With the RevoDrive 3 X2, OCZ shows the remake of the their very successful PCI-Express SSD for the enthusiast market. The main difference to the predecessor concerns the controller: they make now use of the SF-2281 which is quite a lot faster than its predecessor.
Specifications / Delivery
||OCZ RevoDrive 3 X2 480 GByte
||4 x SandForce SF-2281
1'500 MB/s reading, up to 1'225 MB/s writing
||< 0.1 ms
||1'000'000 hours (MTBF)
Behind the scene of the Revo 3
RevoDrive 3 X2 with 480 Gigabyte NAND flash comes with no less than four
SandForce SF-2281 controllers. In principle the RevoDrive 3 X2 is based on four
individual SandForce SF-2281 SSD with 120 Gigabyte. Compared to the predecessor,
the Revo 3 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 Revo 3. This means that the
four SF-2281 controllers get a full 2 Gigabyte/sec of raw bandwidth.
Comared to the predecessor there are
even more improvements. The SAS bridge chip OCZ makes use of now also offer
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 address this. The worst case
could be that it will take until the realease of Windows 8 until SCSI unmap is
supported with Windows.
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