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Supplementary Notes <HDD(1)>
HDD Connection/RAID Configuration -- Precautions
Case A/F
Non RAID
Case B/G
On-board RAID (RAID 0/1/10)
Case C/H
N8103-116A RAID controller
Case D/I
N8103-109 RAID controller
Case E/J
N8103-117A RAID controller
RAID configuration
For RAID configuration, provide HDDs of same capacity and rotation speed within same group (pack). Also, use
the same rotation speed HDDs in the system. (Refer to the next page for SAS/SATA mix configuration)
Case A/F (Non RAID configuration), Case B/G (On-board RAID)
On-board RAID function (LSI Embedded MegaRAID)
RAID calculations utilize the CPU on the motherboard.
Case C/H (N8103-116A RAID controller [LSI MegaRAID])
Insert RAID controller to PCI slot for RAID configuration. RAID calculations utilize the CPU on the RAID
controller.
For N8103-119 RAID option of adding the upgrade kit for RAID configuration, please refer to below Case D.
Case D/I(N8103-109 RAID controller [Promise RAID])
Case E/J(N8103-117A RAID controller [LSI MegaRAID])
Insert RAID controller to PCI slot for RAID configuration. RAID calculations utilize the CPU on the RAID
controller.
When using RAID controller in Case C/D/E/H/I/J - Precautions
The controller is set to "write-through" by default. For higher performance, it is recommended to install an
additional battery and operate in "write-back" mode.For details on how to change settings, refer to the Users
Guide attached to the main unit.
Write Through mode
A synchronous write to the hard disk occurs when there is a write to a cache memory.
Write Back mode
When there is a write to a cache memory, the completion notification is issued to the software immediately,
while the array controller performs an asynchronous write to the hard disk. In general, the access speed is
faster than write-through mode. An UPS or batteries to backup the data is required.
(RAID 0/1/10)
(128MB cache)
(RAID 0/1/5/6/10/50)
(128MB cache)
(RAID 0/1/5/6/10/50)
(128MB cache)
Express5800/GT110b
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