To remove old / stale devices from AIX servers

Question

We have seen following issues on the server, and they are no longer been used, older or stale devices. They are shown in "symdev -sid 123 list", but not in " symaccess -sid 123 show view view_name". they are not in the storage group, but are still mapped, somehow, Please advice what can I do on the sever and/or on the array to get rid of these devices? Thank you!

server_name: /dev/rhdisk10 :EMC :SYMMETRIX :5875 xxxxxx : 2880

IDENTIFIER TIMESTAMP T C RESOURCE_NAME DESCRIPTION

F31FFAC3 1224120313 I H hdisk10 PATH HAS RECOVERED

02A8BC99 1224120313 P H hdisk10 PATH HAS FAILED

dynamox · Accepted Answer

are you sure these devices have not been re-purposed and presented to another host ?

symaccess -sid 123 list assignment -dev 1462

if nothing is returned then you will need to first make devices not ready or write disabled

symdev -sid 123 write_disable 1462

and then unmap it

symconfigure -sid 123 -cmd "unmap dev 1462 from dir ALL:ALL;" commit

dynamox · Answer

if they are truly removed, they you can use aix command 'rmdev -dl '

emcmagic · Answer

Got it.

When I run symdev -sid123 list, I can see the device is mapped to SA: P, although it is no longer in the disk group, what is the command to unmap it?

Before I tell the server admin to run rmdev -dl, I'd like to unmap first, Does that make any sense? Thanks!

emcmagic · Answer

I got nothing on 02A8 as the result of running symaccess -sid 123 list assignment -dev. So, I can unmap this one.

I got 2 ports (5G:0 and 12G:0) back on 0F31, and plus 8 associated identifiers (wwn's). Ports are the same as shown when I run " symaccess -sid 123 show view view_name" on this host's view. Should I then unmap only indentifier (wwn's) that the host is associating with? what is the command for that? Thanks for your patience!

dynamox · Answer

if device is not masked to any WWNs then go ahead and unmap it from all ports, what's the point of keeping it mapped ?

emcmagic · Answer

Hey dynamox,

when I run symaccess -sid 123 list assignment -dev 0F31, I do see ports are masked to 8 wwn's, they are just not hosts I have questions about. How do I find what hosts, the storage group, or view these wwn's are associating with?

Thank you!

dynamox · Answer

symaccess -sid 123 list view -v -detail pipe this to a file and search for the WWN.

VMAX

To remove old / stale devices from AIX servers

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