hpacucli gives 'Max array count reach' with HP Smart Array P420i raid controller on DL360p Gen8

[Decstasy]

Hello Asif,

according to the Controller specs you cannot add more logical volumes:
"Logical Drives Supported Zero Memory for embedded controller supports 
up to 2 logical volumes
512MB cache and greater, Up to 64 logical volumes" (see page 14: 
http://www8.hp.com/h20195/v2/GetPDF.aspx%2Fc04111534.pdf)

In your situation I would suggest you to buy more cache and reorganize 
it if possible. Configure the 4 drives as a raid 10 and the other two as 
raid 1.
You could keep the md raid but you will have more perfamnce withoud the 
md raid.

Another option would be to add your two new disks to the existing raid 
0's and extend everything in the OS.
Since I assume that the 300 GB drives will be faster than the new 1TB 
drives your server might get slower.

I hope I helped you ^.^

Best regards,
Dennis

Am 2016-05-07 07:27, schrieb Asif Iqbal:
> Here is the current config on my ubuntu 12.04.4 LTS on HP ProLiant
> DL360p Gen8
> 
> It has two disks configured as single disk lun (raid 0) and
> provisioned to the OS and built two linux software raid1
> 
> md0 : active raid1 sda1[0] sdb1[1]
>       499392 blocks super 1.2 [2/2] [UU]
> 
> md1 : active raid1 sda2[0] sdb2[1]
>       292304448 blocks super 1.2 [2/2] [UU]
> 
> This server has total of 6 disk slots and a cdrom, so 2 disks are
> 300GB each 4 disk slots are empty.
> 
> I brought two 1TB disks and installed in the server, but I can
> provision them to the OS through this raid controller.
> 
> Here is the current layout according to the raid controller
> 
> # hpacucli controller all show config
> 
> Smart Array P420i in Slot 0 (Embedded)
> 
> Note: Predictive Spare Activation Mode is enabled, physical drives
> that are in predictive failure state will not be available for use as
> data or spare drives.
> 
>   (sn: 5001238012340EC50)
> 
>    array A (SAS, Unused Space: 0  MB)
> 
>       logicaldrive 1 (279.4 GB, RAID 0, OK)
> 
>       physicaldrive 1I:1:1 (port 1I:box 1:bay 1, SAS, 300 GB, OK)
> 
>    array B (SAS, Unused Space: 0  MB)
> 
>       logicaldrive 2 (279.4 GB, RAID 0, OK)
> 
>       physicaldrive 1I:1:2 (port 1I:box 1:bay 2, SAS, 300 GB, OK)
> 
>    unassigned
> 
>       physicaldrive 2I:1:5 (port 2I:box 1:bay 5, SAS, 1 TB, OK)
>       physicaldrive 2I:1:6 (port 2I:box 1:bay 6, SAS, 1 TB, OK)
> 
> And when I try to provision any of those two new disks it fails with
> 'Max array count reached' like below
> 
> # hpacucli controller slot=0 create type=ld drives=2I:1:5 raid=0
> 
> Error: This operation is not supported with the current configuration.
> Use the
>        "show" command on devices to show additional details about the
>        configuration.
> Reason: Max array count reached
> 
> # hpacucli controller slot=0 create type=ld drives=2I:1:6 raid=0
> 
> Error: This operation is not supported with the current configuration.
> Use the
>        "show" command on devices to show additional details about the
>        configuration.
> Reason: Max array count reached
> 
> Is the raid controller that bad that it can only provision two raid0s
> max?
> 
> I will go with raid1 on the raid controller if this "smart" array raid
> controller is only build two raids
> 
> Since I am using ext4 and it has delayed allocation already (write
> behind) and I have plenty of
> memory and cpu resource I want to stick with software raid.
> 
> Thanks for any suggestion on a fix.
> 
> --
> 
> Asif Iqbal
> PGP Key: 0xE62693C5 KeyServer: pgp.mit.edu [1]
> A: Because it messes up the order in which people normally read text.
> Q: Why is top-posting such a bad thing?
> 
> 
> 
> Links:
> ------
> [1] http://pgp.mit.edu