Biostar IDEQ 330P MANUAL - Page 19

RAID 1, Spanning JBOD - manual

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RAID 1: Every read and write is actually carried out in parallel across 2 disk drives in a RAID 1 array system. The mirrored (backup) copy of the data can reside on the same disk or on a second redundant drive in the array. RAID 1 provides a hot-standby copy of data if the active volume or drive is corrupted or becomes unavailable because of a hardware failure. RAID techniques can be applied for high-availability solutions, or as a form of automatic backup that eliminates tedious manual backups to more expensive and less reliable media. Features and Benefits 4 Drives: Minimum 2, and maximum is 2. 4 Uses: RAID 1 is ideal for small databases or any other application that requires fault tolerance and minimal capacity. 4 Benefits: Provides 100% data redundancy. Should one drive fail, the controller switches to the other drive. 4 Drawbacks: Requires 2 drives for the storage space of one drive. Performance is impaired during drive rebuilds. 4 Fault Tolerance: Yes. 32 Spanning (JBOD): JBOD stands for "Just a Bunch of Disks". Each drive is accessed as if it were on a standard SCSI host bus adapter. This is useful when a single drive configuration is needed, but it offers no speed improvement or fault tolerance. Features and Benefits 4 Uses: JBOD works best if you have odd sized drives and you want to combine them to make one big drive. 4 Benefits: JBOD provides the ability to combine odd size drives using all of the capacity of the drives. 4 Drawbacks: Decreases performance because of the difficulty in using drives concurrently. 4 Fault Tolerance: Yes. °∞ For more detailed setup information, please refer to the Driver CD, or go to http://www.nvidia.com/page/pg_20011106217193.html to download NVIDIA nForce Tutorial Flash. 33

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RAID 1:
Every read and write is actually carried out in parallel across 2 disk drives in a RAID 1 array
system. The mirrored (backup) copy of the data can reside on the same disk or on a second
redundant drive in the array. RAID 1 provides a hot-standby copy of data if the active volume or
drive is corrupted or becomes unavailable because of a hardware failure.
RAID techniques can be applied for high-availability solutions, or as a form of automatic backup
that eliminates tedious manual backups to more expensive and less reliable media.
Features and Benefits
Drives:
Minimum 2, and maximum is 2.
Uses:
RAID 1 is ideal for small databases or any other application that requires
fault tolerance and minimal capacity.
Benefits:
Provides 100% data redundancy. Should one drive fail, the controller
switches to the other drive.
Drawbacks:
Requires 2 drives for the storage space of one drive. Performance
is impaired during drive rebuilds.
Fault Tolerance:
Yes.
32
33
4
4
4
4
4
Spanning (JBOD):
JBOD stands for “Just a Bunch of Disks”. Each drive is accessed as if it were on a standard
SCSI host bus adapter. This is useful when a single drive configuration is needed, but it offers
no speed improvement or fault tolerance.
Features and Benefits
Uses:
JBOD works best if you have odd sized drives and you want to combine
them to make one big drive.
Benefits:
JBOD provides the ability to combine odd size drives using all of the
capacity of the drives.
Drawbacks:
Decreases performance because of the difficulty in using drives
concurrently.
Fault Tolerance:
Yes.
°∞ For more detailed setup information, please refer to the Driver CD, or go to
http://www.nvidia.com/page/pg_20011106217193.html to download NVIDIA nForce Tutorial
Flash.
4
4
4
4