How to determine how a RAID 1 Virtual Disk is built in a Storage[TM] 2500 and 6000 Array

Asset ID:	1-71-1020837.1
Update Date:	2011-02-21
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Solution Type Technical Instruction Sure

Solution 1020837.1 : How to determine how a RAID 1 Virtual Disk is built in a Storage[TM] 2500 and 6000 Array

Related Items


Sun Storage 6580 Array
 Sun Storage 6540 Array
 Sun Storage Flexline 240 Array
 Sun Storage Flexline 380 Array
 Sun Storage 2540 Array
 Sun Storage 6180 Array
 Sun Storage 2510 Array
 Sun Storage Flexline 280 Array
 Sun Storage 2530 Array
 Sun Storage 6140 Array
 Sun Storage 6780 Array
 Sun Storage Flexline 210 Array

Related Categories


GCS>Sun Microsystems>Storage - Disk>Modular Disk - 6xxx Arrays
 GCS>Sun Microsystems>Storage - Disk>Modular Disk - Flexline FLX FLA FLC Arrays
 GCS>Sun Microsystems>Storage - Disk>Modular Disk - 2xxx Arrays
 GCS>Sun Microsystems>Storage - Disk>Modular Disk - Other

PreviouslyPublishedAs
265729

Applies to:

Sun Storage 2530 Array - Version: Not Applicable to Not Applicable - Release: N/A to N/A
Sun Storage 2540 Array - Version: Not Applicable to Not Applicable [Release: N/A to N/A]
Sun Storage 6140 Array
Sun Storage 6580 Array - Version: Not Applicable to Not Applicable [Release: N/A to N/A]
Sun Storage 6540 Array
All Platforms

Goal

The intent of this document is to explain how RAID 1 are built in the array and how to determine the mirror pairs.

In a RAID 1+0 Virtual Disk (vdisk) the disks are mirrored using the following algorithm:

Data drive = X
Mirrored drive = N/2+X

where:
- N is the total number of physical disks.
- X goes from 1 to N/2

For example, if you have six physical disks (1, 2, 3, 4, 5, 6) the mirror pairs are:

Mirrored disks:

For disk 1: 6/2+1= disk 4
For disk 2: 6/2+2= disk 5
For disk 3: 6/2+3= disk 6

The first disk of the first half is mirrored to the first disk of the second half, the second disk of the first half is mirrored to the second disk of the second half, etc, up to the last disk of the first half is mirrored to the last disk of the second half.

Solution

1) Collect a supportdata.

Reference <Document 1002514.1> Collecting Support Data for Arrays Using Sun StorageTek[TM] Common Array Manager.
Reference <Document 1014074.1> Collecting Support Data for Arrays Using Sun StorageTek[TM] SANtricity Storage Manager.

2) Extract the vdisk details.

Extract the storageArrayProfile.txt file from the supportdata.
Look at the section Virtual Disks (Volume Groups) in this file and search for your vdisk:

Example:

  VolumeGroup 3
     Raid Level: RAID 1
     Online: true
     Tray loss protection: false

     Associated volumes and capacities:
        RAID1VOL (1 GB)

     Associated drives (in piece order):
        Tray.85.Drive.7 index: 0
        Tray.85.Drive.10 index: 1
        Tray.85.Drive.15 index: 2
        Tray.85.Drive.11 index: 3

Based on the above output, the mirror pairs are:

Tray.85.Drive.7 is mirrored with Tray.85.Drive.15.
Tray.85.Drive.10 is mirrored with Tray.85.Drive.11.

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