.


All of our testing includes charting the performance of a single drive, as well as RAID 0 arrays of our test subjects. We are utilizing Windows 8.1 64-bit for all of our testing. We will be posting screen shots of our drive array benchmarks.

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