Unsolved
This post is more than 5 years old
21 Posts
0
1431
September 15th, 2015 08:00
What does get_group_volumes UID field show for XtremIO
For other arrays the UID is the WWN of the volume on the array, but for XIO it doesn't seem to relate.
I have UID=bb,39,49,47,4f,0f,4c,d5,85,ca,de,38,c9,1f,27,16
for the production volume, but on the (windows) host that shows with a WWN (short format) of 514F0C57B500000B
Similarly I have the copy volume masked to a different host and the UID shows as
UID=73,7a,92,ae,eb,c0,4a,02,8d,90,eb,a9,62,a1,6a,07
but on my host I find a WWN of 514F0C57B5000047
With RP over vmax or VNX or VPLEX the UID matches the wwn of the volume of the host. What is it for XIO and how can I translate it to something I can see on my host?
No Events found!
Idan
675 Posts
0
September 16th, 2015 05:00
Hello there,
This is a known matter in which RP displays a different NAA format than the one inq and multipathing software displays for XtremIO volumes.The plan is to fix that in upcoming version. Until that happens, I would recommend relying on either the LUN name (which might not be unique if using multiple XtremIO clusters) or use sg_inq --page=0x83 for UNIX hosts.
Note that in the output of sg_inq --page=0x83 , the NAA (device UID) that RP displays would be listed under "Designation descriptor number 5".
Hope that helps,
Idan Kentor
RecoverPoint Corporate Systems Engineering
GKG12345
21 Posts
0
September 17th, 2015 00:00
We are working from code page 83. We'll look for the descriptor 5 as you suggest. Maybe we'll look at multiple descriptors if this may change in a future release. The base problem we have is to figure out on our system which LUN is in fact the one that the RP group copy shows. I guess we can see if it matches any of the descriptors. Many thanks for the answer.
GKG12345
21 Posts
0
September 17th, 2015 04:00
Idan - I'm slightly confused that the UID starts with 7 -
I know of NAA WWN id's starting with 1,2,5 or 6. Is 7 a new format? I'll get a full dump of the code page 83 and see if we can find the Id that RP shows anywhere.
Idan
675 Posts
0
September 18th, 2015 12:00
Hi,
The descriptor that RP uses (currently is NAA6, if it isn't available then NAA3 or the first available descriptor if it isn't available) can be found by looking at page 0x83 of any XIO volume and grepping 1 line above "Designation descriptor number 6".
Hope that helps,
Idan Kentor
RecoverPoint Corporate Systems Engineering
idan.kentor@emc.com
Idan
675 Posts
0
October 6th, 2015 04:00
For everyone's benefit, here's another workaround:
Match the rawUid which RP uses and the naaUid which the hosts use by running the REST GET call /groups/{groupId}/settings.
The rawUid represents NAA3/6 while naaUid represents NAA5 in case of XtremIO.
This can be matched specifically for XtremIO volumes by checking if vendorName equals “XtremIO” in the same REST call.
Note that the rawUid and naaUid values shown in REST is Decimal.
Hope that helps,
Idan