3par: Why can't I create a RAID 5 TPVV?

[Jeremy C]

I have a RAID 5 CPG but when I create a TPVV it's RAID 1.  If I create a Full provisioned VV then it's RAID 5.

Can someone shed some light on this?

[Sheldon Smith]

(Off the top of my head, without a screen to refer.)

Without more information as to just what it is you are seeing, I'm going to guess you are looking at the information about the "admin" space. You want to be looking at the information about the "copy" (non-admin) space. Anything dealing with the admin file and admin space is always RAID1.

(Don't forget to click the Kudos star)

[Jeremy C]

Attaching screenshots.  One is of the CPG (raid5).  One is of a TPVV within that CPG.  Hope that helps.

[eddolle]

Forgive me for this question as it has been two years since I worked on a 3PAR system:

Isn't there an option to set the raid level when creating the volume?

[Sheldon Smith]

Jeremy: In that case, I'm not sure. I don't suppose the CPG was changed to RAID5 after the Virtual Volume was created? You may need to open a call with HP 3PAR Support. Would you perhaps email me your array serial number to ebc.sheldon6129 at mamber.net?

eddole: There was, but with recent versions of the HP 3PAR OS (2.3.1 and later), the ability to create a VV from physical disk chunklets has been deprecated. There is no advantage to not using CPGs when creating VVs.

[Bart_Heungens]

Hi,

Do you have AO enabled? Because with AO it is possible that some volumes appear in another CPG level...

Other possibility: check via CLI... I noticed already that the GUI is not always showing the latest up2date information. CLI is always correct...

Kr,

Bart

[eddolle]

Thanks for the reply Sheldon. I have to admit that when I was working on a 3PAR SAN (The S400, this was before HP purchased them) we always used CPGs.

[Dennis Handly]

>Anything dealing with the admin file and admin space is always RAID1.

It looks like you're right:

# showvv vv_r5*
                                                     --Rsvd(MB)--- -(MB)-
Id Name    Prov Type CopyOf BsId Rd -Detailed_State- Adm  Snp  Usr  VSize
20 vv_r5   tpvv base ---      20 RW normal           128  512  512   1024    (RAID 5)
21 vv_r5_2 tpvv base ---      21 RW normal           128  512  512   1024 (RAID 5)
22 vv_r5_3 tpvv base ---      22 RW normal           128  512  512   1024 (RAID 1)

# showld -vv vv_r5*
Id Name        RAID -Detailed_State- Own SizeMB UsedMB Use  Lgct LgId WThru MapV

# For vv_r5 and vv_r5_2, both RAID 5:
28 tp-2-sa-0.0    1 normal           0/1   4096    128 C,SA    0  ---     N    Y
29 tp-2-sa-0.1    1 normal           1/0   4096    128 C,SA    0  ---     N    Y
30 tp-2-sd-0.0    5 normal           0/1  12288   1024 C,SD    0  ---     N    Y  <<<<
32 tp-2-sd-0.2    5 normal           1/0  18432   1024 C,SD    0  ---     N    Y  <<<<

# For vv_r5_3, RAID 1:

33 tp-0-sa-0.0    1 normal           0/1   4096     64 C,SA    0  ---     N    Y
34 tp-0-sa-0.1    1 normal           1/0   4096     64 C,SA    0  ---     N    Y
35 tp-0-sd-0.0    1 normal           0/1  16384    512 C,SD    0  ---     N    Y
36 tp-0-sd-0.1    1 normal           1/0  16384    512 C,SD    0  ---     N    Y

>CLI is always correct...

I sure hope so, especially if you use the right commands.  :-)