Gateway MAN FX510 Manual De Usuario
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31
RAID for security
RAID 1 maintains a complete copy of a file set on each physical
hard drive in the array. Maintaining simultaneous, complete
copies of files across multiple hard drives is called mirroring.
If a drive fails, the mirrored drive takes over and acts as the
primary drive.
hard drive in the array. Maintaining simultaneous, complete
copies of files across multiple hard drives is called mirroring.
If a drive fails, the mirrored drive takes over and acts as the
primary drive.
File reading performance (seek time) is increased using the
same methods that RAID 0 uses, although writing speed is the
same as if writing to a single hard drive.
same methods that RAID 0 uses, although writing speed is the
same as if writing to a single hard drive.
Drawback
RAID 1 treats the entire array as a single drive with the storage
capacity of the smallest physical drive in the array. So if you
have two drives (300 GB and 250 GB) in a RAID 1 array, your
computer only recognizes a single drive with 250 GB total
capacity.
RAID 1 treats the entire array as a single drive with the storage
capacity of the smallest physical drive in the array. So if you
have two drives (300 GB and 250 GB) in a RAID 1 array, your
computer only recognizes a single drive with 250 GB total
capacity.
RAID for both: performance and security
RAID 5 uses striping (at the block level) with on-the-fly error
correction across all drives. Because of this error correction,
small file read/write errors can be quickly and automatically
fixed without a significant drop in system performance.
RAID 5 offers good performance and data redundancy. This
array preserves your files if a drive fails.
correction across all drives. Because of this error correction,
small file read/write errors can be quickly and automatically
fixed without a significant drop in system performance.
RAID 5 offers good performance and data redundancy. This
array preserves your files if a drive fails.
A
B
C
B
C
A
B
C
B
C
RAID 1
8512066.book Page 31 Tuesday, January 16, 2007 11:02 AM