Login or Register to Ask a Question and Join Our Community


AIX

sddpcm on vio

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Operating Systems AIX sddpcm on vio
# 1  
Old 08-06-2011
sddpcm on vio
I have same lun (hdisk3) assigned to 2 vios server (dual vio server) and this is mapped to the client lpar. I have sddpcm on the VIO.

On the VIOA, the attributes for fscsi1 and fscsi3 are set to fast_fail and dyntrk is set to yes

Now, if I do a lqueryvg -Atp on the hdisk3, I get a "DISK OPERATION ERROR" and a related fscsi1.

I am trying to understand , if this is due to scsi reserve issue or is it a zoning issue. With sddpcm, the hdisk reserve_policy is set to no_reserve by default.

I still have to find out if any errors are reported on the switch.

Code:
 # lspath -l hdisk3
Enabled hdisk3 fscsi1
Enabled hdisk3 fscsi1
Enabled hdisk3 fscsi3
Enabled hdisk3 fscsi3
 
# errpt | pg
IDENTIFIER TIMESTAMP  T C RESOURCE_NAME  DESCRIPTION
DCB47997   0806085511 T H hdisk3         DISK OPERATION ERROR
DCB47997   0806085511 T H hdisk3         DISK OPERATION ERROR
DCB47997   0806085511 T H hdisk3         DISK OPERATION ERROR
4B436A3D   0806085511 T H fscsi1         LINK ERROR
4B436A3D   0806085511 T H fscsi1         LINK ERROR

# 2  
Old 08-06-2011
Not sure if its the same for IBM storage but for EMC + Hitachi, a bug within AIX shows you no reserve despite the fact that the reserve is still on - so you might want to remove the reserve manually again just to be safe.
Regards
zxmaus
# 3  
Old 08-06-2011
How can I check that a reserve is on?

As a workaround, I have disabled the fscsi1 path on VIOA server and it I don't see any errors. However, I noticed all I/O's going thru just 1 path (path0) of the adapter (fscsi3) .
I was expecting the I/o to be balanced between Path0 and Path2 for hdisk3 .

Any thoughts ?


Code:
  VIOA
  
  pcmpath query device
  
  Total Dual Active and Active/Asymmetric Devices : 2
  
  DEV#:   2  DEVICE NAME: hdisk2  TYPE: 2145  ALGORITHM:  Load Balance
  SERIAL: 600507680190814C7800000000000358
  ==========================================================================
  Path#      Adapter/Path Name          State     Mode     Select     Errors
      0*          fscsi3/path2          CLOSE   NORMAL          0          0
      1           fscsi3/path3          CLOSE   NORMAL          0          0
      2           fscsi1/path0          CLOSE   NORMAL          0          0
      3           fscsi1/path1          CLOSE   NORMAL          0          0
  
  DEV#:   3  DEVICE NAME: hdisk3  TYPE: 2145  ALGORITHM:  Load Balance
  SERIAL: 600507680190814C780000000000035D
  ==========================================================================
  Path#      Adapter/Path Name          State     Mode     Select     Errors
      0           fscsi3/path2           OPEN   NORMAL     106590          0
      1*          fscsi3/path3           OPEN   NORMAL          0          0
      2           fscsi1/path0           OPEN  OFFLINE          0          0
      3*          fscsi1/path1           OPEN  OFFLINE          0          0
  
  
  VIOB
  
  
  # r
  pcmpath query device
  
  Total Dual Active and Active/Asymmetric Devices : 2
  
  
  DEV#:   1  DEVICE NAME: hdisk1  TYPE: 2145  ALGORITHM:  Load Balance
  SERIAL: 600507680190814C7800000000000359
  ==========================================================================
  Path#      Adapter/Path Name          State     Mode     Select     Errors
      0*          fscsi3/path3          CLOSE   NORMAL          0          0
      1           fscsi3/path2          CLOSE   NORMAL          0          0
      2           fscsi1/path0          CLOSE   NORMAL          0          0
      3*          fscsi1/path1          CLOSE   NORMAL          0          0
  
  DEV#:   3  DEVICE NAME: hdisk3  TYPE: 2145  ALGORITHM:  Load Balance
  SERIAL: 600507680190814C780000000000035D
  ==========================================================================
  Path#      Adapter/Path Name          State     Mode     Select     Errors
      0           fscsi3/path2           OPEN   NORMAL         24          0
      1*          fscsi3/path3           OPEN   NORMAL          0          0
      2           fscsi1/path0           OPEN   NORMAL          0          0
      3*          fscsi1/path1           OPEN   NORMAL          0          0
  #


# 4  
Old 08-06-2011
actually you cannot really check if the reserve is on or off - but if you do the chdev on devices where it REALLY is off nothing is changing - so no harm done running it after any kind of storage work on both vios (and if you have clusters, on your lpars too)

Regards
zxmaus
# 5  
Old 08-07-2011
I did check and the reserve is set to off.

Another question, I have 2 physical FC adapters allocated to each of the VIO Server.

So, when I map the adapters to the hosts using vfcmap , Should I be mapping both the fcp to the vfchosts0 ? if yes, how ?


Code:
 
vfcmap -vadpater vfchost0 -fcp fcs1 
 
$ lsmap -npiv -vadapter vfchost0
Name          Physloc                            ClntID ClntName       ClntOS
------------- ---------------------------------- ------ -------------- -------
vfchost0      U8233.E8B.06D091P-V1-C14                3
 
Status:NOT_LOGGED_IN
FC name:fcs1                    FC loc code:U5802.001.9K8H757-P1-C3-T2
Ports logged in:0
Flags:4<NOT_LOGGED>
VFC client name:                VFC client DRC:

Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. AIX

Need Help with SDD / SDDPCM / MPIO

This is getting very confusing for me, and appreciate if someone can help. Platform: Power VM ( Virtual I/O Server) ioslevel 2.1.3.10-FP23 # oslevel -s 6100-05-00-0000 Storage: IBM DS4300 Two HBAs - Dual Port Fibre Adapter Channels Each card has two ports , so a total of 4 ports going... (3 Replies)
Discussion started by: filosophizer
3 Replies

2. AIX

VIO Server

Hi, I am facing an issue in vio server. When I run bosboot -ad /dev/hdisk0 I am getting an error trustchk: Verification of attributes failed: /usr/sbin/bootinfo : accessauths regards, vjm Please use code tags next time for your code and data. (8 Replies)
Discussion started by: vjm
8 Replies

3. AIX

vio server ethernet to vio client ethernet(concepts confusing)

Hi In the vio server when I do # lsattr -El hdisk*, I get a PVID. The same PVID is also seen when I put the lspv command on the vio client partition. This way Im able to confirm the lun using the PVID. Similarly how does the vio client partition gets the virtual ethernet scsi client adapter... (1 Reply)
Discussion started by: newtoaixos
1 Replies

4. Red Hat

vio in linux

I am working in AIX. In a P series machine both aix and linux os can install.. specific command is there for aix to list out the vio servers details mapped in a frame(ie. lssrc "IBM.ManagementServer", like that..) is there any command is der to list out vio servers details in linux or how to find... (1 Reply)
Discussion started by: muralikrish
1 Replies

5. AIX

Vio Build

I am planning carving out dual VIO servers on a P750 based and would like to know how to allocate internal disks to the VIOS. This has 4 internal disks and I would to assign 2 disks to each VIO. This is what I was thinking of assigning . Any advise? vio1 U5802.001.9K8H757-P1-C1 PCI-E x8... (17 Replies)
Discussion started by: mk8570
17 Replies

6. AIX

Upgrading from native MPIO to SDDPCM AIX 6.1

We have AIX 6.1 system attached to SAN disks (DS4700 and DS8100) thru SVC. Initially when the system was I forgot to install sddpcm drivers. and wanted to know how can i go with the installation of the sddpcm drivers. My understandin going thru the manual ... (3 Replies)
Discussion started by: mk8570
3 Replies

7. AIX

VIO Redundancy

Hi Guys, I'm working on building a new 595 machine.. I'm try to achieve high availability for the VIO clients using 2 VIO servers, The ethernet part is satisfied using SEA failover, Now how do I achieve redundancy for the disks, its the servers internal disk attached to the scsi cards... ... (2 Replies)
Discussion started by: kkeng808
2 Replies

8. AIX

AIX with SDD to VIOed SDDPCM?

Hi folks. We want to move a "physical" AIX box to a VIOed LPAR. The physical box is running SDD with disks from a DS8300. I want to be able to reattach those LUNs from the DS8300 to my VIO server which is running SDDPCM and then assigned them back to my AIX LPAR. Any thoughts about this? I... (1 Reply)
Discussion started by: Stephan
1 Replies

9. AIX

vio server and vio client

Hi, I want to know wheather partition size for installation of vio client can be specified on vio server example If I am installing vio server on blade with 2*300gb hard disk,after that I want to create 2 vio client (AIX Operating system) wheather I can specify hard disk size while... (1 Reply)
Discussion started by: manoj.solaris
1 Replies

10. AIX

SDD SDDPCM MPIO lspath Jargon

Can anyone recommend me some reading material surrounding how AIX handles LUNs: - with and without MPIO installed - with and without SDD or SDDPCM installed Where does lspath sit in all of this (MPIO layer?). Can a system be built with just MPIO software? Is MPIO software even needed? I guess... (0 Replies)
Discussion started by: apra143
0 Replies
Login or Register to Ask a Question