Dell 36XX, 34XX, 38XX, 32XX manual Troubleshooting, DiskGroup

Parameters

Parameter	Description
diskGroup	Sequence number of the disk group for which to
	set properties. You must put brackets ([ ]) around
	the disk group number.
addPhysicalDisks	Identifies the physical disk by enclosure and slot
	location to include in the disk group. Enclosure ID
	values are 0 to 99. Slot ID values are 0 to 31.
	You must put parentheses around the enclosure ID
	values and the slot ID values.
raidLevel	The RAID level for the disk group. Valid values are
	0, 1, 5, or 6.
owner	The RAID controller module that owns the disk
	group. Valid RAID controller module identifier
	values are 0 and 1. The identifier value is 0 for the
	RAID controller module on the top and 1 for the
	RAID controller module on the bottom when
	viewed from the rear of the enclosure. Use this
	parameter only if you want to change the disk
	group owner.

NOTE: When using this command, you can specify one or more of the parameters. You do not, however, need to use all of the parameters. Using too many parameters can cause host I/O errors or result in internal RAID controller module reboots because the time period ends before the disk group definition is set.

NOTE: For configurations with more than 32 virtual disks, it is recommended you quiesce host I/O operations when executing this command.

Troubleshooting

Attempting to expand large disk groups by adding physical disks, also called Dynamic Capacity Expansion (DCE), may fail with the one of the following messages:

•Return code: Error 26—The modification operation cannot complete because of the number of physical disks in the disk group and the segment size of the associated virtual disks. Reduce the segment size of all virtual disks in the disk group to 128 KB or below using the Change Segment Size option. Then, retry the operation.

•Return code: Error 462—A SYMbol procedure could not be carried out because the firmware could not allocate sufficient cache memory. Operation when error occurred: PROC_startVolum.

In addition, a Major Event Log (MEL) event indicating insufficient cache available to complete the DCE operation may occur.

DCE requires enough memory to buffer the data read from the original virtual disk and the data to be written to the expanded virtual disk. Some combination of number of physical disks in the expansion

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