When adding physical tape library using add device process fails with “Failed to add device, reason: Failed to build device tree”
When adding the same physical tape library and adding the drive manually no drives are seen
Looking at the library when adding noticed that library reports 6 drives
Checked windows device manger and windows only displays 2 drives
Versified SAN configuration to find that only 2 drives were zoned/connected to the SAN
Progressed with the assumption that NetVault would add the two drives it finds and ignore the drives it cannot find because not zoned/connected. Collected trace for further diagnose.
Note: “Web Service Worker” trace is required to diagnose this issue so this will need to be enabled as not enabled by default.
Analysis from trace extract below we can see the two drive connected reported, it is also noticed that all other drives report “Failed to find drive for bay” then we see the add library process fail with “Failed to build device tree”
Extract from Web Service Worker trace:
2 WSPROV ??? 5948 2100 0 122318946727 Now have 2 drives in Drives list
2 WSPROV ??? 5948 2074 0 122318946939 Adding the Library...
2 WSPROV ??? 5948 2075 0 122318949265 Library has 6 drives
2 WSPROV ??? 5948 2076 0 122318949273 Drive 1
2 WSPROV ??? 5948 2077 0 122318949286 Drive Bay 1: Drive 'Drive Bay 1'; Client 'WDS01'
2 WSPROV ??? 5948 2078 0 122318949319 Getting drive 1 of 2
2 WSPROV ??? 5948 2079 0 122318949326 Added Drive '1-0.3.0 (IBM ULTRIUM-TD3)' to Library device tree
2 WSPROV ??? 5948 2080 0 122318954033 Have 0 entries oSharedDriveList
2 WSPROV ??? 5948 2076 0 122318954041 Drive 2
2 WSPROV ??? 5948 2077 0 122318954054 Drive Bay 2: Drive 'Drive Bay 2'; Client 'WDS01'
2 WSPROV ??? 5948 2078 0 122318954108 Getting drive 2 of 2
2 WSPROV ??? 5948 2079 0 122318954123 Added Drive '4-0.1.0 (IBM ULTRIUM-TD3)' to Library device tree
2 WSPROV ??? 5948 2080 0 122318961200 Have 0 entries oSharedDriveList
2 WSPROV ??? 5948 2076 0 122318961209 Drive 3
2 WSPROV ??? 5948 2077 0 122318961221 Drive Bay 3: Drive 'Drive Bay 3'; Client 'WDS01'
2 WSPROV ??? 5948 2078 0 122318961230 Getting drive 3 of 2
0 WSPROV ??? 5948 2084 0 122318961240 Failed to find drive for bay '3'
2 WSPROV ??? 5948 2076 0 122318961248 Drive 4
2 WSPROV ??? 5948 2077 0 122318961257 Drive Bay 4: Drive 'Drive Bay 4'; Client 'WDS01'
2 WSPROV ??? 5948 2078 0 122318961265 Getting drive 4 of 2
0 WSPROV ??? 5948 2084 0 122318961274 Failed to find drive for bay '4'
2 WSPROV ??? 5948 2076 0 122318961282 Drive 5
2 WSPROV ??? 5948 2077 0 122318961292 Drive Bay 5: Drive 'Drive Bay 5'; Client 'WDS01'
2 WSPROV ??? 5948 2078 0 122318961299 Getting drive 5 of 2
0 WSPROV ??? 5948 2084 0 122318961309 Failed to find drive for bay '5'
2 WSPROV ??? 5948 2076 0 122318961318 Drive 6
2 WSPROV ??? 5948 2077 0 122318961328 Drive Bay 6: Drive 'Drive Bay 6'; Client 'WDS01'
2 WSPROV ??? 5948 2078 0 122318961337 Getting drive 6 of 2
0 WSPROV ??? 5948 2084 0 122318961345 Failed to find drive for bay '6'
0 WSPROV ??? 5948 2087 0 122318961351 Failed to build device tree
NetVault unable to add library because no SAN connection to drives reported by library.
1/ Configure the SAN to see the drives
2/ If not possible to add the drives to the SAN due to hardware/environment limitations edit the library partition and remove the drives that are not configured on the SAN from the library partition.
Note: To remove the drives from library partition will be different process for every library so refer to the user/configuration guide of the library for this process.
