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disk failures and the system can still operate properly.
RAID 10
RAID 10 is a combination of RAID 1 (mirroring) and RAID 0 (striping), without
parity. RAID 10 is a stripe across a number of disks to provide fault tolerance
and high speed data transfer. The storage capacity of a RAID 10 group is equal to
the size of the disk with the smallest capacity in the array times (the number of
hard disks in the array/2). It is recommended that only hard disk drives of the
same brand and capacity are used to create a RAID 10 group. RAID 10 is suitable
for high volume transaction applications, such as a database, that require high
performance and fault tolerance. A maximum of 2 failed disks from up to one
drive.
RAID 50
RAID 50 is a combination of RAID 5 (distributed parity) and RAID 0 (striping). It is
recommended for applications that require high fault tolerance, capacity,
and random access performance. RAID 50 requires a minimum of 6 drives and can
overcome up to one drive failure in each RAID 5 array. The total storage capacity of
a RAID 50 array is the sum of its RAID 5 arrays. The total capacity of a RAID 5 group
is equal to the size of the disk with the smallest capacity in the array times the
number of (hard disk – 1). It is recommended (though not required) that only
hard drives of the same brand and capacity are used to establish the most efficient
hard drive capacity.
RAID 60
RAID 60 is a combination of RAID 6 (distributed double parity) and RAID 0
(striping). It offers higher fault tolerance than RAID 50, but uses an extra drive per
set for parity. RAID 60 requires a minimum of 8 drives and can overcome up to two
drive failures in each RAID 6 array. The total storage capacity of a RAID 60 array is
the sum of its RAID 6 arrays. The total capacity of a RAID 6 group is equal to the
size of the disk with the smallest capacity in the array times the number of
(hard disks – 2). It is recommended (though not required) that only hard drives of
the same brand and capacity are used to establish the most efficient
hard drive capacity.
Triple Mirror
Triple mirror aims to solve RAID 1 data loss risk if both the primary and mirror
drive fails or if there is a non-recoverable read error. Triple mirror writes data
simultaneously to three separate HDDs so if two HDDs, the system still has access
to data with no degradation in performance even as the drives are rebuilt. The
advantage is performance; the disadvantage is far less usable capacity.
RAID-TP
RAID TP (disk striping with triple distributed parities) is similar to RAID 5 and 6. It
stripes data across drives, but calculates for three parities that are written to three
individual disks. RAID-TP uses three independent equations to calculate each
individual parity that enables reconstruction of data when three disks and /or
blocks fail at the same time. RAID-TP can add an extra level of redundancy to help
Содержание EJ1600
Страница 31: ...31 EJ1600 Service Ports Onboard mini SAS Ports ...
Страница 39: ...39 3 Take off the top cover of the Storage Controller by uninstalling the screws 3 at the top 2 at each side ...
Страница 41: ...41 3 Take off the top cover of the Storage Controller by uninstalling the screws 3 at the top 2 at each side ...
Страница 46: ...46 Figure 4 Attach the screws 1 1 1 1 2 2 ...
Страница 50: ...50 Appendix C Product Compliance Class NAS Models FCC CE ES1640dc v2 Class A Class A ES1640dc Class A Class A ...
