HBA: The cable port on the host is the host bus adapter (HBA)
CHA: The cable port on the storage subsystem is a port (P) on a channel adapter (CHA)
------------------------------------
Product : 9500V
SerialNumber : 6123
LUs : 12
iLU SLPR HDevName VG OSPathID PathID PathName ChaPort CLPR Status Type IO-Count IO-Errors DNum IEP
0062 - hdisk11 - 00000 000000 08.06.0000000000210300.0000 1A - Online Own 0 0 0 -
00001 000006 09.06.0000000000211300.0000 1B - Online Own 0 0 0 -
00002 000007 08.07.00000000000E0600.0000 0C - Online Non 0 0 0 -
00003 000009 09.07.00000000000E1600.0000 0D - Online Non 0 0 0 -
Product : USP
SerialNumber : 0022137
LUs : 9
iLU SLPR HDevName VG OSPathID PathID PathName ChaPort CLPR Status Type IO-Count IO-Errors DNum IEP
016F 0 hdisk46 - 00000 000024 08.06.00000000000B8800.0000 3A 0 Online Own 3201989 0 0 -
00001 000025 09.06.00000000000BA600.0000 3E 0 Online Own 3201945 0 0 -
00002 000092 08.07.0000000000240A00.0000 4A 0 Online Own 3198945 0 0 -
00003 000106 09.07.0000000000242A00.0000 4E 0 Online Own 78042543 0 0 -
PathID: HDLM manages a path by assigning an ID to it.
OSPathID: The ID that AIX assigns to a path (lspath shows it as well)
Product:9500V - HDLM performs load balancing between owner paths or between non-owner paths.
Owner paths are coming from the same CHA. Non-owner paths are coming from the other CHA.
Load is balanced first between the owner paths, if all the owner paths are lost, then between the non owner paths.
Product:USP - All the paths are owner paths.
Load is balanced among all the paths.
Status:
Online I/O can be issued normally
Online (E) An error occured on the path, and none of the other paths are in Online staus (it still can be used)
Offline (C) Path was placed offline by using the command (manually)
Offline (E) I/O cannot be performed, because an error occured in the path
------------------------------------
The location of the scripts: /usr/DynamicLinkManager/bin/
DLMManager logs: /var/DynamicLinkManager/log
Operation logs (command history): /var/opt/hitachi/HNTRLib2/spool/hntr2[1-16].log
The location of config file: /usr/D*/drv/dlmfdrv.conf
dlnkmgr view -help
dlnkmgr view -hba shows info about the hbas
dlnkmgr view -lu shows the status of the path (online is OK)
dlnkmgr view -path shows that which device uses which path
dlnkmgr view -path -srt lu useful command as: dlnkmgr view -lu -item
dlnkmgr view -lu -item all gives a full list
dlnkmgr view -cha shows storage channel port, serial number of storage box
dlnkmgr view -sys -lic shows license information
dlnkmgr view -drv shows storsge box serial, and iLU numbers
dlnkmgr online -help
dlnkmgr online -pathid 000023 puts a path to online state
dlnkmgr offline -hba <adapter> puts an hba to offline state (dlnkmgr offline -hba 08.08)
SETTINGS:
dlnkmgr view -sys shows sytem settings (HDLM version,load balance, health checking...)
root@aix41: / # dlnkmgr view -sys
HDLM Version : 05-94
Service Pack Version :
Load Balance : on(rr)
Support Cluster :
Elog Level : 3
Elog File Size (KB) : 9900
Number Of Elog Files : 2
Trace Level : 0
Trace File Size (KB) : 1000
Number Of Trace Files : 4
Path Health Checking : on(30)
Auto Failback : off
Intermittent Error Monitor : off
dlnkmgr set -help
dlnkmgr set -lb on -lbtype rr sets load balancing on (rr:round robin, rr is recommended not exrr: extended rr)
dlnkmgr set -pchk on -intvl 10 sets path health checking on (invl: checking interval (in minutes))
dlnkmgr set -afb on -intvl 10 sets automatic failback on
dlnkmgr set -iem on -intvl 20 -iemnum 2 sets intermittent monitoring on (interval 20 min, the number of times the error is to oocur 2)
dlnkmgr set -ellv 3 sets the error log collection level (3 is recommended, 0:no log, 1:errors only, 2:1+warnings, 3:2+infos)
dlnkmgr set -systflv 0 sets trace level (0 is recommended, after an error could be set to higher (1) to collect logs)
dlnkmgr set -elfs 9900 sets the error log file size in KB (9900 is recommended)
dlnkmgr set -elfn 2 sets the number of error log files (2 is recommended)
dlnkmgr set -systfs 1000 sets the trace file size (1000 is recommended)
dlnkmgr set -systfn 4 sets the number of trace files (4 is recommended)
dlnkmgr set -rsv on 2 sets the reservation level (2 is recommended it means persistent res. level, 0:ignore reservation)
(it's important for reserving disks, if a LUN is not supporting it, it won't reserve the disk)
dlnkmgr clear -pdst this clears the statistics (I/O counts and I/O errors)
dlmcfgmgr configures dlm devices
dlmrmdev removes dlm devices (/usr/D*/bin/dlmrmdev) (dlmrmdev -A makes umount, varyoff, rmdev)
dlmpr it clears persistent reservation in clustered environment
dlmpr -k hdiskX shows the reservation key
dlmpr -c hdiskX clears the reservation key
------------------------------------
lssrc -a | grep -i dlm shows if HDLM Manager running (startsrc/stopsrc -s DLMManager)
------------------------------------
changing FC adapter settings (for dualpath):
dlnkmgr offline -hba 08.08 (full delete: dlmhbadel fscsi0) (dlnkmgr offline -pathid 000001)
rmpath -p fscsiX <--sets define (rmpath -p fscsiX -d <--it will delete)
rmdev -Rl fcsX (rmdev -Rdl fscsiX <--careful with raw devices, as it will delete)
chdev -l fcs1 -a init_link=pt2pt
chdev -l fscsi1 -a dyntrk=yes -a fc_err_recov=fast_fail
cfgmgr (dlmcfgmgr if needed)
------------------------------------
Changing ODM parmaeters of the HDLM driver:
# odmget PdAt > /tmp/PdAtbackup_091119
# odmget -q"uniquetype=disk/fcp/Hitachi and attribute=reserve_policy" PdAt > /tmp/pdatreserve_policy
Edit /tmp/pdatreserve_policy
PdAt:
uniquetype = "disk/fcp/Hitachi"
attribute = "reserve_policy"
deflt = "no_reserve"
values = "no_reserve,single_path,PR_exclusive,PR_shared"
width = ""
type = "R"
generic = "DU"
rep = "sl"
nls_index = 96
# odmchange -o PdAt -q"uniquetype=disk/fcp/Hitachi and attribute=reserve_policy" /tmp/pdatreserve_policy
25 comments:
Hi,
Whether the hitachi LUNs can be used via normal sddpcm driver?
This is written at IBM site:
"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 V7000, the IBM TotalStorage DS family and IBM BladeCenter S SAS Raid Controller Module (RSSM)."
No Hitachi with SDDPCM, but with AIX default PCM (MPIO) it is working (as far as I know).
Hi AIX, need some clarifications,
what are command to check the lun id of xiv storage, hitachi
storage, emc storage, ibm storage
Regards,
Bittu
Hi Bittu,
xiv: I don't know
hitachi: dlnkmgr view -lu
emc: powermt display dev=all
ibm storage (ess): datapath query device
Regards,
Balazs
where to download the Hitachi storage drivers ? Please Give me the Link
no idea
Hi ,
How to delete the HDLM for the disk ..for example rootvg should not have hdlm orelse it wont boot right ...like dlmfdrv13 is device name for disk otherthan rootvg ...so once san team give disk we will get it as dlmfdrvXX..but we want to delete tht ..please tell me how to remove ?
this is hdlm version HDLM Version : 05-81
i want to mirror rootvg . so disk shd not have hdlm
Hi, command "dlmrmdev" removes dlm devices (/usr/D*/bin/dlmrmdev) (dlmrmdev -A makes umount, varyoff, rmdev)
I'm ot sure if this is the correct procedure if rootvg is on DLM devices.
dlmrmdev --- this command with remove the dlm only for ...disk which are not in the vg ...i tried this cmd ..for the disk which are in vg i mean active it will say busy ..but for the disk which not in vg or not active will remove dlm ...so dlmrmdev is the only cmd to use ...we don have dlmrmdev dlmfdrvXX or something like that ..
You can used command dlmchpdattr to change attributes reserve_policy,max_transfer,queue_depth and rw_timeout
/usr/DynamicLinkManager/bin/dlmchpdattr
{-a Attribute=Value [Attribute=Value ...]
[-u { HTC | XP }] [-A] [-s]
| -o
| -h}
Hi Thanks for the nice blog, I am asked to upgrade my HDLM , where can i get the new version, Is there link to get new version of HDLM, or what do I do? I saw a lots of documentation online how to upgrade HDLM version, but I don't where to get those, Can you help me up here???
Hi, I think official Hitachi support can help you in that
Hello please let us know how to check the hitachi related commands at the cleint end which has npiv enabled evices.fcp.disk.Hitachi.array.mpio.rte is the mpio fileset installed
/usr/bin/xiv_devlist for xiv
thx!
Hitachi ODM updates for AIX:
https://tuf.hds.com/instructions/servers/AIXODMUpdates.php
get idea
Will LPM work for Power 7 and Power 8 NPIV capable AIX servers, for direct SAN attached storage where we have HDLM installed
All my disk are from SAN and I need to upgrade the HDLM driver . After some googling I understand that we need to remove all the HDLM configured SAN disks before the upgrade . But my rootvg disk is also having HDLM , so how can I proceed with the upgrade ?
Can somebody tell me why is this occuring, I see that on corresponding servers that dlmchangedev was not found and it was working properly.
# chpath -l hdisk6 -p fscsi1 -s enable
Method error (/usr/DynamicLinkManager/bin/dlmChangeDev):
0514-068 Cause not known.
sh: /usr/DynamicLinkManager/bin/dlmChangeDev: not found.
rmpath fixed the issue, Need to delete and reconfigure hdlm
thx for info :)
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