Managing the Intel VROC (SATA RAID) on Linux

Function

This command is used to query all basic information about Intel VROC (SATA RAID).

Syntax

mdadm --detail-platform

Description

None

Usage Guidelines

None

Example

# Query all basic information about Intel VROC (SATA RAID).

[root@localhost ~]# mdadm --detail-platform
       Platform : Intel(R) Rapid Storage Technology enterprise
        Version : 5.4.0.1039
    RAID Levels : raid0 raid1 raid10 raid5
    Chunk Sizes : 4k 8k 16k 32k 64k 128k
    2TB volumes : supported
      2TB disks : supported
      Max Disks : 8
    Max Volumes : 2 per array, 8 per controller
 I/O Controller : /sys/devices/pci0000:00/0000:00:11.5 (SATA)
          Port0 : - no device attached -
          Port1 : - no device attached -
          Port2 : - no device attached -
          Port3 : - no device attached -
          Port4 : - no device attached -
          Port5 : - no device attached -

       Platform : Intel(R) Rapid Storage Technology enterprise
        Version : 5.4.0.1039
    RAID Levels : raid0 raid1 raid10 raid5
    Chunk Sizes : 4k 8k 16k 32k 64k 128k
    2TB volumes : supported
      2TB disks : supported
      Max Disks : 8
    Max Volumes : 2 per array, 8 per controller
 I/O Controller : /sys/devices/pci0000:00/0000:00:17.0 (SATA)
          Port0 : /dev/sda (see Note) (DV624000FL1P6EGN)
          Port3 : /dev/sdb (DV6236008Z960FGN)
          Port4 : /dev/sdc (18031A983BCA)
          Port5 : /dev/sdd (PR1461036N160DGN)
          Port7 : /dev/sdf (S2HPNYAG600330)
          Port1 : /dev/sdg (17501B83246B)
          Port2 : - no device attached -
          Port6 : - no device attached -

In the command output, the character following sd indicates the drive letter. For example, a in sda is the drive letter. A drive letter identifies a drive in the system.

Function

Create an array and RAID arrays for the array.

Syntax

mdadm -C /dev/md/array /dev/sd[a,b] -n disk -e imsm

mdadm -C /dev/md/RAID /dev/md/array -n disk -1 level -c stripe

Parameters

Usage Guidelines

• On the OS, Array indicates a drive group. An array can consist of a maximum of two RAIDs.
• On the BIOS, Volume indicates a RAID array. The BIOS does not support creation of drive groups.
• When a volume is created on the BIOS, a drive group named imsmX (X indicates a serial number generated by the system) is automatically created.
• For details about how to query the drive letter, see Querying Intel VROC (SATA RAID) Basic Information.

Example

# Create an array.

[root@localhost ~]# mdadm -C /dev/md/md0 /dev/sd[c,f] -n 2 -e imsm
mdadm: /dev/sdc appears to be part of a raid array:
       level=container devices=3 ctime=Mon Nov 14 19:33:46 2016
Continue creating array? y
mdadm: container /dev/md/md0 prepared.

# Create a RAID 0 array.

[root@localhost ~]# mdadm -C /dev/md/j0 /dev/md/luo1 -n 2 -l 0
mdadm: array /dev/md/j0 started.

Function

Delete an array and a RAID array.

Syntax

mdadm -S /dev/md/RAID

mdadm -S /dev/md/array

mdadm --zero-superblock /dev/sd [a,b]

Description

Usage Instruction

To delete an array, perform the following steps:

1. Delete a RAID array.
2. Deletes an array.
3. Clear superblock.

Example

# Delete a RAID group.

[root@localhost ~]# mdadm -S /dev/md/j0
mdadm: stopped /dev/md/j0

# Delete the array.

[root@localhost ~]# mdadm -S /dev/md/luo1
mdadm: stopped /dev/md/luo1

# Clear superblock.

[root@localhost ~]# mdadm --zero-superblock /dev/sd[a,c]

Function

Query basic information about an array and its RAID arrays.

Syntax

mdadm -D /dev/md/array

mdadm -D /dev/md/RAID

Description

Usage Instruction

None

Example

# Query information about array 1.

[root@localhost ~]# mdadm -D /dev/md/array1:
           Version : imsm
        Raid Level : container
     Total Devices : 2   Working Devices : 2
              UUID : c6cab00a:92a43755:dbaeeb81:9448e978
     Member Arrays : /dev/md/v0        
Number   Major   Minor   RaidDevice
0    8       0      -     /dev/sda
1    8       32     -     /dev/sdc

# Query information about RAID 0.

[root@localhost ~]# mdadm -D /dev/md/v0/dev/md/v0:
         Container : /dev/md/array1, member 0
        Raid Level : raid0
        Array Size : 1875378176 (1788.50 GiB 1920.39 GB)
      Raid Devices : 2
     Total Devices : 2
             State : clean
    Active Devices : 2
   Working Devices : 2
    Failed Devices : 0
     Spare Devices : 0
        Chunk Size : 128K
Consistency Policy : none
              UUID : d0f494f2:6be68b49:30ed2660:82063b8b
    Number   Major   Minor   RaidDevice State
       0  8    32       0     active sync   /dev/sdc
       1  8    0        1     active sync   /dev/sda

Function

Configure a hot spare drive for an array.

Syntax

mdadm -a /dev/md/array /dev/sd[a]

Description

Usage Instruction

None

Example

# Configure hard drive d as the hot spare drive of array 1.

[root@localhost ~]# mdadm -a /dev/md/array1 /dev/sdd
mdadm: added /dev/sdd

A drive letter identifies a drive in the system. For details about how to query the drive letter, see Querying Intel VROC (SATA RAID) Basic Information.

Function

Turn on and off the UID indicator of a specified drive.

Syntax

ledctl locate=/dev/sda

ledctl locate_off=/dev/sda

Description

Usage Instruction

None

Example

# Turn on the UID indicator of hard drive a.

[root@localhost ~]# ledctl locate=/dev/sda
[root@localhost ~]#

# Turn off the UID indicator of hard drive a.

[root@localhost ~]# ledctl locate_off=/dev/sda
[root@localhost ~]#

Scenarios

Set the rebuild policy for new drives if a RAID array with redundancy does not have hot spare drive so that the newly installed drive can automatically rebuild data of the faulty drive replaced.

Procedure

echo "POLICY domain=DOMAIN path=* metadata=imsm action=spare-same-slot">> /ect/mdadm.conf

echo "MAILADDR root" >> /etc/mdadm.conf

mdadm --udev-rules > /etc/udev/rules.d/65-md-bare.rules

Scenarios

On Linux, if a hard drive that is not added to a RAID array is removed, the Fault indicator is on by default. You can modify the indicator lightening policy in the ledmon.conf configuration file.

Procedure

1. Run the vi /etc/ledmon.conf command and press i to edit the configuration file.

2. Run the RAID_MEMBERS_ONLY=true command to modify the configuration file.

3. Press Esc to exit the editing mode.
4. Enter :wq!. Save the settings and exit.