Understand the Autoraid configuration

[Serge Uranie_1]

How can I assess how my Autoraid is configured ? raid5 or raid 1
How to determine the unused disc space?
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Following is a snapshot of my environment
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Volume Groups 0 of 3 selected
------------------------------------------------------------------------------
Mbytes Physical Logical
Name Available Volumes Volumes
/---------------------------------------------------------------------------\
| vg00 2984 of 17352 2 9 ^
| vg02 8 of 29992 1 3
| vg01 0 of 94240 6 9

------------------------------------------------------------------------------
Disk Devices 0 of 11 selected
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Hardware Number Volume Total
Path of Paths Use Group Mbytes Description
/---------------------------------------------------------------------------\
| 0/0/1/0.1.0 1 Unused -- 0 HP DVD-ROM SCSI Dri
| 0/0/2/0.6.0 1 LVM vg00 8683 SEAGATE ST39102LC ^
| 0/0/2/1.6.0 1 LVM vg00 8683 SEAGATE ST39102LC |
| 0/4/0/0.1 2 -- -- -- HP AutoRAID Disk Ar |
| 0/4/0/0.1.0 2 LVM vg01 16384 HP AutoRAID LUN |
| 0/4/0/0.1.1 2 LVM vg01 16384 HP AutoRAID LUN
| 0/4/0/0.1.2 2 LVM vg01 16270 HP AutoRAID LUN
| 0/4/0/0.1.3 2 LVM vg01 15230 HP AutoRAID LUN
| 0/4/0/0.1.4 2 LVM vg01 15000 HP AutoRAID LUN
| 0/4/0/0.1.5 2 LVM vg01 15000 HP AutoRAID LUN
| 0/4/0/0.1.6 2 LVM vg02 30000 HP AutoRAID LUN

Logical Volume Volume Group Use Mbytes Copies Directory
/-------------- --------------- ------------- --------- -------- ------------
| lvol1 vg00 HFS 300 1 /stand
| lvol2 vg00 Swap/Dump 3000 0
| lvol3 vg00 VxFS 200 1 /
| lvol4 vg00 VxFS 1400 1 /opt
| lvol5 vg00 VxFS 64 1 /tmp
| lvol6 vg00 VxFS 1000 1 /usr
| lvol7 vg00 VxFS 1200 1 /var
| lvol8 vg00 VxFS 20 1 /home
| lvol9 vg00 Swap 3000 0
| lvol10 vg01 VxFS 2000 0 /d09
| lvol1 vg01 VxFS 8100 0 /d01
| lvol2 vg01 VxFS 8100 0 /d02
| lvol3 vg01 HFS 6188 0 /d03
| lvol4 vg01 VxFS 12000 0 /d04
| lvol5 vg01 VxFS 11424 0 /d05
| lvol6 vg01 VxFS 12000 0 /d06
| lvol7 vg01 HFS 18428 0 /d07
| lvol8 vg01 VxFS 16000 0 /d08
| lvol1 vg02 VxFS 10000 0 /d21
| lvol2 vg02 VxFS 10000 0 /d22
| lvol3 vg02 VxFS 9984 0 /d23
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# ioscan -C disk
H/W Path Class Description
================================================
0/0/1/0.1.0 disk HP DVD-ROM 6x/32x
0/0/2/0.6.0 disk SEAGATE ST39102LC
0/0/2/1.6.0 disk SEAGATE ST39102LC
0/4/0/0.1.0 disk HP C5447A
0/4/0/0.1.1 disk HP C5447A
0/4/0/0.1.2 disk HP C5447A
0/4/0/0.1.3 disk HP C5447A
0/4/0/0.1.4 disk HP C5447A
0/4/0/0.1.5 disk HP C5447A
0/4/0/0.1.6 disk HP C5447A
0/5/0/0.0.0 disk HP C5447A
0/5/0/0.0.1 disk HP C5447A
0/5/0/0.0.2 disk HP C5447A
0/5/0/0.0.3 disk HP C5447A
0/5/0/0.0.4 disk HP C5447A
0/5/0/0.0.5 disk HP C5447A
0/5/0/0.0.6 disk HP C5447A
#

[A. Clay Stephenson]

The AutoRAID doesn't know or care about filesystems. Free filesystem space or unallocated VG space is meaningless to the array. The only thing that matters to an AutoRAID is how disk space is allocated as LUN's and how much space is left free.

To get meaningful data, execute arraydsp -i to get the arrayid then execute arraydsp -a arrayid.

The AutoRAID always keeps at least 10% of the total space as RAID 1/0 and tries to maintain as much as possible in RAID 1/0. If you never allocate more than 50% of your array's capacity as LUN's then the array will be fully RAID 1/0. It's not possible to say that LUN0 occupies Disks1 1B, 2A, and 3B, for example, because the layout is dynamic.

[Patrick Wallek]

You are going to have to use tools that look at the AutoRaid itself to determine how the data is laid out. If I recall correctly you can see the configuration of the AutoRaid with the 'arraydsp' command.

With the AutoRaid units though, you can not directly control whether the data is in RAID 5 or RAID10. The AutoRaid itself controls that. It determines that automatically. Now depending on how much of the AutoRaid disks are used for Luns and how much data you have you could have all data in RAID 10, all data in RAID 5 or some combination thereof.