10-6 Internal Cabling Diagrams
Connection of Disk Array Controller N8103-101 (SATA2)
If serial ATA (SATA) hard disk drives are installed, the disk array controller (SATA2) can be
connected to the server. The disk array controller (SATA2) is an optional PCI RAID board provided
to improve the data reliability. It supports RAID0, RAID1, and RAID5.
RAID0 (striping)
Stores data on two hard disk drives by dividing it (striping). Both hard disk drives can be
accessed at the same time. This improves disk access performance compared with using a
single hard disk.
IMPORTANT:
RAID0 does not have data redundancy. When a hard disk drive
failure occurs, data cannot be restored.
Logical capacity of the array becomes a multiple of the connected
hard disk drive.
RAID1 (mirroring)
Stores the data being saved to one hard disk dive to another hard disk drive. This method
is called "mirroring." When storing data onto one hard disk drive, the same data is
simultaneously stored onto another hard disk drive. When a hard disk drive becomes
faulty, the one with the same data can be used. This provides operation without the system
going down.
IMPORTANT:
RAID1 reads or writes data to/from the two hard disk drives at the
same time. The disk access performance is lower than the single
disk.
Logical capacity of the array is equal to one hard disk drive
connected.
RAID5 (st parity)
Stores data onto three or more hard disk drives by dividing it (striping) in the same way as
RAID0. With RAID5, parity (redundant data) is also divided and stored on four hard disk
drives.
Even if one of the configured hard disk drives becomes faulty, data can be used without
any problem.
IMPORTANT:
Because data is read from or written to three or more hard disk
drives concurrently, the disk access performance is lower than that
of the configuration using only a single disk.
Because the parity data is saved, the logical capacity is a little lower
than the total capacity of the installed hard disk drives.
Summary of Contents for Express 5800/120Eh N8100 SERIES
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Page 32: ...2 4 General Description SATA Model 1 Additional slot 1 2 3 4 5 6 10 9 7 8 Additional slot 2 11...
Page 36: ...2 8 General Description Internal View SAS Model 1 2 4 5 1 6 7 8 3 2 3 1 5 2 10 9...
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