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31_Hardware_RAID_Setup
There are two broad steps when provisioning storage with ESOS: The first is configuring your back-end storage device which is typically a high-end RAID controller, or virtual disk files on file systems, or can be anything else that appears as a SCSI block device in Linux. Enterprise Storage OS includes a number of different Linux block device subsystems such as DRBD, Linux software RAID (md), and LVM2 so the possibilities are quite endless.
The second step is configuring your front side target devices, the targets that are made available via your SAN. This will be covered in the subsequent ESOS wiki pages (hosts/initiators, devices, and targets).
ESOS has limited support for provisioning/configuring logical drives via the TUI. Currently only LSI Logic MegaRAID adapters are supported using the TUI logical drive / adapter functions. Using these functions requires the MegaCLI tool which is an option during the USB flash drive installation. Advanced adapter properties, multi-span logical drives, etc. are not supported using the TUI.
A few basic RAID controller/adapter properties are configurable via the TUI: Back-End Storage -> Adapter Properties
Using the adapter information dialog (Back-End Storage -> Adapter Information) will allow you to select a RAID controller and will display an overview of the attached storage (enclosures + devices).
To add a new logical drive (Back-End Storage -> Add Volume) you will first select the desired RAID adapter; next you will be presented with screen that contains the available disks. Select the disks and hit ENTER (or ESCAPE to cancel). On the final dialog, you will choose the RAID level, strip size, cache options, etc. and then hit 'OK' to proceed with provisioning the volume or 'Cancel' to do nothing and close the dialog.
Deleting volumes / logical drives (Back-End Storage -> Delete Volume) and modifying volume properties (Back-End Storage -> Volume Properties) is also possible via the TUI.
After you have configured your RAID logical drive(s), you can now proceed to the advanced back-end storage document, or below for creating a file system on the new device and adding virtual disks, or move on to adding your SCST device(s).
The LSI Logic "MegaCLI" utility is an install option with ESOS (during the installation script). The utility allows you to create/delete/modify volumes (logical drives) on your MegaRAID controller. Below are a few examples of using the MegaCLI tool (MegaCli64 for us). A nice handy cheat sheet is located here. Or for a very in-depth document, consult the user guide available on LSI Logic's web site.
Get adapter information for the first MegaRAID adapter (0):
MegaCli64 -AdpAllInfo -a0
A list of all the adapter's physical drives:
MegaCli64 -PDList -a0
All of the logical drives for the adapter:
MegaCli64 -LDInfo -Lall -a0
Delete logical drive 0:
MegaCli64 -CfgLdDel -L0 -a0
Create a new RAID5 logical drive, with three physical disks, adaptive read-ahead (ADRA) and write cache enabled (WB):
MegaCli64 -CfgLDAdd -R5[8:0,8:1,8:2] WB ADRA -a0
Create a new RAID0 logical drive, with two physical disks, no read-ahead (NORA) and write cache disabled (WT):
MegaCli64 -CfgLDAdd -R0[8:0,8:1] WT NORA -a0
After you have created your new volume(s) you will need to find and record the SCSI device node (eg, /dev/sdz). You can easily find this using lsscsi or checking dmesg.
The arcconf utility is also an install option with ESOS for configuring Adaptec RAID controllers from inside the OS. This tool should work with most/all Adaptec SATA/SAS RAID controllers.
See all controller/drive/volume information for controller # 1:
arcconf GETCONFIG 1
Delete logical device (volume) 1 on controller 1:
arcconf DELETE 1 LOGICALDRIVE 1
Make a new RAID5 volume on controller 1 using three disks (channel 0, device numbers 2, 3, 4) with read cache enabled and write cache enabled:
arcconf CREATE 1 LOGICALDRIVE Rcache RON Wcache WB MAX 5 0 2 0 3 0 4
Make a new RAID0 volume on controller 1 using two disks (channel 0, device numbers 2, 3) with read cache disabled and write cache disabled:
arcconf CREATE 1 LOGICALDRIVE Rcache ROFF Wcache WT MAX 0 0 2 0 3
Once you've created a new volume on your Adaptec RAID controller, grab the SCSI device node (lsscsi works well) and continue with one of the target configuration sections below.
Other RAID controllers are supported, however, not all of them necessarily have a CLI tool for configuring volumes, adapter settings, etc. from inside of ESOS. See the 03_Supported_Hardware wiki page for a current list of supported controllers and possible corresponding CLI utilities.
You can still use these other controllers with ESOS, you will just need to configure your volumes / logical drives "outside" of ESOS -- via the BIOS. Or seek the documentation for using the CLI tools on your own.
If you find that your favorite "enterprise class" RAID controller is not supported by ESOS, please let us know on the esos-users Google Group. It would also be helpful to know if there are any CLI management tools that can be used to configure these controllers from inside the OS.
Now that you have setup and configured your basic back-end storage, you can continue on to the 41_Hosts_and_Initiators wiki document to setup your security groups and initiators. Or if you have advanced back-end storage needs, use the 32_Advanced_Back_End_Storage_Setup page for additional information.