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Fault
Tolerant FlashDisk
RAID
Fault
Tolerant FlashDisk
RAID
How
much Fault Tolerance?
Investments in
fault tolerant
equipment always
sound like a good,
albeit expensive
idea. More redundancy
is always better
but always costs
more - so where
do you draw the
line?
Server
Downtime - Empirical
Data
Now you can make
quite reasonable
estimates of the
actual savings
you and your organization
may enjoy by adopting
fault tolerant
FlashDisk RAID
disk arrays from
Winchester Systems.
The key step is
determining how
much downtime
can be saved with
a fault tolerant
environment. The
critcal facts
in the analysis
are the empirical
results of a study
performed by Intel
Corp. They found
that the typical
server (PC server
in their case)
will generate
27.2 hours of
downtime annually.
More importantly,
they pinpointed
the problem by
source, highlighted
in the pie chart
below.
Attacking
Downtime
FlashDisk RAID
disk arrays combined
with optionally
redundant servers
together attack
the most frequent
causes of hardware
failure which
comprise the bulk
of server failures
including disks,
power supplies,
fans, disk controllers,
and optionally
the entire server.
Winchester
Systems has determined
that FlashDisk
will typically
reduce the downtime
by 82% to 4.9
hours annually
based upon the
use of redundant
disk array components
and RAID technology.
FlashDisk
“hot-swap”
components. RAID
data
integrity and
redundant components
dramatically
increase server
availability.
FlashDisk
RAID levels 1,
3, 5, 0+1 protect
data in the event
of disk drive
failure. Parity
data is used to
automatically
rebuild a failed
drive on the “hot-spare”
while user jobs
continue uninterrupted.
FlashDisk is equipped
with redundant
power supplies
and fans to keep
the disk array
running even if
a power supply
or cooling fan
fails.
FlashDisk
RAID 15 configurations
add server, disk
controller and
SCSI bus redundancy
capabilities and
can withstand
multiple simultaneous
component failures
in the disk array.
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