05-29-2008
Quote:
Originally Posted by
mark54g
try using google to find the script:
rescan_scsi_bus.sh
use it with the -w -l -c options
as always, please try it in a test environment first.
Hi,
Im sorry again that I wasnt clear... thanks for the tip...I think this script tries to discover new devices on the scsi host adaptor or HBA, i cant see anywhere in the script where it checks for the new sizes of the LUNs it discovers. It looks for new devices and new channels/id. On our system the LUNs are dynamic, so we can add more disks to the array to allocate more storage to the host, but Linux doesnt see the new increased size without rebooting.
Thanks in advanced.
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hello all,
I have looked at the entire posting that have SAN in it and I'm still fuzzy on how SAN works. I understand that every disk array can be access from any server that needs it, but is there software that is install or NFS mount type situation. One post stated that if your format command... (7 Replies)
Discussion started by: larry
7 Replies
2. AIX
hi
We have 2 AIX nodes running with HACMP and all of them connected to SAN,
Our shared storage is shark; I need to create shared volume group and I need the HACMP take a ware of it.
Regards (1 Reply)
Discussion started by: h2aix
1 Replies
3. Solaris
Hi everyone,
I wonder if I can canvas any opinions or thoughts (good or bad) on SAN attaching a SUN V880/490 to an EMC Clarion SAN?
At the moment the 880 is using 12 internal FC-AL disks as a db server and seems to be doing a pretty good job. It is not I/O, CPU or Memory constrained and the... (2 Replies)
Discussion started by: si_linux
2 Replies
4. Filesystems, Disks and Memory
I'm setting up a CentOS 5 server that will be connected to an HP EVA4000. My previous experience is with an HP VA7400 and HP-UX. In HP-UX I can add "alternate paths" to a volume group in order to have redundant paths to the SAN via dual fiber channel HBAs just by either adding them with... (3 Replies)
Discussion started by: deckard
3 Replies
5. Filesystems, Disks and Memory
Am trying to differentiate between the local disks and LUN's presented from SAN onto the server. Have Tried fdisk -l, however I quite cudn't differentiate the local disks from SAN presented LUN's.
Can you pls. let me know the procedure and commands to find this.
OS - RHEL 4
SAN - EMC... (3 Replies)
Discussion started by: Crazy_murli
3 Replies
6. Filesystems, Disks and Memory
Hi All,
Storage team assigned same SAN disk on two servers
how to create same paritations from same SAN disk on two linux servers
may i know options & procedure. But here one server writing on SAN disk and another server reading other files from SAN disks
Thanks in advance (1 Reply)
Discussion started by: kurva
1 Replies
7. AIX
Has anyone tried SAN to SAN mirroring on IBM DS SAN Storage.
DS5020 mentions Enhanced Remote Mirror to multi-LUN applications
I wonder if Oracle High availibility can be setup using Remote Mirror option of SAN ? (1 Reply)
Discussion started by: filosophizer
1 Replies
8. Linux
Is there a command I can run on my HP /LINUX to see if uses SAN? This command work son AIX ls -al /DEV/rdsk however it does not work on HP Linux. Please let me know?
Thanks (4 Replies)
Discussion started by: mrn6430
4 Replies
9. AIX
Hi all,
We are migrating our SAN storage from HSV360 to 3PAR. The system runs aix 6.1 version with HACMP.
Please let me know what are requirements from OS side and how are the data copied to the new disks. (10 Replies)
Discussion started by: ElizabethPJ
10 Replies
10. Filesystems, Disks and Memory
hi! i got a rhel 6.3 host that already have an xfs filesystem mounted from a SAN (let's call it SAN-1) whose size is 9TB.
i will be receiving another SAN (let's call it SAN-2) storage of 15TB size. this new addition is physically on another SAN storage. SAN-1 is on a Pillar storage while the new... (6 Replies)
Discussion started by: rino19ny
6 Replies
LEARN ABOUT DEBIAN
ql-dynamic-tgt-lun-disc
ql-dynamic-tgt-disc(8) System Administration ql-dynamic-tgt-disc(8)
NAME
ql-dynamic-tgt-lun-disc - Scans for newly added LUNs.
SYNOPSIS
ql-dynamic-tgt-lun-disc [OPTIONS]
DESCRIPTION
Dynamic TGT-LUN Discovery Utility
This utility scans for newly added LUNs. After adding new LUNs, you do not need to unload, then load the QLogic FC driver or reboot the
system
To begin scanning the LUNs issue following command:
# /usr/sbin/ql-dynamic-tgt-lun-disc
-al, --allow-lip
LIP is not issued by default, even if it is required for scanning new LUNs Setting this option, allows the utility to issue LIP.
-cl, --current-luns
Displays LUNS currently present
-e, --extended-scan
Use this option as "-e | --extended-scan". to rescan LUNs. This will identify any change in attributes of existing LUNs. This option
can be used in combination of scan/refresh or max luns
-h, --help, ?
Prints this help message
-i, --interactive
Use this option to use the menu driven program
-is, --iscsi
Use this option to operate on ISCSI HBAs, this option can be used in combination of any other supported option.
-m, --max-lun
To set the maximum LUNs to be scanned
-p, --proc
Use PROC file system for LUN scanning
-r, --refresh
To refresh, that is remove LUNs that are lost use the options "-r|--refresh". This will remove the LUNs which no more exist.
-s, --scan [ -r|--refresh ]
The QLogic LUN scan utility re-scans all the devices connected to the QLogic HBA
SEE ALSO
ql-lun-state-online(8), ql-hba-snapshot(8), ql-set-cmd-timeout(8)
Matthias Schmitz <matthias@sigxcpu.org> July 2009 ql-dynamic-tgt-disc(8)