<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD><TITLE>Avoid Error Messages in /var/log/messages EMC CX300</TITLE> <META http-equiv=Content-Type content="text/html; charset=us-ascii"> <META content="MSHTML 6.00.2800.1561" name=GENERATOR></HEAD> <BODY> <DIV dir=ltr align=left>These errors are caused by Linux system applications, (e.g., blkid(8), hwinfo(8)), which issue read/write i/o directly to target device paths (i.e., /dev/sdh in your example) which are in a passive/standby state.</DIV> <DIV dir=ltr align=left> </DIV> <DIV dir=ltr align=left>Although the errors are benign, there can be a lot of them and it makes it difficult to discern the ones which are not benign.</DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px"> <DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left> <HR tabIndex=-1> From: dm-devel-bounces@redhat.com [mailto:dm-devel-bounces@redhat.com] On Behalf Of Herr, Manuel Sent: Wednesday, September 27, 2006 6:27 AM To: dm-devel@redhat.com Subject: [dm-devel] Avoid Error Messages in /var/log/messages EMC CX300 </DIV> <DIV></DIV> Hi there, i get Error Messages in my logfiles when I boot the System and then, approx. every 10 Minutes, or during an hwinfo. The Server is connected to an EMC CX 300 through 1 Qlogic HBA. The Messages only appear for the failover Device. In my Example for /dev/sdh. #multipath -ld sapdata (36006016040321900600487993216db11) [size=133 GB][features="1 queue_if_no_path"][hwhandler="1 emc"] \_ round-robin 0 [active] \_ 3:0:1:6 sdp 8:240 [active][ready] \_ round-robin 0 [enabled] \_ 3:0:0:6 sdh 8:112 [active][ready] *snip* #fdisk -l /dev/sdp Disk /dev/sdp: 143.0 GB, 143034155008 bytes 255 heads, 63 sectors/track, 17389 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sdp1 1 17389 139677111 83 Linux #fdisk -l /dev/sdh --> Generates this Error in /var/log/messages Sep 27 12:17:44 saptf2 kernel: end_request: I/O error, dev sdh, sector 0 Sep 27 12:17:44 saptf2 kernel: Buffer I/O error on device sdh, logical block 0 Configuration: /etc/multipath.conf defaults { default_features "1 queue_if_no_path" } multipaths { multipath { #mountpoint /sapdb/PF1/sapdata wwid 36006016040321900600487993216db11 alias sapdata } *snip* (some more aliases for other LUNs) *snip* } devices { device { vendor "DGC " product "*" path_grouping_policy group_by_prio getuid_callout "/sbin/scsi_id -g -u -s /block/%n" path_checker emc_clariion features "1 queue_if_no_path" hardware_handler "1 emc" failback immediate prio_callout "/sbin/mpath_prio_emc /dev/%n" no_path_retry 300 } } Loaded Modules: dm_emc 23808 1 dm_round_robin 20480 1 dm_multipath 38800 3 dm_emc,dm_round_robin dm_mod 77536 23 dm_multipath qla2300 141696 0 qla2xxx 356192 33 qla2300 #modinfo qla2300 version: 8.01.02-sles DBB4213CE377B7165AFB8AC #modinfo qla2xxx version: 8.01.02-sles F6D31250031AEB3A3B9138A Kernel: 2.6.5-7.282-smp X86_64 I searched the mailing Lists for other examples, but i didnt find any Suggestions to solve this. Thanks for help! Regarding Manuel Herr </BLOCKQUOTE></BODY></HTML>