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Related to RAID 5: RAID 10
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These shadow sections show an important fact that in the process of RAID 5 recovery, if there appear any bad sectors, RAID 5 data will be half-baked and it may cause some data to be damaged, or severe damage to the system, depending on the location of "shadow sections".
Because RAID 6 can recover the lost data even when two hard disks are damaged, recovering the damaged hard disk will not be affected if there are bad sector(s) in other hard disk(s); however, if there are more than 2 bad sectors occurring in the same horizontal section, RAID 6 will meet same problem as RAID 5, but the potential is extremely low.
Each RAID 5 array is typically connected to a separate UPS and has redundant AC connections.
A RAID 5 write operation will typically perform the following command sequence:
AMCC recommends controller cache and disk cache remain on during SATA RAID operations as well as providing increased levels of array performance during degraded RAID 5 operations.
Today, the ultimate protection for critical information is accomplished through RAID 1 (mirroring), overlaying RAID 5 (striping with parity), and then adding a global hot spare.
6 TB of fault tolerant storage per controller and deliver in excess of 400 Mbytes per second sequential RAID 5 reads(a) and over 110 Mbytes per second RAID 5 sequential writes.
6 TB of fault tolerant storage per controller and deliver in excess of 400 Mbytes per second sequential RAID 5 reads(1) and over 110 Mbytes per second RAID 5 sequential writes.
Its "on-the-fly" hardware exclusive-OR (XOR) engine eliminates the traditional read-modify-write sequence associated with mainstream striped-parity RAID engines and effectively doubles performance as compared to RAID 5 cards in similar applications, for example, at as little as one-seventh the cost.
The SureVAULT RAID 5 Desktop Solution stripes data to three drives simultaneously.
The result is improved I/O throughput, complete fault isolation and an optimized hardware platform for 3ware's innovative firmware, which further enhances the system's RAID 5 features and performance.
To ensure unparalleled access to stored files, ExtremeStor SC also provides RAID 0, 1, 0 +1, 3, and standard RAID 5 support.