The fastest fault tolerant array configuration
but the least storage efficient array, it's probably
the most commonly used system today. As other
array configurations require three or more drives,
it is the only choice in a two-drive system. The
two drives in the 'mirrored pair' appear to the
operating system as one; they always mirror each
other. Should a drive fail the data is available
from the other. If you cannot access data from
either of the mirrored arrays, you must be having
a bad day because this is the most reliable storage
As the data is always the same on the two
drives, read performance is almost doubled, as
consecutive reads can occur on each drive at the
same time. Write performance is not improved.
If you have any problem with RAID 1, find out
which array is problematic and try to access the
data from the other array. If you cannot access
data from either of the arrays then at that stage
you need professional help for data recovery.
Further tries to recover data yourself may lead
to more damage to problematic hard drives in the
array. This will increase data recovery cost and
in some cases, it even makes data recovery impossible.
If you had any questions, feel fry to call us
for further assistance.