Adaptec 2074700-R User Guide - Page 64
GDTH Driver Parameters
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Installing Linux 5.5 5.5.1 GDTH Driver Parameters Reservation of SCSI Devices The reservation of SCSI devices becomes necessary if you want Direct Access Devices (for example, hard disks, removable hard disks like Iomega or SyQuest) to be directly controlled by Linux and not the ICP RAID controller's firmware (for example, they are not configured as host drives). Reservation of SCSI devices is also called raw-service. In this case the ICP RAID controller does not cache the data to/from the reserved SCSI device. This reservation is important for removable hard disks. If they are controlled by the ICP RAID controller and are a host drive, a media change is very difficult. Non Direct Access Devices like CD-ROMs, Streamers, DATs, etc. do NOT require a reservation. Important: The reservation of SCSI devices is only possible with not-initialized SCSI devices. (Use ICPCON to de-initialize an already initialized device). 1. From driver version 1.10 on you can add the parameters for the reservation with the LILO append command: Excerpt of /etc/lilo.conf: # End LILO global section # Linux bootable partition config begins image = /boot/vmlinuz root = /dev/sda2 label = Linux append = "gdth=reserve_list:1,0,6,0" # Linux bootable partition config ends This gdth driver parameter reserves the SCSI device that is connected with ICP RAID controller 1 (the second ICP RAID controller), SCSI Bus 0 (channel A), ID 6, LUN 0 for Linux (raw service). After each change in /etc/lilo.conf lilo must be loaded once. Driver parameters may also be entered at the LILO boot prompt. (for example: gdth=reserve_list:1,0,6,0). 64 Software Installation and User's Guide
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