Software Installation and User’s Guide
125
ICP RAID Console
Caution:
Disk initialization can destroy all data on the hard disk.
ICPCON copies ICP RAID controller specific configuration blocks on the hard disk, a
primary block and a mirrored secondary block. You should always check that they are all
“Enabled” or “On”. If the hard disk you have selected is an Ultra160 device and the ICP
RAID controller 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.
Sync. Transfer
This parameter disables or enables synchronous data transfer.
Sync. Transfer Rate
This is the synchronous data transfer rate in MB/s. Ultra160 SCSI allows up to 160 MB/s.
If a SCSI cable does not permit a certain transfer rate, the transfer rate can be reduced to a
value that permits trouble-free data transfer. Lowering the transfer rate may also become
necessary when using a configuration which does not allow full speed. See
Figure 10-71
.
Disconnect
You can connect several components to a SCSI bus. It is particularly important to
guarantee a high degree of overlapping action on the SCSI bus. This high degree of
overlapping becomes possible when a SCSI device has
Disconnect
enabled.
Disk Read Cache / Disk Write Cache / Tagged Queues
For performance reasons, the read ahead and write cache of the hard disk should be
always On.
Tagged Queues
is a SCSI feature which allows the drive to execute more than
one command at a time. If available, it should also be On.
If you leave this configuration form by pressing <Esc> and you have made changes,
ICPCON displays a security request. The warning of the destruction of all data
(
Figure 10-72
)
may require different evaluations, depending on the device's current state
and the options you selected.
Figure 10-72. Disk Initialization Confirmation
Note:
If this operation is the first initialization of the device, for example, the drive was
previously connected to a different controller, all data will be lost. If the device has
already been initialized, and only internal parameters such as Disconnect, Synchronous
Summary of Contents for 2074700-R - ICP Vortex GDT8514RZ RAID Controller
Page 1: ...Preliminary ICP RAID Software Software Installation and User s Guide Version 1 2 7 June 2003 ...
Page 23: ...Software Installation and User s Guide 23 Introduction ...
Page 68: ...68 Software Installation and User s Guide Installing Linux ...
Page 92: ...92 Software Installation and User s Guide Installing Berkeley UNIX FreeBSD ...
Page 214: ...214 Software Installation and User s Guide Fibre Channel Features ...
