RamSan-720 is the first high
availability storage device from Texas Memory Systems. With no single point of
failure, 2D Flash RAID™, and latency under 100 µs, the RamSan-720 is the
ultimate in performance and data protection.
Some applications provide high availability features in software, which is
usually sufficient when a single application is run on a RamSan. However,
software-based high availability is not an option when running multiple
applications. In addition, some applications (like cloud platforms and
virtualization environments) lack built-in high availability. The RamSan-720
is the high performance answer for providing hardware based high availability
for heterogenous multitenant applications.
The RamSan-720 boasts the following high availability
- No single point of failure (SPOF)
- Four layers of data correction, including 2D Flash
- Fully redundant components (providing redundant
power, data, and management paths)
- Hot swappable Flash Modules
- Low-power components that run cooler than
competitors (addressing the problem of premature Flash failure due to
Since the RamSan-720 uses hardware to provide these
features, this SSD does not suffer a hit in performance, unlike competitors
that supply high availability through software. In fact, the RamSan-720
generates similar performance numbers to its RamSan-710 sibling: 400,000 IOPS
and 5 GB/s bandwidth. The RamSan-720 also boasts write latency numbers that
rival RAM-based storage: only 25 µs (with 100 µs read latency).
The RamSan-720 offers high availability, no single point
of failure, scalable performance, and affordable high capacity that is both
space and power efficient. A single unit provides up to 12 TB of reliable
Single Level Cell (SLC) Flash, with solid performance of up to 5 GB per
The RamSan-720 packs a lot of power and
reliability into a small package, occupying only 1U of rack space. To achieve
similar performance, hard disk solutions would require over 1,300 drives,
occupy almost 100 disk enclosures requiring seven racks, consume over 16,000
Watts, and cost over a million dollars by the time the enclosures and
controllers were included.
Each RamSan-720 unit can support four 8 Gb/s Fibre
Channel or four 40 Gb/s QDR InfiniBand ports. Installation and management are
simple, with embedded management capabilities and clear displays. One or more
RamSan-720s can easily be integrated into a mixed storage infrastructure and
monitored and managed through a common management framework.
RAID Data Protection
Previous RamSan SSDs protect your data with three
levels of correction: ECC, Variable Stripe RAID™, and module-level RAID 5. The
RamSan-720 ups the ante with a fourth level of data correction: system-level
2D Flash RAID™ combines the protection of module-level
and system-level RAID 5. Texas Memory Systems is the only SSD vendor that
protects your data both within
and across Flash Modules.
Low Power Usage
Unlike competing products, RamSan SSDs use
custom-designed hardware, not repurposed server parts that rely on software to
do the heavy lifting. By using purpose-built hardware, the RamSan-720 delivers
efficient high performance.
The RamSan-720 incorporates embedded CPUs, DDR chips,
buses, and simple interfaces that use up to 75% less power than competitors.
These low power components can help slash your electricity bill.
Excessive heat is one of the leading causes of
premature Flash failure. Since Flash failure leads to unscheduled downtime, a
true high availability solution must take this problem into account. Because
of the RamSan-720's efficient, low power components, it runs dramatically
cooler than competing SSDs.
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The RamSan-720 uses SLC NAND Flash as its storage
medium. SLC is superior Flash technology as it is faster, more resilient, and
much easier to manage than consumer-grade MLC Flash. In addition, the
RamSan-720’s SLC Flash memory is completely non-volatile.
At the system level, the RamSan-720 allows you to
designate one of the Flash Modules inside the system as a hot spare that works
hand-in-hand with the RamSan-720's levels of RAID protection. If one of the
modules experiences a chip failure that degrades its RAID protection, the
system will dynamically migrate the data on that module to the spare to return
to a redundant state. At that point, the degraded module will be inactive and
can be swapped during the next scheduled maintenance downtime. Having the hot
spare means that a faulty card can be swapped in a matter of minutes without
the need to migrate all the data off and back on to the RamSan.
Logical Storage Units (LUNs) can be designated in
multiple configurations, including the option of assigning a separate LUN to
each of the RamSan-720’s Flash Modules. This flexibility allows you to mirror
LUNs for increased data protection.
Automatic Error Checking
Data integrity is provided through two different
methods. Each Flash chip incorporates an ECC data field within the chip for
initial checking. Additionally, each Flash controller in the RamSan-720 is
responsible for 20 Flash chips using TMS' patented Variable Stripe RAID (VSR),
eliminating any single chip or plane failure from corrupting data storage. The
Flash wear-leveling algorithm runs on the embedded PowerPC processor,
providing real-time quality assurance independent of the host computer.
The RamSan-720 was designed from the chip up with the
enterprise in mind. With its onboard processor design, four levels of error
protection, Variable Stripe RAID functionality for the Flash, use of SLC
Flash, and a sophisticated wear leveling algorithm, the RamSan-720 is a truly
enterprise ready, resilient SSD.
The RamSan-720 includes Texas Memory System’s
proprietary wear-leveling technology. This system protects the SSD's Flash
media by spreading out writes and maximizing the write life of the system.
Next-Generation Series-7™ Product Family
RamSan Series-7 is the 7th generation of the RamSan
product family, originating from the first RamSan in 2000. All Series-7 RamSan
products deliver cost-effective performance and reliability.