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Bank Switching

Can anyone give me a professional explaination of what they mean by Bank Switching.??
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Dreamer1
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Dreamer1
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nfroioCommented:
In relation to what?

RAID
RAM
???
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Dreamer1Author Commented:
Raid
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nfroioCommented:
I am not absolutely sure, but I think that this is what you are refering to:

R = Redundant
A = Array of
I  = Independant or Inexpensive
D = Disks

RAID Bank Switching:

         Refers to banks, also called bays of disks, in RAID, multiple disks operate both independant of each other, while still working with each other. RAID systems are generally rack-mounted, with one disk sitting in whats called a bay or bank, if this disk fails, switching disks is as easy as pulling out the bad disk bay or bank, and installing another disk in the bay or bank and mounting it back into rack.
       
Hope that helps.

nfroio


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nfroioCommented:
This might also add clarity: Taken from Pacific Computer Expansions, Inc. website, they sell RAID systems, ignore their sales stuff, and you should get the idea about hot swapping and failures.

Automatic Network Processor Failover
  Automatic Network Processor Failover (ANPF) allows
  Synchronection 2 to remain fully active on your network,
  delivering data at gigabit speeds, even in the event of a network
  processor failure. If one of the servers should fail, the Synch OS
  detects the failure instantly, checks all components automatically
  and directs the remaining processor to satisfy all I/O requests and
  manage all data. The Synchronection 2 processors are field
  replaceable units and a failed processor can be replaced without
  service interruption.


  The Highest Level of Redundancy
  The Synchronection 2 is immune to the failure of any component.
  All active components are redundant and hot-swappable so that
  any failed component can be replaced non-disruptively on-line to
  quickly return the system to full redundancy and fault tolerance.
  The Synchronection 2 is SCSI Enclosure Service (SES) compliant
  and peforms active environmental monitoring of itself and all
  attached storage.


  High Availability Data Protection
  Data protection is performed flawlessly by the Synchronix 2000
  storage system. The heart of data protection is the active/active
  RAID controller architecture and full 2N redundancy of all active
  components. This active/active architecture provides for fully
  independent storage controller failover seamlessly in less than 250
  milliseconds. Should either controller fail, the second controller
  immediately takes over the responsibility for users and data that
  were assigned to the now failed controller. ECCS is able to
  acheive this virtually undetectable transfer due to several
  architectural innovations. First, the critical status data of each
  controller is constatly written and stored in NVRAM and is
  automatically replicated on the other controller. If a controller
  fails, the other knows the state of the failed controller. The
  working controller then takes over the target IDs of the failed
  controller, pending I/Os and any rebuilds that are outstanding. The
  working controller then handles all I/O operations until the failed
  controller is replaced, restoring data protection to the highest
  level. Secondly, the architecture incorporates two independent
  uni-directional buses for cache coherency (mirroring). Each bus
  can operate at sustained speeds of 120MB/s. This unique
  architectural approach, similar to technology previously found
  only in circuit-redundant systems, provides cache replication at
  much improved response times.
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Dreamer1Author Commented:
Thankyou
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