MSA1000 - expanding the array to create more LUNs

[EU-Admins-UNIX]

I have the manual and have tried extending and expanding, but nothing works.

Regards

Tariq

[Torsten.]

Could you do a "show unit" for the existing LUNs? (try "show units")

[EU-Admins-UNIX]

Attached

[Torsten.]

And a show disks, please.

(txt file is ok, please not a word file)

[Torsten.]

>> msa> add unit 21 data="DISK101-DISK114 DISK201-DISK214 DISK301-DISK312" spare="DISK313-DISK314" raid_level=1 stripe_size=128 size=100gb

You can do this on the disks 301 to 312 only, the other disks are likely full.

[EU-Admins-UNIX]

attached

[Torsten.]

LUNs 1 to 22 are on all disks (101 - 312), so the smaller disks are now full.

You could only try to create another LUN on the remaining bigger drives 301 to 312.

[EU-Admins-UNIX]

server-msa> add unit 23 data="disk301-disk312" spare="disk313-disk314" raid_level=1 stripe_size=128 size=100gb
Unit 23 can NOT be created because of volume overlapping!
Usage: 'add unit <#> raid_level=R
data=diskrange
[spare=diskrange]
[stripe_size=S]
[size=X<GB|MB>]
[max_boot=<enable/disable>]
[cache=<enable/disable>]
#={0-31} / R={0,1,5,ADG} / X={positive integer} / S={8,16,32,64,128,256}
diskrange examples: DISK101
DISK101-DISK105
"DISK101 DISK112-DISK202 DISK314"
DISKxyy: x={1,2,3} (box #) / yy={01-14} (bay #)
ex: DISK111 - disk in box 1, bay 11
max_boot is enabled by default. it can be disabled for OS's that don't
support the creation of bootdrives > 4GB
cache is enabled by default. enables/disables cache for the new unit.
add unit creates a new logical unit using the specified settings

[Torsten.]

This is what I expected.

All 40 disks are part of the array, the smallest disk (146GB) sets the limit of size.

In the configuration you currently have, the additional space is just wasted. The only way around is to backup all the data, create an array on the 146GB disks, another array on the 300GB disks, create the LUNs you need and restore the data.

IMHO this is the only way, unless you replace all 146GB disks with 300GB.

From the user guide:

Use physical drives of comparable capacity.
ACU uses the same amount of space from each physical drive to build an
array. Because this amount cannot exceed the capacity of the smallest
drive, the extra capacity of any larger drive in the array is unused.

From Install Guide:

Hard Drive Sizes and Types

Arrays should be composed of hard drives of the same size and type. When drive

types are mixed within a storage enclosure,the usable capacity and the processing

ability of the entire storage sub-system is affected.

Fo r e x a m p l e, when an array is composed of different sized drives, the array

defaults to the smallest individual drive size, and capacity in the larger drives goes

unused. Similarly, when different drive types are included in the same enclosure,

the processing characteristics of the entire enclosure are reduced to that of the

slowest drive.

Sorry.