Intel SRCMR, User Manual

Page: 105 / 180

Storage Console 105
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NOTE
If you create new host drives with the Express Setup function, the StorCon and the Intel RAID
Controller SRCMR will automatically adjust all parameters to their respective best values. The
transfer rate per drive depends on circumstances like cables, terminators, etc. For example, if a
certain configuration does not allow 160 MB/sec, the drive is automatically “throttled” down to the
next trouble-free transfer rate. See Figure 44.
Figure 44. Initialize Disk
SCSI Parameter / Initialize
When a SCSI hard disk drive is initialized the first time by the RAID controller, its SCSI
parameters may or may not be set automatically set to their optimal settings. The following section
describes manual configuration of these settings.
For certain RAID controllers and/or
situations, certain parameters described in this section may not be configurable.
CAUTION
This option can destroy all data on the hard disk.
StorCon copies Intel RAID Controller SRCMR specific configuration blocks on the hard disk, a
primary block and a mirrored secondary block. The possible settings are different if you select a
SCSI hard disk or a Fibre Channel hard disk. With a FCAL hard disk there are only a few settings
which are relevant. You should always check that they are all “Enabled” or “On”. If the hard disk
you have selected is an Ultra160 device and the Intel RAID Controller SRCMR has Ultra160 SCSI
channels, <F4> “Advanced Configuration”, allows you to configure the so-called “Domain
Validation” (a cyclical check of the correct data transfer at a given rate). Normally this parameter
is Off.
The SCSI bus can operate two methods of data transfer: asynchronous and synchronous. Each
SCSI device must be able to perform the first type of transfer, the second type is optional. The
advantage of the synchronous transfer is a higher data transfer rate, since the signal transfer times
on the possibly long SCSI cable have no influence on the transfer rate. This mode is only effective
if both devices support synchronous transfer and can communicate with each other in this mode.