Specifications

5. Edit the ddr.dbase file to include the lines shown in Figure 14 as an entry in the
disks subsection.
6. Type ddr_config -c to compile the ddr.dbase file.
7. Type ddr_config -s disk "IBM" "2105F20" to confirm the values in the
ddr.dbase file.
Setting the kernel SCSI parameters
Perform the following steps to set the kernel SCSI parameters
Note: You must rebuild the kernel after you perform these steps.
1. Quiesce the storage.
2. Place the system in single-user mode.
3. Log in as root.
4. Change the directory to /sys/data.
5. Edit the /camdata.c file by changing the non-read/write command timeout value
in the changeable disk driver timeout section. Change it from 10 seconds to 60
seconds. See Figure 15 for an example of how to edit the camdata.c file.
6. Type doconfig -c HOSTNAME to rebuild the kernel, where HOSTNAME is the
hostname of the system you are modifying.
7. Restart the host system.
Configuring the storage
To partition and prepare ESS LUNs and create and mount file systems, use the
standard Tru64 storage configuration utilities.
SCSIDEVICE
#
# Values for the IBM ESS 2105
#
Type = disk
Name = "IBM" "2105F20"
#
PARAMETERS:
TypeSubClass = hard_disk, raid
BadBlockRecovery = disabled
DynamicGeometry = true
LongTimeoutRetry = enabled
PwrMgmt_Capable = false
TagQueueDepth = 20
ReadyTimeSeconds = 180
CMD_WriteVerify = supported
InquiryLength = 255
RequestSenseLength = 255
Figure 14. Example of the ddr.dbase file
u_long cdisk_to_def = 10; /* 10 seconds */
u_long cdisk_to_def = 60; /* 60 seconds */
Figure 15. Example of how to change the timeout section of the camdata.c file from 10 to 60
seconds
26 ESS Host Systems Attachment Guide
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