With the RevoDrive Hybrid, OCZ has another PCI Express SSD in their portfolio, but this time RevoDrive comes with an additional 1 Terabyte 2.5 inch HDD on top. Using a caching software the manufacturer wants to combine the advantages of both worlds. How good this all works, that's what we're going to reveal on the following pages.
Specifications / Delivery
||OCZ RevoDrive Hybrid 120 Gigabyte SSD, 1 Terabyte
||120 Gigabyte SSD, 1 Terabyte HDD (2.5'')
||NAND Flash, Hard drive
||synchronous Micron NAND,
910 MB/s reading, up to 810 MB/s writing
Random Read IOPS: 65'000
Random Write IOPS: 120'000
||Idle: 8.1 Watt
Load: 10 Watt
||< 0.1 ms
||Dataplex Caching Software
Behind the scenes
The RevoDrive Hybrid with 120 Gigabyte NAND flash
memory and a 1 Terabyte hard drive comes with two SandForce SF-2281 controllers. In principle the RevoDrive
Hybrid is based on two individual SandForce SF-2281 SSDs with 60 Gigabyte
capacity. Like the RevoDrive 3 the Hybrid now comes with an improved design. Therefore it doesn't feature the SATA-to-PCI-X-to-PCIe chain OCZ has actually put a 4-port 6 Gbps SATA-to-PCI-e-x4 bridge chip onto the PCB of the RevoDrive
Hybrid. This means that the two SF-2281 controllers get a full 2 Gigabyte/sec of raw bandwidth.
To combine the best of both worlds - SSD and HDD - a caching software is being
needed. In the box you find a licence key for the Dataplex caching software. In
order to the the software you have to register your key on the OCZ Website. Once
this is done you get a download link. As soon as you've downloaded the software
you can start setting up the RevoDrive Hybrid. You need to perform a clean
install of Windows 7 on the Hybrids hard drive. Therefore the appropriate driver
needs to be fed to the operating system during the installation process. Once
the installation has finished you can install the Dataplex software. This will
make a process run in the background which analyzes usage patterns and saves
files appropriately to get maximum performance.
Like the RevoDrive 3 the Hybrid also comes with a SAS bridge chip.
Using this chip OCZ has been able to implement hardware support for TRIM. Futhermore it is also possible to read out SMART data. Both, TRIM as well as SMART wasn't supported the Revo 2. A special agreement with the manufacturer of the bridge chip allowed OCZ to change the firmware that it now supports the features we've just mentioned. But still there is a downside: although the Revo 3 supports TRIM, Windows 7 doesn't. In fact Windows 7 doesn't support SCSI unmap which is the SCSI-equivalent to SATA-TRIM. OCZ told us that they're working together with Microsoft in order to address this issue but it will take some time until Microsoft will officially
implement this. A worst case scenario could be that it will take until the realease of Windows 8 until SCSI unmap is supported with Windows.
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