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Full Discussion: Any tips to grow iSCSI LUN
Operating Systems AIX Any tips to grow iSCSI LUN Post 302516435 by bbbngowc on Saturday 23rd of April 2011 07:39:09 AM
Old 04-23-2011
Quote:
have you had a look in "errpt"? Is there anything relevant?
Yip. This is the last entry in the error report.

Date/Time: Wed Feb 9 11:54:46 EST 2011
Sequence Number: 15049
Machine Id: 00CDE13F4C00
Node Id: MurphyT
Class: H
Type: TEMP
Resource Name: hdisk3
Resource Class: disk
Resource Type: osdisk
Location:
VPD:
Manufacturer................LEFTHAND
Machine Type and Model......iSCSIDisk
ROS Level and ID............38353030
Serial Number...............00000000
Device Specific.(Z0)........000005323B001022
Device Specific.(Z1)........000000A8

Description
DISK OPERATION ERROR

Probable Causes
MEDIA
DASD DEVICE

User Causes
MEDIA DEFECTIVE

Recommended Actions
FOR REMOVABLE MEDIA, CHANGE MEDIA AND RETRY
PERFORM PROBLEM DETERMINATION PROCEDURES

Failure Causes
MEDIA
DISK DRIVE

Recommended Actions
FOR REMOVABLE MEDIA, CHANGE MEDIA AND RETRY
PERFORM PROBLEM DETERMINATION PROCEDURES

Quote:
- Did you try to let "cfgmgr" run? With which outcome?
Yip. Came back with no errors

Quote:
- Do you use the the LUN directly or over a VIOS? If the second option: have you the same effect as in the LPAR on the VIOS too? If the first option: which drivers do you use to access the disks (SDD, PCMSDD, ??) What are your relevant software releases?
The LUN is used directly. The default iscsi drivers are being used (if that's what you mean).

Quote:
- Sometimes - very rarely - the ODM gets corrupted for no apparent reason. Did you try a "synclvodm" or something such?
I haven't tried it, can synclvodm be executed while the system is active?

Quote:
I hope this helps.
Very much. Thanks!
 

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ISCSID(8)						    BSD System Manager's Manual 						 ISCSID(8)

NAME
iscsid -- interface to kernel iSCSI driver SYNOPSIS
iscsid [-n] [-d lvl] DESCRIPTION
The iSCSI initiator runs as a kernel driver, and provides access to iSCSI targets running across a network using the iSCSI protocol, RFC 3720. The iscsid utility itself interfaces to the kernel iSCSI driver, and also communicates, using isns(3), with the iSCSI name service running on other hosts to locate services and iSCSI instances. In normal operation, iscsid is a standard daemon, and will detach from the controlling terminal using daemon(3) and then loops, reading requests, processing them, and sending responses. Communication takes place over a Unix domain socket. iscsid exits on receiving a terminate message, (no response to one that is sent to the kernel), or when an error occurs reading from or writing to the socket. The -d flag increases the debug level to lvl. Any level above 0 causes iscsid to remain in the foreground, and increases the amount of debug output. The -n flag makes the daemon single-threaded. It is envisaged that user-level communication take place with iscsid using the iscsictl(8) utility, rather than directly over its communica- tion socket. An example of setting up the in-kernel iSCSI initiator is shown in iscsictl(8). SEE ALSO
daemon(3), isns(3), iscsictl(8) HISTORY
The iscsid utility appeared in NetBSD 6.0. AUTHORS
Alistair Crooks <agc@NetBSD.org> wrote this manual page. The iscsid utility was contributed by Wasabi Systems, Inc. BSD
May 27, 2012 BSD
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