What is Sddpcm?
SDDPCM is a loadable path control module designed to support the multipath configuration environment in the IBM TotalStorage Enterprise Storage Server, the IBM System Storage SAN Volume Controller, the IBM Storwize family, the IBM Flash System V840 and V9000, the IBM TotalStorage DS family and IBM BladeCenter S SAS …
What is multipath in AIX?
Multipathing. A path describes a route from the HBA port in the host (through the switches in the fabric) into a storage port on the storage array. When more than one HBA ports are cabled, a host can access a LUN through more than one path, which is called multipathing.
How do I disable Mpio in AIX?
Use the vxmpio utility to disable or enable MPIO for devices with the specified product ID (pid). You must reboot the system for the changes to take effect. When you disable MPIO, the specified devices are claimed under the Veritas Dynamic Multi-Pathing driver after the reboot.
What is Cfgmgr in AIX?
Description. The cfgmgr command configures devices and optionally installs device software into the system. The configurable devices are controlled by the Configuration Rules object class, which is part of the Device Configuration database.
How do I view disk details in AIX?
Hi, #bootinfo -s hdiskX–> gives the size of the given disk. If you need the size of all the disks, check for the disks which are all available. It gives the sizes of all the disks.
What is Cfgmgr in Linux?
Description. The cfgmgr command configures devices and optionally installs device software into the system. The devices to be configured are controlled by the Configuration Rules object class, which is part of the Device Configuration database.
How do I scan on AIX?
AIX tech tip: How to scan new devices with a single command
- Discover new devices with cfgmgr. The command cfgmgr needs to be run with root permissions.
- Locate your child! It sometimes happens that you only want to discover the child devices of a single adapter.
- List device classes.
- Resources on the IBM Knowledge Center.
How do I list a drive in AIX?
In order to list information about all logical volumes, you would need to use “lsvg” to list all volume groups, and then use “lsvg -l ” on each volume group. You could then use “lslv ” to list the detailed information about each logical volume found.
How do I find my PP size in AIX?
AIX can use the specific numbers as the PP size. and the pp size is the constant one.. which means it should be in any one of the below numbers. 1, 2, 4, 8, 16, 32, 64,128,512,1024, (MB). ….How to calculate PP size in aix?
| Scalable Volume Groups | |
|---|---|
| hdisk size between: | Default PP Size |
| 2,040MB – 4,080MB | 2 MB |
| 4,080MB – 8,160MB | 4 MB |
| 8,160MB – 16,320MB | 8 MB |
How do you add a LUN in AIX?
How to extend vg by adding a LUN on AIX
- Assign the LUN to the same server in the storage subsystem.
- run cfgmgr on server.
- it will give u one new hdd.
- extend ur vg to add this new disk.
- check with lsvg command for new size.
What commands AIX?
The which command takes a list of program names and looks for the files that run when these names are given as commands. The which command expands each argument, if it is aliased, and searches for it along the user’s path. The aliases and paths are taken from the . cshrc file in the user’s home directory.
How are non-preferred paths designated in’pcmpath query portmap’output?
In ‘pcmpath query portmap’ output, non-preferred paths are designated by lower case letters ‘y’, ‘o’ and ‘n’.
Does power 9 support the aixpcm multi-path driver?
AIX 5.3 does not support the AIXPCM multi-path driver with IBM Storage. Only AIX 6.1 TL09 SP12 and above are supported. Power 9 hardware platforms and related OS levels were not tested with SDDPCM, only AIXPCM. Therefore, P9 does not support SDDPCM on any version of AIX.
What is the default path selection algorithm for aixpcm?
Note3: The default path selection algorithm for AIXPCM is “fail_over”. The AIX PCM supports the “shortest_queue” algorithm which is similar to SDD PCM’s “load_balance” algorithm. The chdev command may be used to set the algorithm, though it may also be necessary to set the reserve policy when changing the algorithm.
What happens when I switch from sddpcm to Aix PCM?
If the disks being switched from SDDPCM to AIX PCM are shared among multiple nodes in a cluster or VIOS configuration, this default reservation policy must be changed before the disk is opened. If this is not changed, other nodes in the cluster or VIOS configuration will lose access to the shared disks until the reservation policy is changed.