56
Chapter 4: Configuring Disks
Changing LUN Parameters
To change parameters for a logical unit, use
raid5 -d
device
chglun -l
lun
[ -c
cache-flags
] [-d
default-owner
]
[-r
rebuild-time
] [-i
idle-thresh
] [-t
idle-delay-time
] [-w
write-aside
]
Note:
Only root can use the chglun parameter.
In this syntax, variables mean the following:
-l lun
Logical unit number to be changed
-c cache-flags
Values are:
•
none: no caching
•
read: read caching
•
write: write caching
•
rw: read and write caching
The default is none.
-d default-owner Values are
•
1: change storage-control processor ownership of LUN
•
0: don’t change ownership
If your storage system has dual SPs, see “Dual Interfaces,
Load Balancing, and Device Names,” later in this chapter.
-r rebuild-time
Maximum time in hours to rebuild a replacement disk.
Default is 4 hours; legal values are any number greater than
or equal to 0.
Diskname Read Retries
Number of read retries that have occurred on this disk
Diskname Write Retries
Number of write retries that have occurred on this disk
Table 4-1
(continued)
Output of raid5 getlun
Entry
Meaning
