Idisk on 11.31 : strange sizes

[Jean Mesquida_1]

Hi all,

I'm trying to mirror boot disk on my new RX2660 which has been factory installed by HP with HP-UX 11.31.

First, I noticed that the size of slice 1 is unusual (not rounded to MB) as per diskinfo :

SCSI describe of /dev/rdisk/disk12_p1:
vendor: HP
product id: DH072ABAA6
type: direct access
size: 511968 Kbytes
bytes per sector: 512

Slices 2 and 3 are OK :
size: 70765568 Kbytes
size: 409600 Kbytes

When I try idisk with the usual partition file :

3
EFI 500MB
HPUX 100%
HPSP 400MB

The last slice (3) is created on the mirror disk with a size of 408736 KB instead of 409600 KB :

SCSI describe of /dev/rdisk/disk10_p3:
vendor: HP
product id: DH072ABAA6
type: direct access
size: 408736 Kbytes
bytes per sector: 512

This prevents me from creating the mirror of HPSP on slice 3. The usual dd fails with an I/O error :

# dd if=/dev/rdisk/disk12_p3 of=/dev/rdisk/disk10_p3 bs=1024k
I/O error
400+0 records in
399+1 records out

My question is : should I use the same procedure for mirroring boot disk on 11.31 as with 11.23 ? Is it a known problem ?

Thanks for your help !
JM

[Torsten.]

Strange.
Did you compare the other partitions too?

With the "normal" installation process for HPSP this shouldn't be a problem. You may try to use efi_cp instead.

BTW, I would think about to use the integrated RAID functionality to mirror the boot drive.

[Torsten.]

Forgot this:

should I use the same procedure for mirroring boot disk on 11.31 as with 11.23 ?

Yes, I did it many times.
But you should use diskxx and disk_py instead of cxtydz!

[Jean Mesquida_1]

Thanks for your answer !

I forgot to mention that this system has been ignited with a June 2007 11.31 version of HP-UX.

Sizes are as follows on the primary disk :

size: 511968 Kbytes
size: 70765568 Kbytes
size: 409600 Kbytes

And on the secondary :

size: 511968 Kbytes
size: 70766592 Kbytes
size: 408736 Kbytes

I first partitioned the disk using /dev/rdsk/c2t1d0 but, as per your answer, retried using /dev/rdisk/disk10 : the result is the same.

It seems I don't have any RAID controller on this RX2660 (no /dev/ciss... special file ans ioscan doesn't list RAID HBA).

I'll try efi_cp.
Thanks
JM

[Torsten.]

How about the size of the disk at all?

RAID:

Look for "sasdx" devices - this is the integrated SAS RAID controller.

[Torsten.]

ioscan should look like this:

escsi_ctlr 0 0/4/1/0 sasd CLAIMED INTERFACE HP PCI
/PCI-X SAS MPT Adapter
/dev/sasd0
ext_bus 1 0/4/1/0.0.0 sasd_vbus CLAIMED INTERFACE SAS Dev
ice Interface
...
target 19 0/4/1/0.0.0.1 tgt CLAIMED DEVICE
disk 2 0/4/1/0.0.0.1.0 sdisk CLAIMED DEVICE
HP IR Volume
/dev/dsk/c1t1d0 /dev/rdsk/c1t1d0
/dev/dsk/c1t1d0s1 /dev/rdsk/c1t1d0s1
/dev/dsk/c1t1d0s2 /dev/rdsk/c1t1d0s2
/dev/dsk/c1t1d0s3 /dev/rdsk/c1t1d0s3



This is an integrated RAID.
You will notice the "HP IR Volume".

[Eric SAUBIGNAC]

Hi Juan,

some more informations about sas controleur, not about your specific problem, sorry :-(.

1) At EFI level you can access a configuration menu of sas adapter with "drvcfg -s" and manage IR Volumes

2) At OS shell you can use 3 commands sasdiag, saslist and sasmgr (/opt/sas/bin).

For example you can issue the following command :

root@cduxliv1:/ >saslist get_info ctrl sasd
H/W Path: 0/4/1/0 HBA DSF: /dev/sasd0

then ...

root@cduxliv1:/ >sasmgr get_info -D /dev/sasd0 -q raid

Wed Jul 25 12:51:03 2007

---------- LOGICAL DRIVE 5 ----------

Raid Level : RAID 1
Volume sas address : 0x8e064cf787fc06f
Device Special File : /dev/rdsk/c1t0d0
Raid State : OPTIMAL
Raid Status Flag : ENABLED
Raid Size : 139236
Rebuild Rate : 0.00 %
Rebuild Progress : 100.00 %

Participating Physical Drive(s) :

SAS Address Enc Bay Size(MB) Type State

0x5000c500040728a5 1 8 140014 SECONDARY ONLINE
0x5000c50004074d45 1 7 140014 PRIMARY ONLINE
>

With sasmgr you can create, delete, manage LUNs.

Hope this will help
Eric

[Jean Mesquida_1]

Hi Enrique y muchas gracias por las informaciones ;-)

If I try to convert my existing vg00 from one single disk to one RAID1 entity, will this be a destructive process ?

Do I have to create a golden image of my server before ?

Thanks
JM

[Eric SAUBIGNAC]

Regardless wether it will be a destructive process or not, oeuf corse you MUST do an ignite image before.

Well, if you build the IR volume with "drvcfg -s" the interface will probably ask you if you want to preserve data. I have tried it once ... and i have lost all my data. I am not sure of what i did exactly, maybe i didn't understood the question (you can notice english is not my mother tong ;-), but the result was there. I didn't spent time to understand what has happened and i came immediatly in an ignite recovery process.

So, you should not rely on a non destructive migration process from single disk to RAID volume, unless someone in this forum can help you in this way.

Eric

[Jean Mesquida_1]

After contacting HP, the workaround is to allow 401MB for the HPSP partition.

The partition file then looks like this :

3
EFI 500MB
HPUX 100%
HPSP 401MB

Luckily, the HPUX partition remains equal on both disks :

Primary disk :
s1: 511968 Kbytes
s2: 70765568 Kbytes
s3: 409600 Kbytes

Secondary disk :
s1: 511968 Kbytes
s2: 70765568 Kbytes
s3: 409760 Kbytes

The HPSP is a bit more than 400MB, which is fine for accepting HPSP from the primary disk, copied by dd.

It works... but it's only a workaround : I'm waiting for an explanation from HP.
HTH
JM