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How to configure the DELL PERC H200 RAID controller

This documentation explains how to configure the DELL PERC H200 RAID controller on a Scaleway Dedibox.

Before you start

To complete the actions presented below, you must have:

Checking the RAID controller status

To check the status of the DELL PERC H200 RAID controller, run the following command:

sas2ircu LIST

Output:

LSI Corporation SAS2 IR Configuration Utility.
Version 5.00.00.00 (2010.02.09)
Copyright (c) 2009 LSI Corporation. All rights reserved.

Adapter      Vendor  Device                       SubSys  SubSys
Index    Type          ID      ID    Pci Address          Ven ID  Dev ID
-----  ------------  ------  ------  -----------------    ------  ------
  0     SAS2008     1000h    72h   00h:01h:00h:00h      1028h   1f1dh
SAS2IRCU: Utility Completed Successfully.

Checking the RAID status

To check the status of the hardware RAID on your Dell PERC H200, run the following command:

sas2ircu-status

Output:

-- Controller informations --
-- ID | Model
c0 | SAS2008
-- Arrays informations --
-- ID | Type | Size | Status
c0u0 | RAID1 | 1907G | Okay (OKY)
-- Disks informations
-- ID | Model | Status
c0u0p0 | ST32000444SS (9WM3NAR0) | Optimal (OPT)
c0u0p1 | ST32000444SS (9WM3MZL2) | Optimal (OPT)

Optimizing RAID performance

For maximum performance, you can activate the cache of your SATA disks. After creating a virtual disk, the cache of SATA disks is disabled by default. Restore maximum performance by re-enabling the cache using rescue mode.

Note

This step can be performed on Dedibox servers equipped with a DELL PERC H200 RAID controller and SATA hard disk drives.

  1. Boot your server into rescue mode using a 64-bit Ubuntu operating system.
  2. Log into the server using the provided SSH credentials and run the following commands to re-enable the disk cache:
sudo su
echo 'deb http://linux.dell.com/repo/community/deb/latest /' | sudo tee -a  /etc/apt/sources.list.d/linux.dell.com.sources.list
apt-get update && apt-get install -y --force-yes srvadmin-base
service dataeng start
/opt/dell/srvadmin/sbin/omconfig storage vdisk  action=changepolicy controller=0 vdisk=0 diskcachepolicy=enabled

Advanced operations

Creating a RAID volume

To create a virtual drive in controller 0, including disks 0 and 1:

# to create a RAID0
sas2ircu 0 create raid0 max 1:0 1:1
# to create a RAID1
sas2ircu 0 create raid1 max 1:0 1:1
# to create a volume with a volume name (optional)
sas2ircu 0 create $raidtype max 1:0 1:1 my-RAID0

Creating a hot spare drive

To create a hot spare drive:

# example with drive 1:1
sas2ircu 0 HOTSPARE 1:1

Deleting configuration

Important

Deleting the configuration is DANGEROUS and should be done with caution.

To delete controller 0 configuration:

sas2ircu 0 delete

Enabling an inactive volume

To enable an inactive volume:

sas2ircu 0 ACTIVATE $the-volume-id
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