12-28-2018
Hi dkmartin,
From the way you describe the layout, I'm going to assume that you're running something like SVC for the management of the LUN's. Are the AIX environment LPAR's or are they standalone machines, or something else of course.
Managing LUN's accross six individual SAN devices is very costly in resource, along with the planning headache when it comes to new system builds - well inless you have plenty of disk. I currently have two devices - a 1.5Pb VMax and a 250Gb VNX and that provides enough confusion.
Where ver possible our approach is to go for a single LUN, but we do have quite a number of systems with large numbers of luns (some are in excess of 200) on AIX, Solaris and RHEL. We do have some very old versions on VMware, but they are slowly being decommissioned.
So in reality I would if time permits look at load and I/O on a system by system basis, where the results indicate there would be a benefit - replicate the existing model. If the results show it would be OK, go for the single LUN, if you're using Metro or Global mirror you may have to delve a bit deeper and look at inter system bandwidth.
Regards
Gull04
5 More Discussions You Might Find Interesting
1. Solaris
Thinking of using our San for network backups..
Have a Netra 240 being installed and planning to get some space on our San.
Do you know what software is used to access the San from my server or what I would need to do? I know how to connect to local storage, disk arrays etc but not sure what... (1 Reply)
Discussion started by: frustrated1
1 Replies
2. Solaris
Hi,
I have configured our SAN Storage to be connected to our new SUN T5220.
On the SAn it looks all fine
on the server I do not see any connection:
cfgadm -al
Ap_Id Type Receptacle Occupant Condition
c1 scsi-bus connected ... (4 Replies)
Discussion started by: manni2
4 Replies
3. SuSE
Hi, Here is the issue. Some more memory has been added from vCenter to the virtual machine. From the virtual machine running SuSE 11 SP3.
# modprobe acpiphp
# modprobe acpi-memhotplug
# grep -v online /sys/devices/system/memory/*/state
#
It looks like there is no offline memory, but free... (1 Reply)
Discussion started by: aixlover
1 Replies
4. UNIX for Dummies Questions & Answers
Good Morning everyone,
I want to know how to allocate unallocated drive space from a SAN to a file system that desperately needs the drive space. Does anyone have any documentation or tips on how to accomplish this? I am running on AIX version 6.1. (2 Replies)
Discussion started by: ryanco
2 Replies
5. Homework & Coursework Questions
Hi Team,
How do i mount or connect the SAN storage to a specific folder. I have tried to mount it but each time i can only mount 900GB of the storage to the folder:
ipmi1 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-root_vol
... (0 Replies)
Discussion started by: ElVista
0 Replies
LEARN ABOUT CENTOS
scsi-rescan
RESCAN-SCSI-BUS.SH(1) User Commands RESCAN-SCSI-BUS.SH(1)
NAME
rescan-scsi-bus.sh - script for adding and removing SCSI devices without rebooting
SYNOPSIS
rescan-scsi-bus.sh [options] [host [host ...]]
OPTIONS
-a, --alltargets
scan all targets, not just currently existing [default: disabled]
-d enable debug [default: 0]
-l activates scanning for LUNs 0--7 [default: 0]
-L NUM activates scanning for LUNs 0--NUM [default: 0]
-w, --wide
scan for target device IDs 0--15 [default: 0--7]
-c enables scanning of channels 0 1 [default: 0 / all detected ones]
-r, --remove
enables removing of devices [default: disabled]
-f, --flush
flush failed multipath devices [default: disabled]
-i, --issue-lip
issue a FibreChannel LIP reset [default: disabled]
-u, --update
look for existing disks that have been remapped
-s, --resize
look for resized disks and reload associated multipath devices, if applicable
--forcerescan
rescan existing devices
--forceremove
remove and readd every device (DANGEROUS)
--nooptscan
don't stop looking for LUNs is 0 is not found
--color
use coloured prefixes OLD/NEW/DEL
--hosts=LIST
scan only host(s) in LIST
--channels=LIST
scan only channel(s) in LIST
--ids=LIST
scan only target ID(s) in LIST
--luns=LIST
scan only lun(s) in LIST
--sync, --nosync
issue a sync / no sync [default: sync if remove]
--attachpq3
tell kernel to attach sg to LUN 0 that reports PQ=3
--reportlun2
tell kernel to try REPORT_LUN even on SCSI2 devices
--largelun
tell kernel to support LUNs > 7 even on SCSI2 devs
--sparselun
tell kernel to support sparse LUN numbering
Host numbers may thus be specified either directly on cmd line (deprecated) or or with the --hosts=LIST parameter (recommended).
LIST: A[-B][,C[-D]]... is a comma separated list of single values and ranges (No spaces allowed.)
SEE ALSO
rescan-scsi-bus.sh Homepage: http://www.garloff.de/kurt/linux/#rescan-scsi
sg3_utils Homepage: http://sg.danny.cz/sg
rescan-scsi-bus.sh 1.57 leden 2014 RESCAN-SCSI-BUS.SH(1)