AIX mount points physical disks

but we are concerned about how the disks
hdisk* were created on the SAN side .
my understanding is that these hdisk* tht composes these lv's and VG's could be from 1 or more physical splinders on the SAN storage.

please advise.

It's not possible to find get this info using AIX commands.

You must find out the LUN ID of the hdisk in question with

lscfg -l hdiskx

and use this LUN ID on your SAN box to get allocation details.

Which SAN storage hardware do you use?

If in doubt please post the output of the above command, I think I will be able to assist you finding out the LUN ID.

A more straightforward way to find the LUN ID:

lsattr -HE -a lun_id -l hdiskx

@WMP,
   Unless there's another ID that Z1(via lscfg) represents, these don't match for us.

lsattr returns "30"
lscfg retruns "3B", which is what our Storage team sees as the LDEV ID on the SAN.

The "30" appears to come from the "L#" in the physical location field.
I'm guessing this may vary by SAN Vendor.


On one of our VIO servers:

# lsattr -HE -a lun_id -l hdisk33
attribute value           description            user_settable

lun_id    0x3000000000000 Logical Unit Number ID False
#
# lscfg -vl hdisk33
  hdisk33          U78A5.001.WIH6507-P1-C12-T1-W50060E80100542DD-L3000000000000  Hitachi Disk Array (Fibre)

        Manufacturer................HITACHI
        Machine Type and Model......DF600F
        Part Number.................
        ROS Level and ID............30303030
        Serial Number...............87011549
        EC Level....................
        FRU Number..................1549
        Device Specific.(Z0)........00000432B3001102
        Device Specific.(Z1)........003B
        Device Specific.(Z2).........
        Device Specific.(Z3).........
        Device Specific.(Z4)........2...
        Device Specific.(Z5)........
        Device Specific.(Z6)........

@Tomunique

the LUN ID of your disk is definitely "30", as returned by lsattr.

lscfg returns this ID as well, see the "-L30..." part in the location data.

The "Z1" value seems to be a particularity of HDS.

It could well be that HDLM would update this field with information obtained directly from the SAN box.

The IBM DS8000 constructs the LUN IDs passed to AIX according to this pattern:

"40"[left 2 digiits of volid]"40"[right two digits of volid]

That's why I asked for the particular SAN storage type (and implicitly for the driver used).
Taking this info along with "lscfg" we could perhaps advance a bit further.

wmp

lsattr -HE -a lun_id -l hdisk4

returns


lsattr: 0514-528 The "lun_id" attribute does not exist in the predefined
        device configuration database.

are you on an LPAR running behind a vio server?
If so, you'll have to look at the disks from the VIO server

we are using VIO yes
what to do?

thanks all