SPARC T3/T4 : MegaCLI : How to Convert the RAID Level of a Virtual Drive (LUN) On-line

Asset ID:	1-79-1569517.1
Update Date:	2017-09-29
Keywords:

Solution Type Predictive Self-Healing Sure

Solution 1569517.1 : SPARC T3/T4 : MegaCLI : How to Convert the RAID Level of a Virtual Drive (LUN) On-line

Applies to:

SPARC T3-2 - Version All Versions to All Versions [Release All Releases]
SPARC T4-2 - Version All Versions to All Versions [Release All Releases]
SPARC T4-1 - Version All Versions to All Versions [Release All Releases]
SPARC T3-1 - Version All Versions to All Versions [Release All Releases]
Netra SPARC T4-1 Server - Version All Versions to All Versions [Release All Releases]
Information in this document applies to any platform.

Purpose

MegaCLI On-Line Virtual Disk (VD) conversion without re-installing the Operating System

Scope

This feature is only available for SPARC T3/T4 systems with the optional HBA SAS6-R-INT-Z "Sun Storage 6B SAS PCIe RAID HBA INT".

This HBA is not supported on the following SPARC T3/T4 platforms

SPARC T3-1 with 16 Disk back plane

SPARC T3-4

SPARC T4-4

Details

When carrying out Virtual Drive (VD) RAID conversion, it is important to take note that RAID Volumes have physical disk requirements.

RAID 0 - Minimum of 1 Disk ( or more )

RAID 1 - Mirror should only have 2 physical disk

RAID 5 - Minimum of 3 physical disk ( or more )

RAID 6 - Minimum of 4 physical disk ( or more )

To start RAID Virtual Drive On-line conversion the following "MegaCli" syntax can be used.

Option 1

If the desired target RAID type needs additional disk drive, the following syntax should be used.

MegaCli -LDRecon -Start -r<target-raid-type> -Add -PhysDrv[enclosure id:Slot#] -L<vdisk#> -a<Controller#>

Note: This syntax may be applied in the following situation

- Converting a 3 disk RAID5 to a 4 disk RAID6

- Converting from a one disk RAID0 to a 2 disk RAID1

- Increasing the number of drive without changing the RAID level

Option 2

If the desired target RAID type needs less disk drive, the following syntax should be used.

MegaCli -LDRecon -Start -r<target-raid-type> -Rmv -PhysDrv[enclosure id:Slot#] -L<Vdisk#> -a<Controller#>

Note: This syntax may be applied in the following situation

- Converting a 2 disk RAID1 to a 1 disk RAID0

Option 3

If the desired target RAID type does not need additional disk drive, the following syntax applies

MegaCli -LDRecon -Start -r<target-raid-type> -L<vdisk#> -a<controller#>

Note: This syntax may be applied in the following situation

- Converting a 4 disk RAID6 to a 4 disk RAID5

Monitoring virtual disk reconstruction progress

To monitor the conversion Virtual Drive the following CLI command may be used

MegaCli -LDRecon -ShowProg -L<vdisk#> -a<controller#>

Note: This CLI will display the progress of the reconstruction in percent.

MegaCli -LDRecon -ProgDsply -L<vdisk#> -a<controller#>

Note: This CLI whill show a running status of the reconstruction until it reaches 100%

For Example

In the example below we will be converting a 3 disk RAID 5 Virtual Drive into a RAID 6 Virtual Drive, on a netra T4-1 with 300GB SAS drive ( no activity ) the conversion took 10 hours to complete.

STEP 1.) Check the state of the current Virtual Drive

root@netra-t4-1-sin06-a:/opt/MegaRAID/CLI# ./MegaCli -LDInfo -Lall -aALL

Adapter 0 -- Virtual Drive Information:

Virtual Drive: 0 (Target Id: 0)

Name :

RAID Level : Primary-5, Secondary-0, RAID Level Qualifier-3

Size : 1.088 TB

Parity Size : 557.861 GB

State : Optimal

Strip Size : 64 KB

Number Of Drives : 3

Span Depth : 1

Default Cache Policy: WriteBack, ReadAheadNone, Cached, No Write Cache if Bad BBU

Current Cache Policy: WriteBack, ReadAheadNone, Cached, No Write Cache if Bad BBU

Access Policy : Read/Write

Disk Cache Policy : Disk's Default

Encryption Type : None

Default Power Savings Policy: Controller Defined

Current Power Savings Policy: None

Can spin up in 1 minute: Yes

LD has drives that support T10 power conditions: Yes

LD's IO profile supports MAX power savings with cached writes: Yes

Exit Code: 0x00

STEP 2.) Begin the reconstruction of the Virtual Drive

root@netra-t4-1-sin06-a:/opt/MegaRAID/CLI# ./MegaCli -LDRecon -Start -r6 -Add -PhysDrv[252:3] -L0 -a0

Start Reconstruction of Virtual Drive Success.

Exit Code: 0x00

root@netra-t4-1-sin06-a:/opt/MegaRAID/CLI#

Step 3.) Check the progress of RAID rebuild

root@netra-t4-1-sin06-a:/opt/MegaRAID/CLI# ./MegaCli -LDRecon -ShowProg -L0 -a0

Reconstruction on VD #0 (target id #0) Completed 0% in 2 Minutes.

Exit Code: 0x00

root@netra-t4-1-sin06-a:/opt/MegaRAID/CLI#

Step 4.) Check the rebuild status using "-LDInfo" option

root@netra-t4-1-sin06-a:/opt/MegaRAID/CLI# ./MegaCli -LDInfo -Lall -aALL

Adapter 0 -- Virtual Drive Information:

Virtual Drive: 0 (Target Id: 0)

Name :

RAID Level : Primary-5, Secondary-0, RAID Level Qualifier-3

Size : 1.088 TB

State : Optimal

Strip Size : 64 KB

Number Of Drives : 3

Span Depth : 1

Default Cache Policy: WriteBack, ReadAheadNone, Cached, No Write Cache if Bad BBU

Current Cache Policy: WriteThrough, ReadAheadNone, Cached, No Write Cache if Bad BBU

Access Policy : Read/Write

Disk Cache Policy : Disk's Default

Ongoing Progresses:

Reconstruction : Completed 0%, Taken 3 min.

Encryption Type : None

Default Power Savings Policy: Controller Defined

Current Power Savings Policy: None Can spin up in 1 minute: Yes

LD has drives that support T10 power conditions: Yes

LD's IO profile supports MAX power savings with cached writes: Yes

Exit Code: 0x00

root@netra-t4-1-sin06-a:/opt/MegaRAID/CLI#

Step 5.) Check the rebuild status with a progress bar

root@netra-t4-1-sin06-a:/opt/MegaRAID/CLI# ./MegaCli -LDRecon -ProgDsply -L0 -a0

Progress of Virtual Drives...

Virtual Drive # Percent Complete Time Elps

0 ***********************01 %*********************** 00:06:18

Press <ESC> key to quit...

root@netra-t4-1-sin06-a:/opt/MegaRAID/CLI# ./MegaCli -LDRecon -ProgDsply -L0 -a0

Virtual Drive # Percent Complete Time Elps

0 ######################100 %####################### 00:00:00

Press <ESC> key to quit...

Step 6.) After rebuild process is completed, verify that the primary RAID type has change

root@netra-t4-1-sin06-a:/opt/MegaRAID/CLI# ./MegaCli -LDInfo -Lall -aALL

Adapter 0 -- Virtual Drive Information:

Virtual Drive: 0 (Target Id: 0)

Name :

RAID Level : Primary-6, Secondary-0, RAID Level Qualifier-3

Size : 1.088 TB

Parity Size : 1.088 TB

State : Optimal

Strip Size : 64 KB

Number Of Drives : 4

Span Depth : 1

Default Cache Policy: WriteBack, ReadAheadNone, Cached, No Write Cache if Bad BBU

Current Cache Policy: WriteThrough, ReadAheadNone, Cached, No Write Cache if Bad BBU

Access Policy : Read/Write

Disk Cache Policy : Disk's Default Encryption

Type : None

Default Power Savings Policy: Controller Defined

Current Power Savings Policy: None

Can spin up in 1 minute: Yes

LD has drives that support T10 power conditions: Yes

LD's IO profile supports MAX power savings with cached writes: Yes

Exit Code: 0x00

root@netra-t4-1-sin06-a:/opt/MegaRAID/CLI#

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