Sun Storage 3000 Arrays: How the Logical Drive LD-ID Is Assigned

Asset ID:	1-79-1009457.1
Update Date:	2014-04-25
Keywords:

Solution Type Predictive Self-Healing Sure

Solution 1009457.1 : Sun Storage 3000 Arrays: How the Logical Drive LD-ID Is Assigned

Applies to:

Sun Storage 3310 Array - Version Not Applicable and later
Sun Storage 3320 SCSI Array - Version Not Applicable and later
Sun Storage 3510 FC Array - Version Not Applicable and later
Sun Storage 3511 SATA Array - Version Not Applicable and later
All Platforms

Purpose

This document describes how the ID for a logical drive (LD-ID) is assigned when creating new logical drives on the following arrays:

Sun Storage 3310 Array
Sun Storage 3320 Array
Sun Storage 3510 Array
Sun Storage 3511 Array

Important information is also provided concerning the uniqueness of the LD-ID.

Details

When a logical drive is created, an LD-ID value is assigned to it. This can be seen either from the firmware menu or the sccli> show logical-drives command. An example is below:

sccli> show logical-drives
LD    LD-ID        Size Assigned Type   Disks Spare Failed Status
------------------------------------------------------------------------
ld0   3A14CAA4   7.81GB Primary   RAID5 3     0      0      Good
Write-Policy Default          StripeSize 128KB
ld1   2091F262 272.96GB Primary   RAID5 3     0      0      Good
Write-Policy Default          StripeSize 128KB

In the above output, the LD-ID assigned to ld0 is 3A14CAA4 and the LD-ID assigned to ld1 is 2091F262.

Dothill, the array manufacturer, has provided the following information.

The LD-ID is a random number. The user has no control over what number is assigned to a new LD.

After deletion and recreation of a LD, the LD-ID will not be the same.

It is possible for two different systems to assign the same LD-ID, and it is possible for the same number to be recycled on the same system. They are not intended to be globally unique.

This LD-ID value is incorporated into the WWN for the LD partitions. A combination of the chassis serial number and enterprise ID guarantees that the WWN of LUNs presented to the operating system will be unique.

Previously Published As 82008

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